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-
MAC
- (1) See message authentication
code.
- (2) See Media Access Control.
-
MAC address
- See Media Access Control address.
-
machine characteristic
- Values defined
in the computer.
-
machine check
- An error condition
that is caused by an equipment malfunction.
-
machine check interruption
- An interruption
that occurs as a result of an equipment malfunction or error.
-
machine-generated data structure (MGDS)
- (1) An IBM structured data format protocol for passing character data among
the various Content Manager ImagePlus for OS/390 programs.
- (2) Data
extracted from an image and put into general data stream (GDS) format.
-
machine instruction
- (1) A binary number
that directs the operation of a processor. Compilers and assemblers convert
source instructions to machine instructions.
- (2) See computer instruction.
-
machine interface (MI)
- The interface,
or boundary, between the operating system and the Licensed Internal Code.
-
machine language
- See computer language.
-
machine level control (MLC)
- A database
that contains the engineering change (EC) level and configuration of products
in the field.
-
machine object
- A program object that
has no defined storage form; the object is defined internally to the machine.
The machine aspect is not available to the user. See also data object.
-
machine-readable
- Pertaining to data
a machine can acquire or read from a storage device, a data medium, or other
source.
-
machine-reported product data (MRPD)
- Product data gathered by a machine and sent to a destination such as an IBM
support server or RETAIN. This data includes information about the configuration
and connections of this particular machine.
-
machine storage pool
- A storage pool
used by the machine and certain highly shared programs, whose size is specified
in the system value QMCHPOOL.
-
MAC protocol
- See Media Access Control protocol.
-
macro
- (1) In REXX, a program that performs
certain operations, such as text editor operations, in applications.
- (2) An instruction that causes the execution of a predefined sequence of
instructions.
- (3) A program that performs a series of automated tasks
on behalf of the user. A macro consists of three components: the trigger (when
it acts), the search (what documents it acts on), and the action (what it
does).
- (4) An XML script that defines a set of screens. Each screen
includes a description of the screen, the actions to perform for that screen,
and the screen or screens that can be presented after the actions are performed.
A macro can be specified as one of the actions to be taken when a host screen
matches the screen recognition criteria of a screen customization.
-
macro call
- See macro.
-
macroinstruction
- See macro.
-
macro temporary store (MTS)
- The SMP/E
data set used to hold updated versions of macros that will not be placed in
a target system library. They are stored during APPLY processing and deleted
by ACCEPT or STORE processing.
-
MAC sublayer
- See medium access control sublayer.
-
MADS
- See multiple
area data set.
-
magic number
- A numeric or string
constant in a file that indicates the file type.
-
magnetic ink
- An ink that contains
particles of a magnetic substance whose presence can be detected by magnetic
sensors.
-
magnetic ink character recognition
- The identification of characters through the use of magnetic ink. See also
optical character recognition.
-
magnetic storage device controller
- The I/O controller card in the card enclosure that controls the operation
of the disk, diskette, and tape devices.
-
magnetic stripe reader
- A device,
attached to a display station, that reads data from a magnetic stripe on a
badge before allowing an operator to sign on.
-
magnetic tape drive
- A technique for
moving and controlling magnetic tape.
-
magnetic tape subsystem
- A tape unit
that includes the logic interface hardware necessary to operate with a system.
-
magnetic tape unit
- A device for reading
or writing data from or to magnetic tape.
-
magneto-optic recording (MO recording)
- A method of storing information on magneto-optic media using a laser
and magnetic read/write heads. A laser is used to heat a small spot on the
media that the write head alters magnetically. The ability to focus the laser
tightly increases the data density over standard magnetic media. MO disks
are erasable and rewritable.
-
mail
- The distribution objects and
documents referred to by a mail log.
-
mailbox
- A collection of pointers
to message objects that are addressed to a single entity.
-
mail exchange record (MX record)
- A record in the Domain Name System (DNS) that indicates which host handles
mail for a particular domain.
-
mail gateway
- A machine that connects
two or more electronic mail systems (often, mail systems on different networks)
and transfers messages between them.
-
mail server framework (MSF)
- A set
of user exit points and application program interfaces (APIs) that embody
an abstract design for solutions to a number of related communications problems.
-
mail session
- A resource collection
of protocol providers that authenticate users and control user access to messaging
systems.
-
main
- A processor, named by an initialization
statement, on which jobs can execute. A main represents a single instance
of MVS. The two types of mains are global main and local main.
-
main branch
- The starting branch of
a version tree of an element. The default name for this branch is main.
-
main device scheduler (MDS)
- A device
management facility that controls the setup of input/output (I/O) devices
associated with job execution.
-
main distribution frame (MDF)
- In
the CallPath licensed program, a series of quick-connection blocks, supported
on a frame, that allows trunk lines and telephones to be connected to the
9722 Redwood system.
-
main DSP
- A dynamic support program
(DSP) that chooses jobs and supplies them to the MVS initiators.
-
main entry
- A first-level or primary
index entry in an index. Main entries are the key access points to the information,
representing the main concepts in the information. They use both the product
and the users' terminology.
-
mainframe
- A computer, usually in
a computer center, with extensive capabilities and resources to which other
computers may be connected so that they can share facilities.
-
main function
- A function that has
the identifier main. Each program must have exactly one function named main.
The main function is the first user function that receives control when a
program starts to run.
-
main index build
- In enterprise search,
the process of building the entire index. See also delta index build.
-
mainline module
- A sequence of instructions
called by a program in the main path after it is compiled.
-
mainline routine
- The first subroutine
encountered when link-editing.
-
main program
- (1) The highest level program
involved in a run unit.
- (2) The first program unit to receive control
when a program is run.
- (3) The first routine in an enclave to gain
control from the invoker. See also subprogram.
-
main service
- A dynamic support program
(DSP) that provides operator control over jobs.
-
main storage
- (1) The part of internal
storage into which instructions and other data must be loaded for running
or processing.
- (2) Program-addressable storage from which instructions
and other data can be loaded directly into registers for subsequent execution
or processing.
- (3) See memory.
-
main storage database (MSDB)
- (1) A root-segment
database that resides in virtual storage. The data in an MSDB is stored in
segments. Each segment can be available to all terminals or assigned to a
specific terminal; however, segments cannot be assigned to a terminal that
is defined through ETO. See also Fast Path.
- (2) In IMS, a root-segment database that resides in main storage and that
can be accessed to a field level.
-
main storage dump (MSD)
- (1) A representation
of the contents of main storage that was captured during a suspected i5/OS
failure. This memory content is used for problem analysis.
- (2) A process
of collecting data from the system's main storage. It can be done automatically
by the service processor as a result of a system failure, or it can be performed
manually by the operator when there appears to be a system failure.
-
main storage dump space
- A section
of storage reserved on the disk unit that is used as a place to save main
storage for recovery and debugging.
-
main storage pool
- A division of main
storage, which allows the user to reserve main storage for processing a job
or group of jobs, or to use the pools defined by the system. See also auxiliary storage pool.
-
main storage - TS queue
- A dynamic
storage area managed by CICS under the temporary storage facility. Data in
main storage is not kept from one CICS run to the next. See also auxiliary storage - TS queue.
-
maintain system history program (MSHP)
- A program used for automating and controlling various installation,
tailoring, and service activities for a VSE system.
-
maintenance
- In Backup, Recovery,
and Media Services, the tasks that must be performed on a routine basis to
perform cleanup activities and other Backup, Recovery, and Media Services
functions. Examples of maintenance are tape expiration, recovery analysis
reports, and media movement.
-
maintenance analysis procedure (MAP)
- In hardware maintenance, a step-by-step procedure that assists an IBM service
representative to trace a symptom to the cause of the failure.
-
maintenance change level (MCL)
- A
set of changes to Licensed Internal Code (LIC). MCL is functionally equivalent
to a software program temporary fix (PTF) and is intended for broad distribution.
See also fix pack.
-
maintenance-level keyword
- In diagnosing
program failures, a keyword that identifies the maintenance level of DFSMSdss.
-
maintenance mode
- The state in which
a device can be serviced but no policy-based automated provisioning can occur.
-
maintenance point
- A CICSPlex SM address
space (CMAS) that is responsible for maintaining CICSPlex SM definitions in
its data repository and distributing them to other CMASs involved in the management
of a CICSplex.
-
maintenance window
- A user-defined
time period for running only required automatic maintenance activities. See
also automatic maintenance.
-
main window
- In VisualAge RPG, a window
that is an immediate child of the desktop.
-
major/activity token
- In OSI, the
session-layer token that controls activities and major synchronize operations.
-
major object descriptor block (MODB)
- In CICSPlex SM, a control structure built by Kernel Linkage during initialization
of a CICSPlex SM component that contains a directory of all methods that make
up that component. The structure of the MODB is the same for all components.
-
major object environment block (MOEB)
- In CICSPlex SM, a control structure built by Kernel Linkage during initialization
of a CICSPlex SM component and pointed to by the MODB. MOEB stores information
critical to a CICSPlex SM component and anchors data used by the component.
The structure of the MOEB is unique to the component it supports.
-
major synchronization point
- In OSI,
a session-layer synchronization point that usually represents a logically
significant piece of work. Major synchronization points are a confirmed service.
See also minor synchronization point.
-
major synchronize
- In OSI, a confirmed
service provided by the session layer that enables peer application entities
to synchronize the exchange of data. For example, an application entity can
send data followed by a major synchronize request; its peer sends back a major
synchronize response, which indicates that it has received all of the data
that was sent up to the major synchronize request. The major synchronization
function also marks a recovery point in the data stream. See also minor synchronize.
-
major tick
- In Business Graphics Utility,
a mark on an axis that denotes character grid units on a chart. See also minor tick.
-
make
- In VisualAge RPG, the process
by which all of the components are compiled and assembled to create a VRPG
application.
-
makefile
- (1) A text file that contains
commands, which may include commands to do backups, set up build environments,
or start execution of a program. Traditionally, makefiles specify the dependencies
of target files on source files.
- (2) In UNIX, a text file containing
a list of an application's parts. The make utility uses makefiles to maintain
application parts and dependencies.
-
make utility
- A utility that maintains
all of the parts and dependencies for an application. The make utility uses
a makefile to keep the parts of a program synchronized. If one part of an
application changes, the make utility updates all other files that depend
on the changed part.
-
malformed packet
- A packet that does
not conform to TCP/IP standards for size, destination, checksum, or flags
in the TCP header.
-
MAN
- See metropolitan
area network.
-
manageability
- The ability to manage
a resource, or the ability of a resource to be managed. (OASIS)
-
manageability capability
- A capability
associated with one or more management domains. (OASIS)
-
manageability capability interface
- A Web service interface representing one manageability capability. (OASIS)
-
manageability consumer
- A user of
manageability capabilities associated with one or more manageable resources.
(OASIS)
-
manageability endpoint
- A Web service
endpoint associated with and providing access to a manageable resource. (OASIS)
-
manageability interface
- (1) A service
of a managed resource that includes the sensor and effector that are available
to an autonomic manager. The autonomic manager uses the manageability interface
to monitor and control the managed resource and any of its managed resources.
See also autonomic control loop, effector, management topic, sensor, touchpoint.
- (2) The composition
of one or more manageability capability interfaces. (OASIS)
-
manageable resource
- A resource capable
of supporting one or more standard manageability capabilities. (OASIS)
-
managed asset
- A component or resource
that is enabled for workspaces and allows content to be written to separate
workspace database schemas. See also quick publish.
-
Managed Bean (MBean)
- In the Java
Management Extensions (JMX) specification, the Java objects that implement
resources and their instrumentation.
-
managed device
- A non-node device
for which Cluster Systems Management supports power control and remote console
access.
-
managed disk (MDisk, mdisk)
- A Small
Computer System Interface (SCSI) logical unit (LU) that a Redundant Array
of Independent Disks (RAID) controller provides and a cluster manages. The
MDisk is not visible to host systems on the storage area network (SAN).
-
managed disk group
- A collection of
managed disks (MDisks) that, as a unit, contain all the data for a specified
set of virtual disks (VDisks).
-
managed element
- See managed resource.
-
managed environment
- An environment
where services, such as transaction demarcation, security, and connections
to Enterprise Information Systems (EISs), are managed on behalf of the running
application. Examples of managed environments are the Web and Enterprise JavaBeans
(EJB) containers.
-
managed group
- A group of systems
or objects managed by IBM Director.
-
managed manual mode
- The mode of operation
that allows the user to locate and move cartridges to and from drives and
cells under the direction of the library manager. The library robot implements
this mode. See also manual mode.
-
managed mode
- An environment in which
connections are obtained from connection factories that the Java EE server
has set up. Such connections are owned by the Java EE server.
-
managed node
- (1) In Internet communications,
a workstation, server, or router that contains a network management agent.
In the Internet Protocol (IP), the managed node usually contains a Simple
Network Management Protocol (SNMP) agent.
- (2) In a Tivoli environment,
a computer system on which Tivoli Management Framework is installed.
- (3) A node that is federated to a deployment manager and contains a node
agent and can contain managed servers. See also node.
-
managed object
- A resource that is
subject to management as viewed from a systems management perspective. Examples
of such resources are a connection, a scalable system, or a line.
-
Managed Object Format (MOF)
- A language
for defining Common Information Model (CIM) schemas.
-
managed object ID
- A unique identifier
for each managed object.
-
managed query
- A query that is subject
to the Query Patroller thresholds and parameters that control how a query
is handled: for example, whether it is allowed to run, is queued, or is rejected.
See also intercepted query, held query, query status.
-
managed resource
- (1) In a Tivoli environment,
a database object that represents a resource and is governed by policies.
See also resource, autonomic
computing distributed infrastructure.
- (2) An entity that exists
in the runtime environment of an IT system and that can be managed. See also
effector, monitor component, sensor.
-
managed resource ID
- The globally
unique identifier (GUID) for an instance of a managed resource that can be
used to compare the managed resource with another managed resource and find
an endpoint reference (EPR) for the managed resource. See also endpoint reference.
-
managed resource interface
- See manageability interface.
-
managed resource prototype
- An XML
document that describes a resource type and extends the manageability interface
of the managed resource such that it can be easily and readily located within
a system. Whereas a manageability interface can be used by many managed resources
of the same resource type, the managed resource prototype describes the resource
properties and any restrictions on the possible values for those properties.
See also resource type.
-
managed server
- A server within a
managed node, to which SCA modules and applications can be deployed.
-
managed software system (MSS)
- An
installed management system product that implements the managed operations
that are targets for logical operations. An MSS contains information about
configuration items, and this information is discovered by a sensor or discovery
library adapter. Its functions might be invoked by a system integration module.
-
managed space mode
- An access mode
that enables virtualization functions to be performed. See also access mode, unconfigured mode, image mode.
-
managed system
- A system that is being
controlled by a given system management application.
-
Managed System Services
- An IBM licensed
program that enables a system to be managed by a central site ES/9000 system
running the IBM NetView Distribution Manager program. Managed System Services
enables objects and program temporary fixes (PTFs) to be sent or retrieved,
PTFs to be applied, programs to be run, and the central site system to control
an initial program load (IPL) of the system.
-
managed target
- A plug-in application
that requires the support of user accounts from Tivoli Identity Manager.
-
management agent
- An agent that is
installed on a monitored computer and that communicates information to a management
server. The management agent provides the following functions: discovery,
listening and playback, ARM engine for data collection, policy management,
threshold setting, event support, and Store and Forward.
-
management application
- A software
product or solution that uses the components of the Tivoli common agent services
to manage a resource. A management application might provide one or more resource
managers. See also resource manager.
-
Management Central
- A suite of systems
management functions that is an integrated part of System i Navigator. Management
Central provides the base for managing multiple systems.
-
management class
- (1) In storage management,
a policy object that users can bind to each file to specify how the server
manages the file. The management class can contain a backup copy group, an
archive copy group, and space management attributes. The copy groups determine
how the server manages backup copies or archive copies of the file. The space
management attributes determine whether the file is eligible to be migrated
from the space manager client nodes to server storage and under what conditions
the file is migrated.
- (2) A user-defined schedule for moving objects
from one storage class to the next. Management class describes the retention
and class transition characteristics for a group of objects in a storage hierarchy.
-
management collection
- An object within
the i5/OS operating system that includes the data for a number of collections.
The collections begin when the collector is started and continue until the
collection is either ended or cycled. The system-recognized identifier for
the object type is *MGTCOL.
-
management console
- A system (server,
desktop computer, workstation, or mobile computer) on which IBM Director Console
is installed.
-
management control point
- See management server.
-
management domain
- (1) In OSI X.400, a
set of one or more message transfer agents and zero or more user agents that
make up a system capable of handling messages and is managed by either an
administration or private company.
- (2) A set of nodes that are configured
for management by Cluster Systems Management. Such a domain has a management
server that is used to administer a number of managed nodes. Only management
servers have knowledge of the domain. Managed nodes only know about the servers
managing them.
- (3) An area of knowledge relative to providing control
over, and information about the behavior, health and life cycle of manageable
resources.
-
management information
- In OSI, information--associated
with a managed object--that is operated on by management protocols to control
and monitor that object.
-
Management Information Base (MIB)
- (1) In the Simple Network Management Protocol (SNMP), a database of objects that
can be queried or set by a network management system.
- (2) A definition
for management information that specifies the information available from a
host or gateway and the operations allowed.
-
Management Information Base variable (MIB variable)
- A managed object that contains pertinent management information,
which is accessible as defined by the access mode. The MIB variable is defined
by a textual name and the corresponding object identifier, syntax, access
mode, and status, as well as a description of the semantics of the managed
object.
-
management module
- (1) In a Tivoli environment,
a file that contains the management information and instrumentation for enabling
a particular application or business system to be managed by Tivoli management
software. This file may be in the form of a Tivoli installation image or an
application management package. Types of management modules include base modules,
Tivoli Business Systems Manager modules, and Tivoli Plus modules.
- (2) The BladeCenter component that handles system-management functions. It configures
the chassis and switch modules, communicates with the blade servers and all
I/O modules, multiplexes the keyboard/video/mouse (KVM), and monitors critical
information about the chassis and blade servers.
-
management protocols
- In OSI, protocols
for use in systems management.
-
management region
- The set of managed
objects on a particular map that defines the extent of the network that is
being actively managed. The management region may vary across Tivoli NetView
maps.
-
management server
- (1) The control center
of the Tivoli Monitoring for Transaction Performance software. The management
server collects information from and provides services to the deployed management
agents. The management server provides the services and user interface needed
for centralized management.
- (2) The server on which IBM Director Server
is installed.
- (3) The server and logical partition (LPAR) that are
configured to manage Cluster Systems Management nodes.
-
management server domain
- A type of
cluster domain that consists of one or more management nodes that are used
to administer one or more redundancy nodes. See also cluster domain node.
-
management services (MS)
- In SNA,
one of the types of network services in control points and physical units.
Management services is the service provided to assist in the management of
SNA networks, such as problem management, performance and accounting management,
configuration management, and change management.
-
management topic
- A set of operations
and data elements that define a manageability interface for a managed resource.
See also manageability interface.
-
management VLAN
- See service network.
-
manager
- (1) The part of a distributed
management application that issues requests and receives notifications; that
is, uses the services of one or more agents.
- (2) In DCE Remote Procedure
Call (RPC), a set of remote procedures that implement the operations of an
RPC interface and that can be dedicated to a given type of object.
- (3) See managing process.
-
manager access
- The highest access
level that can be assigned in a Notes database access control list.
-
manager entry point vector
- In the
Distributed Computing Environment Remote Procedure Call (RPC), the entry point
vector used by the runtime code on the server side to dispatch incoming RPCs.
-
manager list
- In OSI, a list that
an agent maintains of the managing processes that are--or are eligible to
become--managers of that agent.
-
manager node
- In OSI, a node that
provides a managing process.
-
managing process
- In OSI, the part
of a systems management application that monitors and controls the resources
of an agent process. In OSI Communications Subsystem, the managing process
can send operator commands to--and receive event reports from--its agent processes.
-
mandatory entry field
- A field in
which an operator must enter at least one character.
-
mandatory feature
- A feature that
is always deployed when the software entity exposing it is deployed.
-
mandatory fill field
- A field that
a user must leave blank, or must fill in completely.
-
mandatory place
- A shared place, either
a public place or a restricted place, in which all portal users must be members.
Only portal administrators can designate a shared place to be a mandatory
place. Because membership is automatic and required, portal users cannot join
or leave mandatory places.
-
mandatory print labeling (MPL)
- A
class, defined to the Resource Access Control Facility (RACF), that causes
PSF to automatically label separator pages and data pages and to enforce the
user-printable area.
-
mangled name
- An external name, such
as a function or variable name, which has been encoded during compilation
to include type and scope information.
-
mangling
- The encoding, during compilation,
of C++ identifiers such as function and variable names to include type and
scoping information. The linker uses these mangled names for type-safe linkage.
See also demangling.
-
manifest
- (1) A special file that can
contain information about the files packaged in a JAR file. (Sun)
- (2) A text file that specifies the properties of a diagnostic guide or a tool.
- (3) A shipment confirmation that may contain tracking identification
information.
-
manifestation relationship
- In UML
modeling, a relationship that shows that an artifact implements a node.
-
manipulator
- A value that can be inserted
into streams or extracted from streams to affect or query the behavior of
the stream.
-
man page
- In UNIX systems, one page
of online documentation. Each UNIX command, utility, and library function
has an associated man page.
-
manual answer
- In data communications,
a line type that requires operator actions to receive a call over a switched
line. See also automatic answer.
-
manual call
- In data communications,
a line type requiring operator actions to place a call over a switched line.
See also automatic calling.
-
manual cartridge-entry processing
- The process by which a volume is added to the tape configuration database
(TCDB) when it is added to a manual tape library (MTL). DFSMSrmm can initiate
this process.
-
manual connection
- A virtual private
network (VPN) connection in which all of the parameters of a manual connection
must be set up manually. Manual connections do not automatically refresh the
keys that maintain data security. See also dynamic
connection.
-
manual emulator
- An emulator that
requires users to specify response values for an emulated component or reference
at run time. See also programmatic emulator, emulator.
-
manual IPL
- See attended mode IPL.
-
manual load
- In Q replication, a load
process in which the user loads data into a target table and then notifies
the replication program. See also automatic load.
-
manual mode
- (1) The mode of operation
of an Automated Tape Library Dataserver (ATLDS) that allows the operator to
locate and move the cartridges to and from drives and cells under the direction
of the library manager. In manual mode, the robot is not operating. See also
managed manual mode.
- (2) The mode of operation
in which DFSMSrmm runs without recording volume usage or validating volumes.
The DFSMSrmm Time Sharing Option (TSO) commands, Interactive System Productivity
Facility (ISPF) dialog, and inventory management functions are all available
in manual mode. See also record-only mode, warning mode.
- (3) An operating mode in which an administrator
must manually initiate deployment requests on applications or application
tiers.
-
manual tape library (MTL)
- A set of
tape drives defined as a logical unit (LU) by the installation, along with
the set of system-managed volumes that can be mounted on those drives. See
also Automated Tape Library Dataserver, tape library.
-
Manufacturing Automation Protocol (MAP)
- In OSI, a specification developed by industrial users to provide a common
set of protocols to allow communications between computers and factory floor
equipment in the manufacturing environment. It is based on a subset of the
open systems interconnection (OSI) standard.
-
manufacturing refresh
- An update of
an existing product release in which the product media are completely replaced.
A manufacturing refresh contains new function and cumulative fixes. It is
intended for new customers who want to install the current level of the product
and as an upgrade for existing installations of the release. See also test fix, interim fix, refresh pack, fix.
-
MAP
- (1) See Manufacturing
Automation Protocol.
- (2) See maintenance
analysis procedure.
- (3) See mobile application
part.
-
map
- (1) In the EJB development environment,
the specification of how an enterprise bean's container-managed persistent
fields correspond to columns in a relational database table or other persistent
storage.
- (2) A named collection of objects, symbols, submaps, and
their relationships, all of which represent the network topology.
- (3) In BMS, a format established for a page or a portion of a page, or a set of
screen format descriptions. A map relates program variables to the positions
in which their values appear on a display device. A map contains other formatting
information such as field attributes. A map describes constant fields and
their position on the display, the format of input and output fields, the
attributes of constant and variable fields, and the symbolic names of variable
fields.
- (4) An entity that contains the Java code to specify how to
transform attributes from one or more source business objects to one or more
destination business objects. A map either converts from an application-specific
business object to a generic business object (outbound map) or from a generic
business object to an application-specific business object (inbound map).
- (5) A specialized task that transforms data from one structure to
another.
- (6) To correlate fields in a Java class to columns in a relational
database table or other persistent storage.
-
map chaining
- The process of producing
multiple documents from a single document by executing several maps to translate
the single document.
-
map control string
- An object compiled
from a map, which contains the instructions used by the translator to translate
a document from one format to another.
-
map definition
- Definition of the
size, shape, position, potential content, and properties of BMS map sets,
maps, and fields within maps, by means of macros. See also field definition macro, map definition macro, map set definition macro.
-
map definition macro (DFHMDI)
- In
BMS, a macro that defines a map within the map set defined by the previous
DFHMSD macro. See also map definition.
-
Map Designer
- A WebSphere business
integration code-generation tool with which you create and edit map definitions
to define transformations between source and destination business objects.
-
MAPE-K loop
- See autonomic manager.
-
MAPE loop
- See autonomic manager.
-
mapped address
- A bidirectional mapping
of one address to another.
-
mapped conversation
- In advanced program-to-program
communications (APPC), a temporary connection between an application program
and an APPC session in which the system provides all the information on how
the data is formatted.
-
mapping
- (1) A representation of one thing
to another.
- (2) In BMS, the process of transforming field data to
and from its displayable form.
- (3) The process of transforming data
from one application-specific format to another.
- (4) The act of developing
and maintaining a map.
-
mapping cardinality
- The granularity
of the way that message elements are mapped from message source to message
target. For example, one source element to one target element, or many source
elements to one target element.
-
mapping object
- (1) A function of AFP
Utilities that maps a database field value to an object name.
- (2) An object that passes values to the IBM-supplied mapping program. It is used
to customize the PDF subsystem without writing a mapping program. See also
mapping program, PDF subsystem.
-
mapping program
- An exit program used
to interpret routing tags, to specify the subject of an e-mail, to add text
to the beginning of an e-mail, to specify the path to store the PDF stream
file, and more. See also intelligent routing, PDF subsystem, mapping object.
-
mapping specialist
- The person responsible
for creating data transformation maps, validation maps, and functional acknowledgment
maps using the Data Interchange Services client.
-
mapping table
- (1) An object that contains
a set of hexadecimal characters used to map data from one character set and
code page to another. For example, unprintable characters can be mapped to
blanks, and lowercase alphabetic characters can be mapped to uppercase characters.
- (2) A table that the REORG utility uses to map the associations of
the RIDs of data records in the original copy and in the shadow copy. This
table is created by the user.
-
map record
- The record that maps the
tracks dumped by DFSMSdss.
-
map set
- In basic mapping support
(BMS), one or more maps combined in a map set. The effects of this combination
are to reduce the number of entries in the PPT, and to load simultaneously
all maps needed for one application.
-
map set definition macro (DFHMSD)
- A macro that is used to define a set of BMS maps. See also map definition.
-
map set suffix
- In BMS, a suffix relating
different versions of a map set to different terminal models or partitions.
This allows you to format the same data differently on different screen types,
in response to the same programming request.
-
margin A
- The margin between the 7th
and 8th character positions of a reference format for a COBOL source program
line.
-
margin B
- The margin between the 11th
and 12th character positions of a reference format for a COBOL source program
line.
-
margin C
- The margin between the 6th
and 7th character positions of a reference format for a COBOL source program
line.
-
margin L
- The margin immediately to
the left of the leftmost character position of a reference format for a COBOL
source program line.
-
margin R
- The margin immediately to
the right of the rightmost character position of a reference format for a
COBOL source program line.
-
margin text
- Notes written in the
margins on the top, bottom, left, or right of a document.
-
marker
- In the GDDM function, a symbol
centered on a point. Line charts may use markers to indicate the plotted points.
-
marker bar
- The gray border at the
left of the editor area of the workbench, where bookmarks and breakpoints
are shown.
-
market basket analysis
- A data mining
process for analyzing sales transaction data that determines which products
customers purchase together. Retail organizations can use market basket analysis
to optimize the placement of products on Web sites or on shelves.
-
marketing event
- In WebSphere Commerce,
any event within the system that is considered to be significant for the purposes
of marketing. Examples include catalog browsing, navigation, and shopping
cart activity.
-
marketing manager
- A defined role
in WebSphere Commerce that monitors, analyzes, and understands customer behavior.
The marketing manager also creates and modifies customer segments for targeted
selling and creates and manages campaigns.
-
marketplace
- A business-to-business
e-commerce Web site in which those organizations granted access to the site
are presented with a unified view of the products and services being traded
on that site. They are also provided with a variety of trading mechanisms
to facilitate trade among themselves.
-
marking
- (1) In QoS, the process of setting
the bits in the Internet Protocol (IP) type-of-service byte. This is primarily
a mechanism that is used in differentiated services. As an example, in-profile
packets could be marked with one differentiated services code point, while
out-of-profile packets are marked with another code point.
- (2) A method
of updating certain structured fields to identify a resource as printer-resident.
-
markup language
- A notation for identifying
the components of a document to enable each component to be appropriately
formatted, displayed, or used.
-
marooned log data
- In an RSR environment,
active subsystem log data at the tracking subsystem that follows a gap. Marooned
log data cannot be processed by the tracking subsystem until the log data
that fills the gap has been received.
-
marshal
- (1) To copy data into a remote
procedure call (RPC) packet by using a stub. See also unmarshal.
- (2) To convert an object into a data stream for transmission
over a network.
-
marshaling
- See serialization.
-
MAS configuration
- See multi-access spool configuration.
-
mashup
- A Web 2.0 genre of interactive
Web applications that draw upon content retrieved from external data sources
to create entirely new and innovative services. The most prominent types of
mashups are mapping mashups, video and photo mashups, search and shopping
mashups, and news mashups.
-
mask
- (1) A pattern or template that is
applied to an Internet Protocol (IP) address to specify which bits are significant
and which bits are irrelevant.
- (2) A pattern of bits or characters
that controls the keeping, deleting, or testing of portions of another pattern
of bits or characters.
- (3) Data that is used to extract information
that is stored in another location.
-
masking character
- A character used
to represent optional characters at the front, middle, or end of a search
term. Masking characters are normally used for finding variations of a term
in a precise index. See also wildcard character.
-
masquerade NAT
- A TCP/IP function
that allows a user to translate multiple Internet Protocol (IP) addresses
to another single IP address. Masquerade NAT is used to hide one or more IP
addresses on an internal network behind an IP address that will be made public.
Traffic can initiate from the private internal addresses only.
-
mass delete
- The deletion of all rows
of a table.
-
massively parallel processing (MPP)
- The coordinated execution of a single request by multiple single-processor
computers in a shared-nothing environment (in which each computer has its
own memory and disks). See also inter-partition parallelism, database partitioning, Database Partitioning Feature.
-
master
- (1) In a multi-MVS or VSE MRO
XRF configuration, a region that issues commands to dependent regions at takeover
time. See also coordinator.
- (2) The client
that initiates a process step.
-
master address space
- The virtual
storage used by the master scheduler task.
-
master build descriptor
- In EGL, a
build descriptor part whose options cannot be overridden.
-
master catalog
- (1) The main catalog containing
all products, SKUs, descriptions, and standard pricing for each product. See
also online catalog, sales
catalog.
- (2) A key-sequenced data set (KSDS) or file with an index
containing extensive data set and volume information that the Virtual Storage
Access Method (VSAM) requires to locate data sets or files, allocate and deallocate
storage space, verify the authorization of a program or operator to gain access
to a data set or file, and accumulate usage statistics for data sets or files.
-
master configuration
- The configuration
data held in a set of files that form the master repository for either a deployment
manager profile or a stand-alone profile. For a deployment manager profile,
the master configuration stores the configuration data for all the nodes in
the network deployment cell.
-
master console
- A serviceability focal
point for the TotalStorage products that provides features such as service
alert and remove access.
-
master CQS
- The CQS that coordinates
a sysplex-wide task. The other CQSs sharing in the task are participants.
If the master CQS fails for any reason, another CQS takes over the role of
master and either continues or aborts the task.
-
master database
- In an RSR environment,
a database at the active site. If a remote takeover occurs, the shadow database
becomes the master database.
-
master file
- A collection of permanent
information, such as a file of customer addresses.
-
master index
- An index made up of
entries from two or more components or deliverables. Examples are master indexes
for a product information center, a solution containing more than one product,
or a PDF library.
-
master metadata server
- The metadata
server in a cluster that is responsible for load balancing and physical-space
allocation.
-
master name server
- A name server
that provides secondary name servers with domain data.
-
master port
- In fibre-channel trunking,
the port that determines the routing paths for all traffic flowing through
the trunking group.One of the ports in the first inter-switch link (ISL) in
the trunking group is designated as the master port for that group. See also
ISL Trunking.
-
master profile
- In System i Access
family, a file that contains the session profiles and keyboard profiles for
a user's workstation function session.
-
master release calender
- A view that
displays timelines for all of the releases that are defined in the environment.
The view provides general release information as well, and the calendar can
be toggled to show hourly, daily, weekly, and monthly timelines.
-
master replica
- (1) In the DCE Cell Directory
Service (CDS), the first instance of a specific directory in the namespace.
After copies of the directory have been made, a different replica can be designated
as the master, but only one master replica of a directory can exist at a time.
CDS can create, update, and delete object entries and soft links in a master
replica.
- (2) In ClearCase MultiSite, the replica at which a mastered
object can be modified or instances of the object can be created.
-
masters catalog
- A service that lists
and manages course masters.
-
mastership
- The ability to modify
an object or to create instances of an object in a replica.
-
masters manager
- A person who creates
classroom and learning event masters through the Administrator interface;
a person who manages the sum of learning content in the system.
-
master sort table
- A system-supplied
table that contains sort information required for sorting double-byte characters.
This table is maintained by the character generator utility function of the
Application Development ToolSet feature.
-
master system
- (1) The MVS system on which
the master DFSMSrmm control data set (CDS) resides.
- (2) In z/VM Center,
an operating system instance that has been set up to serve Virtual Server
Deployment as a model for creating operating system templates.
-
master table
- In SQL replication,
specifically in update-anywhere replication, the original source table for
data in the replica table. If replication conflict detection is enabled, changes
made to the master table are retained, whereas changes made to the replica
table are rejected. See also conflict detection, replica table, update-anywhere
replication.
-
master terminal
- (1) The IMS logical terminal
that has complete control of IMS resources during online operations.
- (2) In CICS, the terminal at which a designated operator is signed on.
-
master terminal formatting option
- An MFS option that provides a format for a 3270 master terminal.
-
master terminal function
- A function
that allows a user to dynamically control and alter the operation of a CICS
system.
-
master terminal operator (MTO)
- Any
CICS operator authorized to use the master terminal functions transaction.
-
master virtual disk
- In most cases,
the virtual disk (VDisk) that contains a production copy of the data and that
an application accesses. See also auxiliary virtual
disk, relationship.
-
master volume
- (1) A private volume that
contains data that is available for write processing.
- (2) The first
volume assigned to the system storage pool that stores the most critical system
metadata.
-
matched credit
- A credit payment that
has been matched with a credit advice. Such credits are not considered when
calculating the expected end-of-day position of their corresponding channels.
See also full matching, partial matching.
-
matched signature
- A signature that
can be defined as multiple instances of a software signature, depending on
how many instances of the software signature have been detected.
-
match fields
- In RPG primary or secondary
multifile processing, fields within a record type that are to be used for
checking the order of a single file, or for matching records of one file with
those of another file.
-
matching record indicator (MR indicator)
- An indicator used in calculation or output specifications to indicate
operations that are to be performed only when records match in primary and
secondary files.
-
matching rule
- A rule that describes
how to perform a comparison.
-
match level
- In RPG, the value (M1
through M9) assigned to the match field. The match level identifies fields
by which records are matched during primary or secondary multifile processing.
-
materialize
- (1) To put rows from a view
or nested table expression into a work file for additional processing by a
query.
- (2) To place an LOB value into contiguous storage. Because
LOB values can be very large, DB2 for z/OS avoids materializing LOB data until
doing so becomes absolutely necessary.
-
materialized query table (MQT)
- A
table whose definition is based on the result of a query and whose data is
in the form of precomputed results that are taken from the table or tables
on which the MQT definition is based. See also summary
table.
-
matrix
- An arrangement in rows and
columns.
-
mature project
- An existing project
that has a work breakdown structure (WBS) and assigned resources.
-
MAU
- See multistation
access unit.
-
maxcon
- The number of conversations
that can be active at one time.
-
max connects
- The maximum number of
foreground and background users and Time Sharing Option (TSO) connections
allowed to a DB2 subsystem.
-
maximize
- A choice that, when selected,
enlarges the window to its largest possible size.
-
maximum transfer unit (MTU)
- The maximum
number of bytes that an Internet Protocol (IP) datagram can contain.
-
maximum transmission unit (MTU)
- The largest possible unit of data that can be sent on a given physical medium
in a single frame. For example, the maximum transmission unit for Ethernet
is 1500 bytes.
-
maximum use
- A number indicating the
maximum number of times a compound or simple element can repeat.
-
Mb
- See megabit.
-
MB
- See megabyte.
-
MBCS
- See multibyte
character set.
-
MBean
- See Managed Bean.
-
MBean provider
- A library containing
an implementation of a Java Management Extensions (JMX) MBean and its MBean
Extensible Markup Language (XML) descriptor file.
-
MBO
- See message
backout table.
-
Mbps
- See megabits
per second.
-
MCA
- (1) See Micro
Channel architecture.
- (2) See message channel
agent.
-
MCAST
- A proprietary transfer protocol
that delivers the same file to several client computers using multicast. See
also PCAST.
-
MCB
- See message
control block.
-
MCDS
- See migration
control data set.
-
MCI
- See message
channel interface.
-
MCL
- See maintenance
change level.
-
MCM
- See multiple
chip module.
-
MCS
- See multiple
console support.
-
MCS console
- A device that can be
physically attached to a global or local processor.
-
MCSL
- See Monitoring
Collection Specification Language.
-
MCT
- See monitoring
control table.
-
MCU
- See multipoint
control unit.
-
MD5
- A type of message algorithm that
converts a message of arbitrary length into a 128-bit message digest. This
algorithm is used for digital signature applications where a large message
must be compressed in a secure manner.
-
MDB
- See message-driven
bean.
-
MDC table
- See multidimensional clustering table.
-
MDF
- (1) See main
distribution frame.
- (2) See multiple device
file.
-
MDH
- See migration
data host.
-
MDisk
- See managed disk.
-
mdisk
- See managed disk.
-
MDS
- See main
device scheduler.
-
MDSP
- See Mobile
Data Synchronization Protocol.
-
MDSS
- See Mobile
Data Synchronization Service.
-
MDT
- See modified
data tag.
-
mean time between failures (MTBF)
- A number representing the hours between initial use and failure of an average
unit in a specific population of units under specified conditions. MTBF is
obtained by dividing the total number of failures into the total number of
operating hours of all units.
-
mean time to recovery (MTTR)
- The
average time it takes to make a system operational after a failure.
-
mean time to repair (MTTR)
- A measure
of serviceability indicating the expected time required to repair a unit after
failure.
-
measure
- (1) A metric combined with an
aggregation type such as average, count, maximum, minimum, sum, or average.
- (2) Metrics such as count, maximum, minimum, sum, or average that
are used in a fact table. Measures can be calculated with an SQL expression
or mapped directly to a numerical value in a column.
-
measurement group
- A grouping or classification
of measurement types. This grouping can represent any of the characteristics
of the measurement, including grouping the measurements into broad classes,
such as performance or availability.
-
measurement source
- The source application
where a measurement originates.
-
measurement type
- The class or meaning
of a particular measurement. The measurement type identifies what a particular
measurement represents, such as PERCENTUSED for the amount of disk space that
is used on a particular component. For each measurement type there are many
measurements recorded. Measurement types remain the same across different
components, while the measurements themselves are related to only one component.
-
mechanism
- (1) A specific algorithm or
operation (such as a queueing discipline) that is implemented in a node to
realize a set of one or more per-hop behaviors.
- (2) A pattern that
provides a common solution to a common problem in a given context.
-
media
- (1) In Backup, Recovery, and Media
Services, physical tape cartridges, tape reels, or removable storage devices
available for use by the system. This media is grouped into media classes
for management, tracking, and statistical analysis.
- (2) Magnetic disks,
magnetic tapes, compact discs (CDs), and digital video disks (DVDs).
-
Media Access Control (MAC)
- In networking,
the lower of two sublayers of the Open Systems Interconnection model data
link layer. The MAC sublayer handles access to shared media, such as whether
token passing or contention will be used. See also LAN emulation, Logical Link Control.
-
Media Access Control address (MAC address)
- A hardware address that uniquely identifies each node of a network.
On a local area network (LAN), the MAC address is the unique hardware number
of a computer's network adapter card.
-
Media Access Control protocol (MAC protocol)
- In a local area network, the protocol that determines which device
has access to the transmission medium at a given time.
-
media access method
- The method for
determining which device has access to the transmission medium at any time.
-
media archiver
- A physical device
that is used for storing audio and video stream data. The VideoCharger is
a type of media archiver. See also storage system.
-
media class
- In Backup, Recovery,
and Media Services, a user-defined name used to identify the type and characteristics
of the physical media to be managed as a group for backup, archive, or recovery
operations. Each media class is distinguished by attributes, such as format
or capacity, that are used by the system.
-
media descriptor
- The XML description
that identifies the location of files that are defined in an installable unit
deployment descriptor (IUDD). See also artifact, bound file, descriptor.
-
media format
- The type of volume,
recording format, and techniques used to create the data on the volume.
-
media image
- In WebSphere MQ on UNIX
systems and WebSphere MQ for Windows, the sequence of log records that contain
an image of an object. The object can be re-created from this image.
-
media inventory
- In Backup, Recovery,
and Media Services, a library that contains information about media that has
been enrolled in Backup, Recovery, and Media Services. The media inventory
contains information such as volume serial identifier, expiration date, creation
date, and location. Media in the media inventory is used for backup, archive,
and recovery operations.
-
medialess
- Pertaining to a personal
computer or workstation that does not have a diskette or tape drive or a hard
disk.
-
medialess programmable workstation
- A programmable workstation that does not contain a diskette or tape drive
or a hard disk. Cooperative processing is done through a shared folder on
the server.
-
media library device (MLD)
- A tape
storage device that contains one or more tape drives, tape cartridges, and
a part (carriage and picker assembly) for moving tape media between the cartridge
storage slots and the tape drives.
-
media management
- In Backup, Recovery,
and Media Services, the overall control, cataloging, and tracking of removable
media by status, storage location, container placement, and contents by volume
from creation to expiration. Backup, Recovery, and Media Services tracks only
enrolled volumes. Tapes and other media are managed by media class and individual
volumes within the class. Both active and expired media are tracked by volume
serial number.
-
media management system
- A program
that assists in managing removable media. DFSMSrmm is an example of a media
management system.
-
media origin
- (1) One of the four corners
of the physical medium (usually paper) where printing begins.
- (2) The first hardware addressable point on the physical sheet.
- (3) The
reference point from which the logical page origin is positioned by the medium
map. This point is represented by Xm=0, Ym=0 in the Xm, Ym coordinate system.
The media origin is defined relative to the top-left corner of the form. See
also logical page origin.
-
media policy
- In Backup, Recovery,
and Media Services, a policy that defines the default values used for management
of a media class. A user can have multiple media policies (one for each media
class) to define such things as the move policy used for this media class,
the type of retention, the use of save files, and the number of copies to
be made. Values for a media policy are inherited from the system policy and
can be overridden by the media policy or by the user at the control group
level.
-
media pool
- In Backup, Recovery, and
Media Services, a grouping of media by similar characteristics such as by
tape density or tape capacity. A media pool is used to help track media and
protect the active data on the media. Synonymous with media class.
-
media server
- An AIX-based component
of the Content Manager system that is used for storing and accessing video
files.
-
media set
- (1) In Backup, Recovery, and
Media Services, a multivolume tape group created as a result of a backup operation
or archive operation. Media sets are managed as a group to provide consistent
management of single and multivolume output and to provide integrity in cases
where an individual volume in a media set is expired in advance of the remaining
volumes.
- (2) In software distribution and installation, a multivolume
CD-ROM, CD-R, or tape group created for the purpose of distributing a selection
of software to customers for installation on to the system. Some media sets,
for example, a system software release upgrade media set, may consist of a
collection of smaller media sets, each containing a specialized selection
of the Licensed Internal Code, licensed programs, the operating system, and
program temporary fixes needed to operate the system and use it to do business.
-
mediation
- An application of service
interaction logic to messages flowing between service requesters and providers.
-
mediation flow
- A sequence of processing
steps, or mediation primitives, that run to produce the mediation when a message
is received.
-
mediation flow component
- A component
that contains one or more mediation primitives arranged into request and response
flows. Rather than performing business functions, mediation flow components
are concerned with the flow of messages.
-
mediation module
- An SCA module that
includes a mediation flow component and primarily enables communication between
applications by changing the format, content, or target of service requests.
-
mediation primitive
- A basic interface
or programming element that can be used to build mediation flow components.
Mediation primitives accept messages and process them by performing actions
such as routing or transforming. Mediation primitives are connected together
to run the logic of a mediation flow.
-
mediation service
- A service that
intercepts and modifies messages that are passed between client services (requesters)
and provider services.
-
Medical Subject Headings (MeSH)
- The U.S. National Library of Medicine's controlled vocabulary thesaurus. It
consists of sets of terms naming descriptors in a hierarchical structure that
permits searching at various levels of specificity.
-
medium
- The material on which computer
information is stored. Examples of media are diskettes, CDs, and tape.
-
Medium Access Control (MAC)
- See Media Access Control.
-
medium access control sublayer (MAC sublayer)
- One of two sublayers of the ISO Open Systems Interconnection
data link layer proposed for local area networks by the IEEE Project 802 Committee
on Local Area Networks and the European Computer Manufacturers Association
(ECMA). It provides functions that depend on the topology of the network and
uses services of the physical layer to provide services to the logical link
control (LLC) sublayer. The OSI data link layer corresponds to the SNA data
link control layer.
-
medium attachment unit
- See transceiver.
-
medium map
- An internal object in
a form definition or a print data set that controls such items as modifications
to a form, page placement, and overlays.
-
medium name
- In DFSMSrmm, a value
of up to eight characters that describes the type and shape of removable media
located in a storage site.
-
medium overlay
- An electronic overlay
that is invoked by the medium map of a form definition for printing at a fixed
position on the form. See also floating overlay.
-
meeting
- A virtual gathering of two
or more people to do work. It can include, but is not limited to, chat, IP
audio/video, screen sharing, shared whiteboard, or telephone conference calls.
-
meeting service
- A data-sharing service
that supports screen sharing and the shared whiteboard.
-
meeting status
- The current status
of an online meeting as displayed in the list of meetings. The status could
be active, scheduled, or finished. See also active
meeting, scheduled meeting.
-
meet-in-the-middle mapping
- An approach
for mapping enterprise beans to database tables in which enterprise beans
and database schema are created simultaneously but independently.
-
megabit (Mb)
- For processor storage,
real and virtual storage, and channel volume, 2 to the power of 20 or 1 048
576 bits. For disk storage capacity and communications volume, 1 000 000 bits.
-
megabits per second (Mbps)
- See also
kilobits per second.
-
megabyte (MB)
- For processor storage,
real and virtual storage, and channel volume, 2 to the 20th power or 1 048
576 bytes. For disk storage capacity and communications volume, 1 000 000
bytes.
-
megahertz (MHz)
- A unit of measure
of frequency. One megahertz equals 1 000 000 hertz.
-
member
- (1) In i5/OS, one of several different
sets of data, each with the same format, within one database file.
- (2) A data object in a structure, a union, or a library.
- (3) A C++
data object or function in a structure, union or class. Members can also be
classes, enumerations, bit fields and type names.
- (4) A partition
of a partitioned data set (PDS) or partitioned data set extended (PDSE).
- (5) A person, group, or organization known to the system. A member can be
a user, an organization, an organization unit, or a member group.
- (6) A specific function of a multisystem application that is defined to the cross-system
coupling facility (XCF) and assigned to a group by the multisystem application.
A member residing on one system in a sysplex can use XCF services to communicate
with other members of the sysplex.
- (7) In multidimensional clustering,
the element of a dimension. See also dimension.
-
member function
- A C++ operator or
function that is declared as a member of a class. A member function has access
to the private and protected data members and member functions of an object
of its class. Member functions are also called methods.
-
member group
- A group that is used
to implement role-based control in WebSphere Commerce. A customer group is
for general use, while an access group is for access control purposes.
-
member ID
- The member name of a resource
object minus the 2-character prefix. For example, BITR is the member ID of
the font whose member name is X1BITR.
-
member name
- (1) The z/OS XCF identifier
for a particular DB2 for z/OS subsystem in a data sharing group.
- (2) In AFP, the name under which a file is stored in a library. For example X1S0BITR
is the member name of a font in the font library.
-
membership
- The state of being a portal
user and a place member. Membership in the portal is controlled by the administrator
during the installation and set up of portal servers. Membership in places
is controlled by a place manager, who determines the level of access for each
place member: participant, place designer, or place manager.
-
membership policy
- A subexpression
that is evaluated against the nodes in a cell to determine which nodes host
dynamic cluster instances.
-
memory
- Program-addressable storage
from which instructions and other data can be loaded directly into registers
for subsequent running or processing. See also auxiliary
storage.
-
memory affinity
- A feature available
in AIX to allocate memory attached to the same multiple chip module (MCM)
on which the process runs. Memory affinity improves the performance of applications
on IBM System p servers.
-
memory leak
- The effect of a program
that maintains references to objects that are no longer required and therefore
need to be reclaimed.
-
memory pool
- A logical division of
memory (storage) that is reserved for processing a job or group of jobs. Synonymous
with main storage pool.
-
MEMS
- See Micro-Electric
Mechanical System.
-
menu
- A displayed list of items from
which a user can make a selection.
-
menu bar
- (1) The area near the top of
a window, below the title bar and above the rest of the window, that contains
choices that provide access to other menus.
- (2) In the AIX operating
system, a rectangular area at the top of the client area of a window that
contains the titles of the standard pull-down menus for that application.
-
menu bar field
- In DDS, a panel element
that contains a numeric field containing one or more menu-bar choice keywords.
-
menu bar separator
- In DDS, a panel
element that contains a horizontal line that appears directly below a menu
bar.
-
menu bar switch key
- A key that alternates
the cursor between the menu bar and that application display.
-
menu file
- A text file that contains
specific syntax to add menu items to any menu.
-
menu security
- A function of the operating
system that controls which system resources are available to users. Menu security
restricts a user to a single menu or a sequence of menus that are defined
in the user profile.
-
merchandising association
- An association
between two catalog items for the purpose of a sales activity. For example,
a camera might have a "requires" merchandising association with a set of batteries,
and a dictionary might have a "goes with" merchandising association with a
thesaurus. See also accessory.
-
merge
- (1) To insert records throughout
a single output file.
- (2) To combine overrides for a file from the
first call level up to and including a greater call level, producing the override
to be applied when the file is used.
- (3) To update and insert new
content into a table.
- (4) A process element that recombines multiple
processing paths, usually after a decision. A merge brings several alternative
paths together.
-
merged model
- A model that contains
the resolved differences and conflicts after a merge session.
-
merge file
- In COBOL, the temporary
file that contains all the records to be merged by a MERGE statement. The
merge file is created and can be used only by the merge function.
-
merge session
- In version control
software, the forum in which conflicting versions of a contributor are resolved
and combined.
-
MERVA for ESA
- An IBM licensed program
that is a message queuing and routing system that allows a financial institution
to process all kinds of financial messages. Access to the SWIFT Transport
Network (STN) is included as a standard communication link.
-
MERVA Link
- A MERVA component that
can be used to interconnect several MERVA systems.
-
MES
- See miscellaneous
equipment specification.
-
MeSH
- See Medical
Subject Headings.
-
mesh-connected session network
- A
configuration where every network node has a control point-to-control point
session to every other network node. As the number of network nodes increases,
the number of CP-to-CP sessions increases dramatically.
-
message
- (1) A communication sent from
a person or program to another person or program.
- (2) In OSI Message
Services, a piece of electronic mail in the format of the X.400 CCITT standard.
An X.400 message can be a document, note, message, or file.
- (3) An
assembly of characters and sometimes control codes that is transferred as
an entity from an originator to one or more recipients. A message consists
of two parts: envelope and content.
- (4) A formatted transfer unit
used to exchange control or payment information.
- (5) In system programming,
information intended for the terminal operator or system administrator.
- (6) A set of data that is passed from one application to another. A message
can be modeled by a message definition, which describes the structure and
content of the message. Messages must have a structure and format that is
agreed by the sending and receiving applications. See also category.
- (7) In UML modeling, a model element that defines a
specific kind of communication between participants (roles or objects) in
an interaction.
-
message area
- In BMS, the area of
a screen used to send instruction messages to assist the operator in processing
a transaction. This area should be separate from the application data area
to allow communication with the operator, without disturbing the application
data. The message area is normally the bottom one or two lines of the screen.
-
message authentication code (MAC)
- (1) In Cryptographic Support, the first 4 bytes from the last 8-byte block of
ciphertext produced when encrypting a message using cipher block chaining,
that is added to the end of the plaintext message from which it was created
and used to detect whether the message was changed during transmission.
- (2) In computer security, a value that is a part of a message or accompanies
a message and is used to determine that the contents, origin, author, or other
attributes of all or part of the message are as they appear to be.
-
message authentication key
- In Cryptographic
Support, a data encrypting key used to encrypt data to produce a message authentication
code.
-
message backout table (MBO)
- In the
restart data set, a summary table that contains an entry for each terminal
for which logged or journaled message or message resynchronization records
were written to the restart data set. Data in this table is available to user-written
exit programs.
-
message body
- The part of the message
that contains the message payload. See also message
header.
-
message box
- A secondary window that
displays a message about a particular situation or condition.
-
message broker
- See broker.
-
message cache
- A temporary storage
queue with a DATAID of DFHMxxxx, where xxxx is the identification of a logical
unit, into which CICS reads messages (for message-protected tasks only) during
emergency restart. A user-written enquiry program run after emergency restart
can read the contents of message caches. CICS does not read or purge message
caches.
-
message category
- A group of messages
that are logically related within an application.
-
Message Center
- An IBM product that
uses DirectTalk's voice processing capabilities to provide a wide range of
voice mail, fax, and e-mail functions.
-
message channel
- In distributed message
queuing, a mechanism for moving messages from one queue manager to another.
A message channel comprises two message channel agents (a sender at one end
and a receiver at the other end) and a communication link.
-
message channel agent (MCA)
- A program
that transmits prepared messages from a transmission queue to a communication
link, or from a communication link to a destination queue. See also Message Queue Interface.
-
message channel interface (MCI)
- The WebSphere MQ interface to which customer- or vendor-written programs that
transmit messages between a WebSphere MQ queue manager and another messaging
system must conform. A part of the WebSphere MQ Framework.
-
message class
- A class, assigned to
a transaction code, that determines within which message region an application
program is to process that transaction. See also class, region class, transaction
class.
-
message context
- Information about
the originator of a message that is held in fields in the message descriptor.
There are two categories of context information: identity context and origin
context.
-
message control block (MCB)
- The definition
of a message, screen panel, net format, or printer layout made during customization
of MERVA.
-
Message Control Information
- The part
of the OTMA message prefix that contains such information as the transaction
pipe name and the message type. It is not contiguous with the rest of the
message prefix and it must be specified for every OTMA message.
-
message data set
- (1) A data set on disk
storage that contains queues of messages awaiting transmission to particular
terminal operators or to the host system.
- (2) In PSF, a virtual data
set built by the library access system interface (LASI) subcomponent in memory
to store error messages for printing at the end of the document.
- (3) The message data set is used principally to pass messages about the current
state of specific resources from the active system to the alternate system.
It is also used for the secondary surveillance signals of the active, alternate,
or both CICS systems, when the control data set is unavailable for this purpose,
either because the last write has not completed yet or because of I/O errors.
-
message definition
- A logical description
of a message. A message definition is a structured collection of simple elements.
-
message definition file
- A file that
contains the messages, elements, types, and groups that make up a message
set.
-
message delete option
- An option that
may be defined to prevent nonessential messages from being sent to a specific
terminal.
-
message delivery preference
- The subscriber's
choice of whether voice mail is stored as voice mail only, as e-mail only,
or as both voice mail and e-mail.
-
message delivery type
- The format
in which a voice message is delivered.
-
message descriptor
- Control information
describing the message format and presentation that is carried as part of
a WebSphere MQ message. The format of the message descriptor is defined by
the MQMD structure.
-
message destination
- A destination
that is a transaction, an LTERM, an MSNAME, or a command.
-
message dictionary
- A data structure
that describes all the messages in a message set in a form suitable for deployment
to a broker.
-
message digest
- A hash value or a
string of bits resulting from the conversion of processing data to a number.
-
message domain
- (1) A grouping of messages
that share certain characteristics. A message domain has an associated parser
that interprets messages that are received and generated by a broker. WebSphere
Business Integration Message Broker supports messages in the BLOB domain,
JMS domain, MRM domain, and XML domain. User-defined parsers can be used to
support messages that do not conform to the supported domains.
- (2) Major component of CICS. It is a repository for CICS messages and it handles
the sending of messages to transient data destinations or to the console.
It also provides an interface for returning the text of a message to the caller.
-
message-driven bean (MDB)
- An enterprise
bean that provides asynchronous message support and clearly separates message
and business processing.
-
message-driven program
- An application
program that is initiated by the scheduling of an input message. The types
of message-driven programs are MPP, IFP, and JMP. See also non-message-driven program.
-
message editing
- The process by which
messages are formatted for presentation to an application program or terminal.
Additional message editing routines may be written by the user. See also basic edit.
-
message envelope
- The information
associated with a message aside from attachments and recipients.
-
message exit
- A type of channel exit
program that is used to modify the contents of a message. Message exits usually
work in pairs, one at each end of a channel. At the sending end of a channel,
a message exit is called after the message channel agent (MCA) has got a message
from the transmission queue. At the receiving end of a channel, a message
exit is called before the message channel agent (MCA) puts a message on its
destination queue.
-
message field (MFLD)
- In MFS, the
smallest area in a message input or output descriptor whose content and structure
are defined by the user.
-
message file
- (1) An object that contains
message descriptions. The system-recognized identifier for the object type
is *MSGF.
- (2) In CICS, the file holding the text of all CICS messages.
- (3) A file containing messages sent in bulk through a message bulking
service.
-
message flood condition
- A condition
in which the number of incoming messages that are waiting to be processed
by OTMA threatens IMS performance or rises above acceptable limits. A message
flood condition occurs when too many transactions are waiting to be processed
by OTMA, and can deplete all available local system queue area (LSQA) storage
and result in a z/OS abend.
-
message flow
- A sequence of processing
steps that execute in the broker when an input message is received. Message
flows are defined in the workbench by including a number of message flow nodes,
each of which represents a set of actions that define a processing step. The
connections in the flow determine which processing steps are carried out,
in which order, and under which conditions. See also message broker, subflow.
-
message flow control
- A distributed
queue management task that involves setting up and maintaining message routes
between queue managers.
-
message flow node
- A processing step
in a message flow. A message flow node can be either a built-in node, a user-defined
node, or a subflow node. See also node.
-
message flow node connection
- An entity
that connects the output terminal of one message flow node to the input terminal
of another. A message flow node connection represents the flow of control
and data between two message flow nodes.
|
|
-
Message Format Service (MFS)
- (1) An editing
facility that allows application programs to deal with simple logical messages
instead of device-dependent data, thus simplifying the application development
process.
- (2) A MERVA direct service that formats a message according
to the medium to be used, and checks it for formal correctness.
-
Message Format Service control block (MFS control
block)
- In MFS, the representation of a message or format that
is stored in the IMS.FORMAT library and called into the MFS buffer pool as
needed for online execution.
-
message group
- A group of logical
messages. Logical grouping of messages allows applications to group messages
that are similar and to ensure the sequence of the messages.
-
message handling system (MHS)
- In
OSI X.400, a collection of message transfer agents and user agents that provide
support for sending and receiving messages.
-
message header
- The part of a message
that specifies the sender and receiver of the message, the message priority,
and the type of message. See also message body.
-
message help
- More information about
a message, such as the message type, severity, and date and time sent.
-
message ID
- See message identifier.
-
message identifier (message ID)
- (1) A 7-character code that identifies a predefined message, and is used to get
the message description from a message file.
- (2) A tag attached to
a message that uniquely identifies that message across all IBM products.
-
message input descriptor (MID)
- The
MFS control block that describes the format of the data presented to the application
program. See also message output descriptor.
-
Message Integrity Protocol (MIP)
- In MERVA Link, the protocol that controls the exchange of messages between
partner ASPs. This protocol ensures that any loss of a message is detected
and reported, and that no message is duplicated despite system failures at
any point during the transfer process.
-
message line
- An area on the display
where messages are displayed.
-
message log
- A file in which an application
logs messages about errors that occur or metadata about the message.
-
message mode
- A transaction attribute
that describes how the transaction is handled by the application program.
See also multiple message mode, single message mode.
-
message model
- A definition of a message
format that is used by applications. Message models are defined in the workbench.
-
message object
- An abstraction of
the data structures or system objects that store mail server framework message
information.
-
message output descriptor (MOD)
- The MFS control block that describes the format of the output data produced
by the application program. See also message input
descriptor.
-
message parser
- A program that interprets
the bit stream of an incoming message and creates an internal representation
of the message in a tree structure, and that regenerates a bit stream for
an outgoing message from the internal representation.
-
Message Passing Interface (MPI)
- A library specification for message passing. MPI is a standard application
programming interface (API) that can be used with parallel applications and
that uses the best features of a number of existing message-passing systems.
-
message performance option
- The improvement
of ISC performance by eliminating syncpoint coordination between the connected
systems.
-
message prefix
- Each message in IMS
contains a message prefix. This is a structured set of areas that define information
needed for processing each message. Some parts of the message prefix always
exist, while others are only included if the IMS system is defined with a
particular function.
-
message priority
- In WebSphere MQ,
an attribute of a message that can affect the order in which messages on a
queue are retrieved, and whether a trigger event is generated.
-
message-processing function
- The various
parts of MERVA used to handle a step in the message-processing route, together
with any necessary equipment.
-
message processing node
- (1) A node in
a message flow that represents a processing step. A message processing node
can be either a primitive or a subflow node.
- (2) See message flow node.
-
message processing program (MPP)
- (1) A program that processes or otherwise responds to messages received from terminals.
- (2) An IMS application program that is driven by transactions and
has access to online IMS databases and message queues. See also batch processing program.
-
message processing unit
- A message
processing unit is used to correlate information within a message, for example
reason or completion information, and a message text.
-
message protection
- A recovery and
restart function provided by CICS. It logs input and output messages for VTAM
terminals and enables the messages to be recovered following a system failure.
-
message protocol data unit (MPDU)
- In OSI, the elements in Protocol 1 (P1) that are used between message transfer
agents (MTAs).
-
message queue
- (1) A list on which messages
are placed when they are sent to a user ID or device description. The system-recognized
identifier for the object type is *MSGQ.
- (2) In interprocess communications,
a mechanism that allows a process to communicate with other processes by sending
messages to a process, receiving messages from a process, or performing control
operations on a process.
- (3) A set of messages that are waiting to
be processed by a program or to be sent to a terminal, display, or workstation.
- (4) A named destination to which messages can be sent until they
are retrieved by programs that service the queue.
-
Message Queue Interface (MQI)
- The
programming interface provided by WebSphere MQ queue managers. The programming
interface allows application programs to access message queuing services.
See also Application Messaging Interface, message channel agent.
-
message queue management (MQM)
- In
MQSeries for Compaq NonStop Kernel, a facility that provides access to PCF
command formats and control commands to manage queue managers, queues, and
channels.
-
message queuing
- A programming technique
in which each program within an application communicates with the other programs
by putting messages on queues.
-
Message Reception Registry (MRR)
- The registry where SWIFT stores the central routing rules. Each receiver defines
its own rules and submits them to SWIFT. SWIFT uses these rules to determine
the destination of message traffic, that is, to which store-and-forward queue
or to which SWIFTNet Link it is to route each message.
-
message recovery point
- The last inbound
message for which IMS returned a definite response or the last outbound message
for which IMS requested a definite response.
-
message reference key
- A key assigned
to every message on a message waiting line. This key is used to remove a message
from a message waiting line, to receive a message, and to reply to a message.
-
message reference number (MRN)
- A
unique 16-digit number assigned to each message for identification purposes.
The message reference number consists of an 8-digit domain identifier that
is followed by an 8-digit sequence number.
-
Message Repository Manager (MRM)
- The name given to the domain and parser associated with messages that are
modeled in the workbench.
-
message resynchronization
- A facility
that detects and corrects a lost message condition if a network failure occurs.
-
message-retry
- An option available
to an MCA that is unable to put a message. The MCA can wait for a predefined
amount of time and then try to put the message again.
-
message routing
- A method used for
building a logical message and routing it to one or more terminals. The message
is scheduled, for each designated terminal, to be delivered as soon as the
terminal is available to receive messages, or at a specified time. Terminal
operators who receive the message use terminal operator paging commands to
view it. A variety of operands on the ROUTE command allow you flexibility
when specifying the message destinations.
-
message segment
- (1) The unit of access
when referring to a message to or from a terminal.
- (2) One of a number
of segments of a message that is too large either for the application or for
the queue manager to handle.
-
message sequence number (MSN)
- A sequence
number for messages.
-
message sequence numbering
- A programming
technique in which messages are given unique numbers during transmission over
a communication link. This enables the receiving process to check whether
all messages are received, to place them in a queue in the original order,
and to discard duplicate messages.
-
message set
- A container for a logical
grouping of messages and associated message resources (elements, types, and
groups)
-
message set documentation
- A human-readable
form of message definitions that is created in the workbench.
-
message set project
- A specialized
container for the resources associated with one message set.
-
message severity
- The measurement
of how important or significant a message is. The higher the severity level,
the more severe or important the condition.
-
message signal unit (MSU)
- An MTP
packet containing data.
-
message store (MS)
- A component that
is usually associated with the local delivery exit. The message store provides
application program interfaces (APIs) for maintaining mailboxes, and it provides
pointers to message objects.
-
message subfile
- A subfile where the
records are messages from a program message queue.
-
message switch
- A terminal input message
directed to another terminal without being processed by a message processing
program. See also program-to-program message switch.
-
message switching
- The process of
receiving a message, storing it, and forwarding it to its destination unaltered.
-
message template
- A named and managed
entity that represents the format of a particular message. Message templates
represent a business asset of an organization.
-
message transfer agent (MTA)
- A program
that accepts the mail from user agents, delivers messages to user agents,
and forwards messages to other MTAs.
-
message transfer part (MTP)
- Part
of the SS7 protocol normally used to provide a connectionless service roughly
equivalent to levels one to three of the OSI reference model.
-
message transfer state
- In BSC, a
condition in which a bid exchange was completed and data can be transmitted.
-
message transfer system (MTS)
- In
OSI X.400, a collection of message transfer agents. A message transfer system
provides the means by which user agents can exchange messages.
-
message transformation
- The process
of changing the structure and values of a message (possibly an XML-based message)
from one form to another. This facilitates the ability to integrate disparate
systems with different data forms by enabling a transformation of the message
from one form to the other.
-
message transport driver
- A component
of the IBM WebSphere business integration system that interacts with the underlying
transport protocol to exchange data between InterChange Server and connectors.
-
message tree
- The logical tree structure
that represents the content and structure of a message in the broker. The
message tree is created by a message parser from the input message received
by a message flow.
-
message type (MT)
- (1) A value used to
define the type of data sent for a distribution to a recipient. The message
types supported on a system are defined when the mail server framework is
configured. The value associated with the message type must be a unique type
value.
- (2) The logical structure of the data within a message. For
example, the number and location of character strings.
- (3) A number,
up to 7 digits long, that identifies a message. SWIFT messages are identified
by a 3-digit number; for example SWIFT message type MT S100.
-
message unit identifier (MUID)
- In
SNA, a number that uniquely identifies a distribution message unit throughout
its existence. A message unit exists for only one hop, from one system to
the adjacent system.
-
message waiting indicator (MWI)
- A visible or audible indication (such as a light or a stutter tone) that a
voice message is waiting to be retrieved.
-
Message Warehouse table
- A table in
which the Message Warehouse service stores index and status information about
each message processed by services.
-
messaging
- A method for communication
between programs. Messaging can be synchronous or independent of time.
-
messaging engine
- A messaging and
connection point to which applications connect to the bus.
-
metacharacter
- In UNIX, a character
that has special meaning to the shell.
-
metaclass
- A class whose instances
are classes. Metaclasses are typically used to construct metamodels.
-
metadata
- Data that describes the
characteristics of data; descriptive data. See also application-specific business object, application-specific
information, business object definition.
-
metadata-driven connector
- A connector
that uses the metadata in its business objects to interact with an application
(such as Ariba Buyer) or a data source (such as a Web servlet). A metadata-driven
connector handles each of its supported business objects based on the metadata
encoded in the business object definition rather than on instructions hard-coded
into the connector.
-
metadata repository
- A database, text
file, XML file, or other object for storing the metadata that is used by a
software component or group of components.
-
metadata server
- A server that off-loads
the metadata processing from the data-storage environment to improve SAN performance.
An instance of the metadata server runs on each engine; together, the metadata
servers form a cluster. See also asymmetric virtualization, system pool.
-
metadata server log
- A log that maintains
a history of routine activities and error conditions that are generated by
a metadata server.
-
metadata tree
- A list in a tree structure,
which is prepared and displayed by the external service wizard, that presents
all of the objects discovered from the enterprise information system (EIS).
-
metafile
- A file containing a series
of attributes that set color, shape, and size, usually of a picture or a drawing.
Using a program that can interpret these attributes, a user can view the assembled
image.
-
metalanguage
- A language that is used
to describe or define other languages. For example, XML.
-
meta-metamodel
- A model that defines
the language for expressing a metamodel. The relationship between a meta-metamodel
and a metamodel is analogous to the relationship between a metamodel and a
model.
-
metamodel
- A model that defines the
language for expressing a model.
-
metanode
- The one node per open file
that is responsible for maintaining file metadata integrity. In most cases,
the node that has had the file open for the longest period of continuous time
is the metanode.
-
meta-object
- A generic term for all
meta-entities in a metamodeling language. For example, metatypes, metaclasses,
meta-attributes, and meta-associations.
-
Meta Object Facility (MOF)
- (1) A standard
for the definition of information models and the subsequent mapping of these
models to CORBA interfaces.
- (2) An abstract language and a framework
for specifying, constructing, and managing technology neutral metamodels.
Examples include the metamodels for UML, CWM, and the MOF itself, as well
as those in various OMG specifications in progress.
-
metaphor
- (1) A word, phrase, or visual
representation that denotes or depicts one object or idea but suggests a likeness
or analogy with another object or idea.
- (2) In WebSphere Commerce,
a usage paradigm that customers can use to navigate product catalogs. Metaphors
are provided as part of the Product Advisor component.
-
meta search
- A search across one or
more search engines. A meta search engine provides a meaningful subset of
search functionality through an abstraction layer that is generic enough to
support a wide variety of search services.
-
metatable
- In the OSI Communications
Subsystem licensed program, the machine-readable form of an abstract syntax.
The metatable is generated by the Abstract Syntax Checker and used by the
OSI Communications Subsystem presentation layer to encode and decode data
being exchanged.
-
meta tag
- In the Reusable Asset Specification
(RAS), a descriptor for classifying an asset. These descriptors may be used
for searching for assets.
-
metering
- In QoS, the process of measuring
the temporal properties (such as rate) of a traffic stream that is selected
by a classifier. The instantaneous state of this process can be used to affect
the operation of a marker, shaper, or dropper; and can be used for accounting
and measurement purposes.
-
method
- (1) In object-oriented programming,
an operation that an object can perform. An object can have many methods.
See also operation.
- (2) In object-oriented
design or programming, the software that implements the behavior specified
by an operation.
- (3) See member function.
- (4) In Java programming, a function that is defined in a class. (Sun)
- (5) A database object that encapsulates procedural logic to provide
behavior for a structured type. A method can be implemented as an SQL method
or an external method. See also structured type, external method, SQL method, routine.
- (6) A way to implement a function
on a class.
-
method authoring
- The process of creating
a template for an entire project to be used as a collection of best practices.
-
method binding signature
- A hexadecimal
value that contains the method signature (obtained from the signature bank),
inheritance level, slot, and signature of the method's class. The method binding
signature is added to the Interface Definition Language (IDL) source file
by the signature emitter.
-
method call
-
method extension
- An IBM extension
to the standard deployment descriptors for enterprise beans that define transaction
isolation methods and control the delegation of credentials.
-
method file
- (1) For ASCII locales, a
file that defines the method functions to be used by C runtime locale-sensitive
interfaces. A method file also identifies where the method functions can be
found. IBM supplies several method files used to create its standard set of
ASCII locales. Other method files can be created to support customized or
user-created codepages. Such customized method files replace IBM-supplied
charmap method functions with user-written functions.
- (2) A file that
allows users to indicate to the localedef utility where to look for user-provided
methods for processing user-designed codepages.
-
method permission
- A mapping between
one or more security roles and one or more methods that a member of a role
can call.
-
method pointer
- A special i5/OS pointer
type. A method pointer on a single class. Method pointers are not guaranteed
to be persistent between multiple jobs.
-
method procedure
- A function or procedure,
written in an arbitrary programming language, that implements a method of
a class.
-
method signature
- A hexadecimal value
obtained from a server and placed in a signature bank on the workstation.
The signature bank uniquely identifies a method. Method signatures are added
to the Interface Definition Language (IDL) source file by the signature emitter.
Method signatures are added in the form of a binding signature.
-
method statistics
- Information about
a method that includes the package (and class) to which the method belongs,
the number of calls made to the method, the CPU time spent in the method,
and the cumulative time spent in that method.
-
metric
- (1) A measurement type. Each resource
that can be monitored for performance, availability, reliability, and other
attributes has one or more metrics about which data can be collected. Sample
metrics include the amount of RAM on a PC, the number of help desk calls made
by a customer, and the mean time to failure for a hardware device. See also
service level objective.
- (2) A holder for
information, usually a business performance measurement, in a monitoring context.
-
metric evaluation
- The process of
interacting with data collectors, calculating metric values, providing information
on trends and violations, and validating metric results. See also data collection.
-
metric property
- A method for measuring
certain aspects of a resource. Each resource that can be monitored for performance,
availability, reliability, and other attributes has one or more metric properties
about which data can be collected. Sample metric properties include the amount
of RAM on a PC, the number of help desk calls made by a customer, and the
mean time to failure for a hardware device.
-
metro mirror
- A function of the remote
mirror and copy feature that constantly updates a secondary copy of a volume
to match changes made to a source volume. See also global mirror.
-
metropolitan area network (MAN)
- A network formed by the interconnection of two or more networks which may
operate at higher speed than those networks, may cross administrative boundaries,
and may use multiple access methods. See also wide
area network.
-
MFIOP
- See multifunction IOP.
-
MFLD
- See message
field.
-
MFM
- (1) See modified
frequency modulation.
- (2) See multifunction
monitor.
-
MFR1
- An in-band address signaling
system using six tone frequencies, two at a time. MFR1 is used principally
in North America and is described in ITU-T recommendations Q.310 through Q.332.
-
MFS
- See Message
Format Service.
-
MFS control block
- See Message Format Service control block.
-
MFS device descriptor
- A descriptor
used by ETO to update screen size in the DCT and generate new MFS default
formats without system generation. See also ETO descriptor.
-
MFS dynamic directory
- A technique
that is used by the online IMS control program when operating under z/OS to
manage message format control blocks that are stored in extended private storage.
-
MFSTEST
- An optional MFS facility
that allows MFS control blocks to be created and tested online without disrupting
production activity.
-
MGAS
- See mostly
global address space.
-
MGDS
- See machine-generated
data structure.
-
MHS
- See message
handling system.
-
MHz
- See megahertz.
-
MI
- See machine
interface.
-
MIB
- See Management
Information Base.
-
MIB module
- In the Simple Network
Management Protocol (SNMP), a collection of objects relating to a common management
area.
-
MIB variable
- See Management Information Base variable.
-
MIB view
- In the Simple Network Management
Protocol (SNMP), the collection of managed objects, known to the agent, that
is visible to a particular community.
-
MIB walking
- In the Simple Network
Management Protocol (SNMP), a technique of looking for Management Information
Base (MIB) tree information when it is presented in a hierarchical format.
-
microbrowser
- A Web browser designed
for small display screens on smart phones and other handheld wireless devices.
-
Micro Channel architecture (MCA)
- The rules that define how subsystems and adapters use the Micro Channel bus
in a computer. MCA defines the services that each subsystem can or must provide.
-
microcode
- (1) A code, representing the
instructions of an instruction set, that is implemented in a part of storage
that is not program-addressable.
- (2) Stored microinstructions, not
available to users, that perform certain functions. See also firmware.
-
Micro-Electric Mechanical System (MEMS)
- A technology that embeds mechanical devices such as fluid sensors, mirrors,
actuators, pressure and temperature sensors, vibration sensors and valves
in semiconductor chips.
-
microfiche (fiche)
- A sheet of microfilm
containing a photographic record on a reduced scale of printed matter.
-
microfilm
- A film containing a photographic
record of printed matter, on a reduced scale.
-
microfilm device
- Non-IBM output device
that presents a hardcopy on microfilm.
-
microfilm setup resource
- A setup
file that contains information used to present AFP data on microfilm.
-
microfilm utility
- A non-IBM utility
that builds an object container for microfilm setup data and places it in
the AFP library.
-
microsecond
- A measurement of time:
one millionth of a second.
-
Microsoft Cluster Server (MSCS)
- A technology that provides high availability by grouping computers into MSCS
clusters. If one of the computers in the cluster hits any one of a range of
problems, MSCS shuts down the disrupted application in an orderly manner,
transfers its state data to another computer in the cluster, and re-initiates
the application there.
-
Microsoft Transaction Server (MTS)
- A facility that helps Windows users run business logic applications in a middle
tier server. MTS divides work up into activities, which are short independent
chunks of business logic.
-
Microsoft Windows
- Pertaining to a
Microsoft Corporation program that provides a graphical user interface for
DOS.
-
microswitch
- A switch operated by
the movement of some part of the machine.
-
MID
- See message
input descriptor.
-
middleware
- Software that acts as
an intermediate layer between applications or between client and server. It
is used most often to support complex, distributed applications in heterogeneous
environments.
-
middleware descriptor
- An XML file
that contains information about different middleware platform types, including
discovery sensor intervals and installation information.
-
MIDI
- See Musical
Instrument Digital Interface.
-
MIF
- See multiple
image facility.
-
migrate
- (1) To move data from one location
to another. See also migration level 1, migration level 2.
- (2) To install a new version or release of
a program to replace an earlier version or release.
- (3) To move complete
data volumes from one storage subsystem to another. See also hierarchical storage management.
- (4) To add or replace hardware
or software with models or releases of a different product.
- (5) To
move a product to a different platform, environment, or operating system.
-
migration control data set (MCDS)
- One of the control data sets (CDSs) in DFSMShsm. The MCDS is a Virtual Storage
Access Method (VSAM) key-sequenced data set (KSDS) that contains statistics
records, control records, user records, records for data sets that have migrated,
and records for volumes under the migration control of DFSMShsm. See also
control data set.
-
migration data host (MDH)
- A node
that acts as both an APPN end node and a type 5 subarea node.
-
migration level 1 (ML1)
- DFSMShsm-owned
direct access storage device (DASD) volumes that contain data sets migrated
from primary storage volumes. The data can be compressed. See also migrate, storage hierarchy, migration level 2, primary storage.
-
migration level 2 (ML2)
- DFSMShsm-owned
tape or direct access storage device (DASD) volumes that contain data sets
migrated from primary storage volumes or from migration-level-1 volumes. The
data can be compressed. See also migrate, storage hierarchy, migration level 1, primary storage.
-
migration policy
- A user-defined schedule
for moving objects from one storage class to the next. It describes the retention
and class transition characteristics for a group of objects in a storage hierarchy.
-
migrator
- A function of the resource
manager that checks migration policies and moves objects to the next storage
class when they are scheduled to move.
-
MIH
- See missing-interrupt
handler.
-
milestone
- A significant event in
a project that is used to determine progress toward goals.
-
millisecond
- A measurement of time:
1/1000 of a second.
-
MILNET
- The military network that
was originally part of ARPANET. It was partitioned from ARPANET in 1984. MILNET
provides a reliable network service for military installations.
-
MIME
- See Multipurpose
Internet Mail Extensions.
-
MIME type
- An Internet standard for
identifying the type of object being transferred across the Internet.
-
minidisk
- A direct access storage
device (DASD) or a logical subdivision of a DASD that has its own virtual
device number.
-
minimally managed node
- A node with
no Cluster Systems Management or Reliable Scalable Cluster Technology code
installed.
-
minimize
- A choice that reduces the
window to its smallest possible size and removes all the windows associated
with that window from the display.
-
minimum transaction level
- The level
of transaction services required for executing collaboration objects. Specified
as a property of a collaboration template during its development, and of a
collaboration object during its configuration, the transaction level for a
collaboration object cannot be lower than the level specified in its template.
See also compensation, transaction
level, transactional collaboration.
-
mining
- See harvesting.
-
mining base
- A repository where all
the information about the mining run settings and the corresponding results
is stored.
-
mining model
- The output of a data
mining function that describes patterns and relationships that are discovered
in historical data. A data mining model can be applied to new data for predicting
likely new outcomes.
-
minivolume
- In a z/OS system running
on z/VM, a z/OS-formatted z/VM minidisk whose size is equal to or less than
that of the physical volume. DFSMSdss uses the device size specified in the
volume table of contents (VTOC). Minivolumes are supported only by the system
version of DFSMSdss.
-
minor synchronization point
- In OSI,
a session-layer synchronization point that represents a less significant piece
of work than a major synchronization point. Minor synchronization points are
an unconfirmed service. See also major synchronization
point.
-
minor synchronize
- In OSI, a service
provided by the session layer that enables peer application entities to mark
recovery points in the flow of data being exchanged in case they need to resynchronize
the data stream. See also major synchronize.
-
minor tick
- In Business Graphics Utility,
one of the marks located between major ticks on an axis of a chart. See also
major tick.
-
MIP
- See Message
Integrity Protocol.
-
mirror copy
- In cross-site mirroring,
an independent disk pool that is being geographically mirrored so that it
is a replica of the production copy of the independent disk pool. If a switchover
or failover causes the system that owns the mirror copy to become the current
primary node, the mirror copy becomes the production copy of the independent
disk pool. The mirror copy has current data only when geographic mirroring
is active.
-
mirror copy data state
- In cross-site
mirroring, the current status of the data that is being geographically mirrored;
for example, insynch, usable, and unusable.
-
mirror copy state
- In cross-site mirroring,
the geographic mirroring state of the mirror copy; for example, active, resume
pending, resuming, and suspended.
-
mirrored pair
- Two units that contain
the same data and are referred to by the system as one logical unit.
-
mirrored protection
- A function that
protects data by duplicating all disk data in an auxiliary storage pool (ASP)
to another disk unit (mirrored unit) in the same ASP. If a disk failure occurs,
the system keeps running, using the operational mirrored unit of the mirrored
pair until the disk unit is repaired or replaced. See also checksum protection, device parity protection.
-
mirrored unit
- One half (one of the
units) of a mirrored pair of units.
-
mirroring
- (1) The process of writing
the same data to two disk units within the same auxiliary storage pool at
the same time. The two disk units become a mirrored pair, allowing the system
to continue when one of the mirrored units fails.
- (2) The process
of writing the same data to multiple disks at the same time. The mirroring
of data protects it against data loss within the database or within the recovery
log.
-
mirror task
- CICS task that services
incoming requests that specify a CICS mirror transaction (CSMI, CSM1, CSM2,
CSM3, CSM5, CPMI, CVMI, or a user-defined mirror transaction identifier).
-
mirror transaction
- CICS transaction
that recreates a request that is function shipped from one system to another,
issues the request on the second system, and passes the acquired data back
to the first system.
-
miscellaneous equipment specification (MES)
- A hardware change that is made after the time of the initial order.
-
missing-interrupt handler (MIH)
- An MVS and MVS/XA facility that tracks I/O interrupts. MIH informs the operator
and creates a record whenever an expected interrupt fails to occur before
a specified elapsed time is exceeded.
-
mixed-byte character set
- A set of
characters that contain both single-byte characters and double-byte characters.
For example, a file might contain characters from a single-byte coded character
set (such as code page 00290) and characters from a double-byte coded character
set (such as code page 00300).
-
mixed CCSID
- A mixed-byte (single
byte and double byte) encoding scheme. CCSID 05026 is an example of a mixed
CCSID. CCSID 05026 contains both single-byte code page 00290 and double-byte
code page 00300.
-
mixed character string
- A string containing
a mixture of single-byte and multibyte characters.
-
mixed chart
- In the GDDM function,
the combination of more than one type of chart in a business chart. For example,
the overlaying of a line chart on a bar chart.
-
mixed cluster
- A cluster with both
AIX and Linux nodes managed by a single management server.
-
mixed complex
- A global-resource-serialization
complex in which one or more of the systems in the global resource serialization
complex are not part of a multisystem sysplex.
-
mixed data
- In DB2 or i5/OS, data
that is associated with both a single-byte character set and a double-byte
character set.
-
mixed data string
- A character string
that can contain both single-byte and double-byte characters.
-
mixed list
- A list of unlike values
for a parameter that accepts a set of separately defined values. An example
of a mixed list is a list of user names that embeds another list. See also
simple list.
-
mixed-mode BMP
- An IMS batch messaging
program that has access to Fast Path and full-function databases.
-
Mixed Object Document Content Architecture (MO:DCA)
- (1) An IBM-architected, device-independent data stream for interchanging
documents.
- (2) The architecture that provides a single interface definition
allowing objects from different products to be interchanged so that the data
can be edited, presented, or manipulated by processes of varying characteristics
and intent.
-
Mixed Object Document Content Architecture-Presentation
(MO:DCA-P)
- A subset of MO:DCA that defines presentation documents.
-
mixed-pitch font
- A font that simulates
a proportionally spaced or typographic font. The characters are in a limited
set of pitches (for example, 10 pitch, 12 pitch, and 15 pitch).
-
mixed-release support
- An approach
to managing software delivery that makes it possible for IBM-supplied distribution
media to deliver entire (or parts of) licensed programs at existing releases
with or without a new release of i5/OS. Existing licensed programs that are
enabled for mixed releases but that have no new function are not rebuilt.
They are not renewed with a new release of the operating system. Similarly,
optionally installable parts of licensed programs that are enabled for mixed
releases are not rebuilt or are not renewed with each new release of its base
licensed program. Enabled licensed programs that remain at earlier releases
are compatible and function with the new release of the operating system.
-
mixed string
- A character string that
consists of both single-byte character set (SBCS) data and bracketed double-byte
character set (DBCS) data.
-
mixed traffic
- A function of the VTAM
class of service facility. Different kinds of traffic can be assigned to the
same virtual route, and, by selecting appropriate transmission priorities,
undue session interference can be prevented.
-
M-JPEG
- See Motion JPEG.
-
ML1
- See migration
level 1.
-
ML2
- See migration
level 2.
-
MLA facility
- See multilevel alias facility.
-
MLC
- See machine
level control.
-
MLD
- See media
library device.
-
MLPA
- See modified
link pack area.
-
MMDDYYYY
- Month-month-day-day-year-year
format of a date (for example 04281934 for 28 April 1934). This format can
be specified in the DATFORM system initialization parameter.
-
MNCRS
- See Mobile Network Computing Reference Specification.
-
MNCS
- See multinational
character set.
-
mnemonic
- A symbol or abbreviation
chosen to help the user remember the significance or meaning of the symbol.
For example, CRTUSRPRF is a mnemonic for the Create User Profile command.
-
mnemonic-name
- In COBOL, a user-defined
word that is associated in the Environment Division with a specific channel-name,
switch-name, or unit-name.
-
mobile application part (MAP)
- Optional
layer 7 application for SS7 that runs on top of TCAP for use with mobile network
applications.
-
Mobile Data Synchronization Protocol (MDSP)
- A protocol that defines the form of an XML document for data exchange.
Insertions, modifications, and deletions of items in a data store can be described
in MDSP documents.
-
Mobile Data Synchronization Service (MDSS)
- The ability to synchronize data on client devices with data stored in
an enterprise database. A common protocol has been developed that will eventually
allow a variety of clients to synchronize with a variety of databases.
-
mobile directory catalog
- A condensed
Directory Catalog set up on a Notes client.
-
Mobile Network Computing Reference Specification
(MNCRS)
- A specification that defines a set of standards for mobile
Java devices.
-
mobile satellite service (MSS)
- A
radiocommunication service between mobile earth stations and one or more space
stations, or between space stations used by this service.
-
mobile solutions terminal (MoST)
- The mobile terminal used by service personnel.
-
mobitex
- An open standard for sharing
information among mobile devices using radio transmission.
-
MOD
- See message
output descriptor.
-
MODB
- See major
object descriptor block.
-
MO:DCA
- See Mixed Object Document Content Architecture.
-
MO:DCA-P
- See Mixed Object Document Content Architecture-Presentation.
-
MO:DCA-P data
- Print data that has
been composed into pages. Text-formatting programs (such as DCF) can produce
composed text data consisting entirely of structured fields.
-
MO:DCA-P data definition
- A resource
containing a set of formatting controls for printing logical pages of data.
Includes controls for the number of lines per printed sheet, font selection,
and print direction, and for mapping individual fields in the data to position
on the printed sheets.
-
MO:DCA-P document
- Data composed entirely
of structured fields and containing a Begin Document structured field and
an End Document structured field.
-
mode
- (1) A method of operation in which
the actions that are available to a user are determined by the state or setting
of the system, program, or device.
- (2) In data communications, the
set of rules and protocols to be used for a session.
- (3) The processing
state of an activity. An activity can be in an initial, active, dormant (that
is, waiting for an event), cancelling, or complete mode.
- (4) A collection
of attributes that specifies a file's type and its access permissions.
-
mode-2 character
- In the GDDM function,
a graphics character (symbol), characterized by an unchanging size, constructed
from picture elements. See also mode-3 character.
-
mode-3 character
- In the GDDM function,
a graphics character (symbol), characterized by a variable size and shape,
constructed from lines and curves. See also mode-2
character.
-
mode conditioning patch
- A cable that
converts a single-mode signal generated by a longwave adapter into a light
signal that is appropriate for multimode fiber. A second mode-conditioning-patch
cable is required at the terminating end of the multimode fiber to return
the light signal to a single-mode signal for a longwave adapter.
-
mode description
- A system object
created for advanced-program-to-program communications (APPC) devices that
describes the session limits and the characteristics of the session, such
as the maximum number of sessions allowed, maximum number of conversations
allowed, the pacing value for incoming and outgoing request or response units,
and other controlling information for the session. The system-recognized identifier
for the object type is *MODD.
-
modegroup
- A VTAM LOGMODE entry, which
can specify (among other things) the class of service required for a group
of APPC sessions.
-
model
- A representation of a process,
system, or subject area, usually developed for understanding, analyzing, improving,
and replacing the item being represented. A model can include a representation
of information, activities, relationships, and constraints.
-
model ACL
- See default access control list.
-
model aspect
- A dimension of modeling
that emphasizes particular qualities of the metamodel. For example, the structural
model aspect emphasizes the structural qualities of the metamodel.
-
model configuration
- In System i Access,
the set of files, created by the System i Access administrator, that define
a set of common characteristics for a set of System i Access users. Model
configurations can be used as a base for defining user configurations.
-
model elaboration
- The process of
generating a repository type from a published model. Includes the generation
of interfaces and implementations which allows repositories to be instantiated
and populated based on, and in compliance with, the model elaborated.
-
model element
- (1) A subunit of a model.
- (2) An element that is an abstraction drawn from the system being
modeled. In the MOF specification, model elements are considered to be meta-objects.
See also view element.
-
model file
- In performance, a complete
representation of a system. It includes both the system configuration and
the set of workloads running on the configuration.
-
modeling convention
- A way to represent
concepts or to restrict the modeling language used in a project.
-
modeling time
- A time period during
the software development process in which design time and analysis time occur.
See also design time.
-
model output file
- A file that contains
sample output of a function.
-
model partitioning
- In UML modeling,
the act of dividing a model into several smaller models, often to help organize
work in a team development environment.
-
model queue object
- A set of queue
attributes that act as a template when a program creates a dynamic queue.
-
model research
- In the Reusable Asset
Specification (RAS), a representation of a system at a chosen level of abstraction
created in order to help understand the system's structure and operations.
-
model system
- A system that manages
the fix (PTF) levels for each of the systems in a network by comparing what
fixes are available on the model system with a specific endpoint system.
-
model view controller (MVC)
- A software
architecture that separates the components of the application: the model represents
the business logic or data; the view represents the user interface; and the
controller manages user input or, in some cases, the application flow.
-
modem (modulator-demodulator)
- A device
that converts digital data from a computer to an analog signal that can be
transmitted on a telecommunication line, and converts the analog signal received
to data for the computer.
-
mode name
- (1) The name used by the initiator
of a session to designate the class of service within the transport network
and the characteristics required for the session, such as traffic pacing values,
message-length limits, synchronization point and cryptography options.
- (2) A VTAM name for the collection of physical and logical characteristics
and attributes of a session.
-
moderated session
- A session for small
to medium-size classes that permits interaction between instructors and participants
and allows the option of a breakout session.
-
moderator
- The Sametime meeting participant
who conducts an online meeting.
-
modeset
- In CICS, a group of APPC
sessions. A modeset is linked by its modename to a modegroup (VTAM LOGMODE
entry) that defines the class of service for the modeset.
-
modifiable alternate PCB
- An alternate
PCB for which the destination can be changed by the application program during
execution. See also alternate program communication
block.
-
modification level
- A distribution
of additional function or fixes to a program since the previous release or
modification.
-
modified data tag (MDT)
- (1) An indicator,
associated with each input or output field in a displayed record, that is
automatically set on when data is typed into the field. The modified data
tag is maintained by the display file and can be used by the program using
the file.
- (2) In the attribute byte of each field in a BMS map, a
bit that determines whether the field should be transmitted on a READ MODIFIED
command (the command used by CICS for all except copy operations).
-
modified-default form definition
- A form definition that was the default specified in the PRINTDEV statement
of the PSF startup procedure, and that has been modified by the groupvalue
parameter of the COPIES parameter or by the FLASH parameter in the JCL statement.
-
modified-default page definition
- A page definition that was the default specified in the PRINTDEV statement
of the PSF startup procedure, and that has been modified by a font list specified
in any of the following: the CHARS parameter from the user JCL or the PRINTDEV
statement, the UCS parameter from the user JCL, and the JES default font in
the current printer setup.
-
modified frequency modulation (MFM)
- (1) Variation in the amplitude and frequency of the write signal.
- (2) Pertains to the number of bytes of storage that can be stored on the recording
media. Synonymous with double-density recording.
-
modified link pack area (MLPA)
- An
area of virtual storage containing reenterable routines from system data sets
that are to be part of the pageable extension of the link pack area (LPA)
during the current initial program load (IPL). See also pageable link pack area.
-
modified mode
- In storage management,
a backup copy group mode that specifies that a file is considered for incremental
backup only if it has changed since the last backup. A file is considered
a changed file if the date, size, owner, or permissions of the file have changed.
See also absolute mode.
-
modified standard DL/I application program
- An application program that uses CPI-C calls to allocate additional
LU 6.2 conversations to the same or different LU 6.2 devices, and sends and
receives data.
-
modify lock
- An L-lock or a P-lock
with a MODIFY attribute. A list of these active locks is kept at all times
in the coupling facility lock structure. If the requesting subsystem fails,
that subsystem's modify locks are converted to retained locks.
-
modular program design
- A design in
which multiple programs do a function (normally one program per function).
Modular program design applies to both batch and interactive processing.
-
modulation
- (1) The process by which a
characteristic of a carrier is varied in accordance with a characteristic
of an information-bearing signal.
- (2) The process by which a message
signal is impressed upon a carrier signal so that the carrier is altered to
represent the message signal.
-
modulator-demodulator
- See modem.
-
module
- (1) In the Integrated Language
Environment (ILE) model, the object that results from compiling source code.
A module cannot be run. To be run, a module must be bound into a program.
- (2) A program unit that is discrete and identifiable with respect
to compiling, combining with other units, and loading.
- (3) In programming
languages, a language construct that consists of procedures or data declarations
and that interact with other such constructs.
- (4) See program unit.
- (5) In Java EE programming, a software unit that
consists of one or more components of the same container type and one deployment
descriptor of that type. Examples include EJB, Web, and application client
modules. (Sun)
-
module map
- A listing of a program
module showing the length and module offset of each section.
-
module width
- In AFP Utilities, the
basic element width used in a bar code. The actual code element may be a module
width or a multiple of a module width.
-
modulo check
- A calculation performed
on values entered into a system by an operator. This calculation is designed
to detect most common typing errors.
-
modulus
- In communications, a number,
such as a positive integer, in a relationship that divides the difference
between two related numbers without leaving a remainder. For example, 9 and
4 have a modulus of 5 (9 - 4 = 5; 4 - 9 = -5; and 5 divides both 5 and -5
without leaving a remainder).
-
modulus 10 checking/modulus 11 checking
- (1) A method for verifying data.
- (2) Formulas used to calculate
the check digit for a self-check field.
-
MOEB
- See major
object environment block.
-
MOF
- (1) See Meta
Object Facility.
- (2) See Managed Object
Format.
-
monitor
- (1) An entity that performs measurements
to collect data pertaining to the performance, availability, reliability,
or other attributes of applications or the systems on which the applications
rely. These measurements can be compared to predefined thresholds. If a threshold
is exceeded, administrators can be notified, or predefined automated responses
can be performed.
- (2) In a privacy management environment, an entity
that checks PII-classified storage locations for attempts to submit data or
retrieve data.
- (3) In enterprise search, a user who has the authority
to observe collection-level processes.
- (4) A facility of the integration
test client that listens for requests and responses that flow over the component
wires or exports in the modules of a test configuration.
- (5) In performance
profiling, to collect data about an application from the running agents that
are associated with that application.
-
monitor component
- The autonomic manager
component that collects, aggregates, filters, manages and reports details
(metric properties, topologies, and so on) that were collected from managed
resources. See also managed resource, autonomic control loop.
-
Monitor control server
- In replication,
a database that contains the Monitor control tables, which store information
about alert conditions that the Replication Alert Monitor will monitor. See
also control server.
-
monitor details model
- A container
for monitoring contexts and their associated metrics, keys, counters, stopwatches,
triggers, and inbound and outbound events. The monitor details model holds
most of the monitor model information.
-
monitored application
- An application
that interfaces with a Tivoli Privacy Manager monitor to enable access to
monitored items that flow between the application and the monitored system.
See also monitored item.
-
monitored directory
- The directory
where the rapid deployment tools detect added or changed parts and perform
any necessary steps to produce an application that can run on WebSphere Application
Server. See also automatic application installation
project, free-form project.
-
monitored item
- A discrete item, such
as a data item, command, or attribute, that is associated with an owner and
that is received by a monitor. See also monitored application.
-
monitor element
- A data structure
that is used by the system monitor to store information about a particular
aspect of the database system status. Monitor elements collect data for one
or more logical data groups. Each monitor element collects one of the following
specific types of data: counter, gauge, watermark, textual information, or
timestamp. See also logical data group.
-
monitoring
- (1) The regular assessment
of an ongoing production system against defined thresholds to check that the
system is operating correctly. See also monitoring
domain.
- (2) Running a hardware or software tool to measure the
performance characteristics of a system.
-
monitoring agent
- The component of
the management center that periodically checks the health of the depot servers.
-
monitoring application
- An application
that observes and records the activity of specific applications or systems.
It typically monitors information such as available disk space or application
errors and compares the information to defined thresholds. When thresholds
are exceeded, the monitoring application can either notify an administrator
or respond automatically based on predefined rules.
-
monitoring collection
- A collection
of predefined monitors. Administrators can also use custom-developed or third-party
monitoring collections.
-
Monitoring Collection Specification Language
(MCSL)
- A proprietary programming language used to define monitoring
collections.
-
monitoring configuration
- A set of
monitoring options for a particular monitoring application. These options
are defined in the monitoring application, and are referenced by Tivoli Intelligent
Orchestrator to configure monitoring for devices.
-
monitoring context
- A definition that
corresponds to an object to be monitored, such as a process execution, an
ATM, a purchase order, or the stock level in a warehouse. At run time, monitoring
contexts process the events for a particular object.
-
monitoring control table (MCT)
- A
CICS table for the exclusive use of, in CICS Transaction Server, the monitoring
domain, and in CICS/VSE, the monitoring facility. See also event monitoring point.
-
monitoring domain
- In CICS Transaction
Server only, the CICS domain responsible for producing performance information
on each task. See also monitoring.
-
monitoring record
- Any of three types
of task-related activity record (performance, event, and exception) built
by the CICS monitoring domain in CICS Transaction Server only, or the CICS
monitoring program in CICS/VSE only. Monitoring records are available to the
user for accounting, tuning, and capacity planning purposes. See also exception class data, performance
class data, SYSEVENT class data.
-
monitoring schedule
- A schedule that
determines the days and times on which monitors collect data.
-
monitoring section descriptor
- The
section descriptor preceding each section of monitoring data written to the
journal file, and built at the beginning of each monitoring buffer.
-
monitoring section prefix
- A prefix
that precedes each section of monitoring data written to the journal. It is
built in an area immediately after the journal control area (JCA). CICS moves
it to the journal buffer immediately before the section descriptor.
-
monitoring task
- In the Activity Monitor,
a set of reports and filter settings that collects specific snapshot data
to troubleshoot applications or statements or to tune queries for optimal
use of database resources.
-
monitor mode
- In BSC, the mode during
which the communications adapter is looking for synchronization characters.
-
monitor model
- A model that describes
the business performance management aspects of a business model, including
events, business metrics, and key performance indicators (KPIs) that are required
for real-time business monitoring.
-
monitor qualifier
- A case-sensitive
character string that identifies an instance of a Replication Alert Monitor
process.
-
monitor switch
- A database manager
parameter that is manipulated by the user to control the type and quantity
of information that is returned in performance snapshots.
-
monocase table
- A table used to convert
lowercase letters to uppercase letters. The actual process of character conversion
is called monocasing.
-
monochrome
- Consisting of a single
color.
-
monoplex
- A sysplex consisting of
one system that uses a sysplex couple data set (CDS).
-
monospace
- (1) One space.
- (2) Referring to a character set that uses one space in a preset width for each
character.
-
monospaced font
- A font in which the
spacing of the characters does not vary.
-
monotonic
- Pertaining to an expression
or function whose set of all possible results preserves the order of the set
of inputs. An expression or function that is used to derive a generated column
and that is monotonically decreasing, increasing, nondecreasing, or nonincreasing
can increase functionality on tables organized by dimensions.
-
MO recording
- See magneto-optic recording.
-
morpheme
- The smallest unit of meaning
in a language. A word must consist of one or more morphemes. In English, the
word 'desks' has two morphemes: the root word 'desk' and the suffix 's', which
indicates plurality.
-
morphology
- The branch of linguistics
that studies the patterns of word formation.
-
morphosyntactic
- Pertaining to the
part of morphology that covers the relationship between syntax and morphology.
-
morphotactics
- The study of the characteristic
arrangement of morphemes in a sequence.
-
MoST
- See mobile
solutions terminal.
-
mostly global address space (MGAS)
- A flexible virtual address space model, used in systems such as HP-UX, that
preserves most of the address space for shared applications. This can enhance
performance for processes that share a lot of data. See also mostly private address space.
-
mostly private address space (MPAS)
- A flexible virtual address space model, used in systems such as HP-UX, that
can allocate larger address space blocks to processes. This can enhance performance
for processes that require a lot of data space. See also mostly global address space.
-
Motif
- User interface software, from
Open Systems Foundation, for use with the X Window System.
-
Motion JPEG (M-JPEG)
- Used for animation.
-
mount
- (1) To place a data medium in a
position to operate.
- (2) To make a file system accessible.
-
mounted
- Pertaining to a status where
the optical image associated with the selected image catalog entry is active
or loaded in the active virtual optical device. The mounted image is the currently
available optical image that can be seen by using the Work with Optical Volumes
(WRKOPTVOL) command. One optical image can be in mounted status at a time.
The installation software will start with this image during the installation
process.
-
mount handle data set
- In z/OS, a
data set used to store the file handles of Network File System (NFS) mount
points.
-
mount point
- (1) A logical drive through
which volumes are accessed in a sequential access device class. For removable
media device types, such as cartridges, a mount point is a logical drive associated
with a physical drive. For the file device type, a mount point is a logical
drive associated with an I/O stream.
- (2) In Linux operating systems
and in UNIX operating systems such as AIX, the directory at which a file system
is mounted and under which other file systems may be mounted.
- (3) A directory established in a workstation or a server local directory that
is used during the transparent accessing of a remote file.
-
mouse
- A device with one or more buttons
used to position a pointer on the display without using the keyboard. It allows
a user to select a choice or function to be performed or to perform operations
on the display, such as dragging or drawing lines from one position to another.
-
mouse button
- A mechanism on a mouse
that a user presses to select choices or start actions.
-
move mode
- A transmittal mode in which
the record to be processed is copied to or from a user work area. See also
locate mode.
-
move policy
- In Backup, Recovery,
and Media Services, a policy that defines the movement of media between or
among storage locations, and the length of time the media is to remain at
each location. After the move is specified in the move policy, the media is
returned to the user-specified home location. A move policy can be used with
any media policy.
-
moving-in volume
- A volume for which
a move into a bin has been started, but not yet confirmed.
-
moving-out volume
- A volume for which
a move out of a bin has been started, but not yet confirmed.
-
Moving Pictures Experts Group (MPEG)
- (1) A group that is working to establish a standard for compressing and storing
motion video and animation in digital form.
- (2) The standard developed
by the Moving Pictures Experts Group.
-
MPA
- See multiplexing
proxy agent.
-
MPAS
- See mostly
private address space.
-
MPC
- See multipath
channel.
-
MPDU
- See message
protocol data unit.
-
MPEG
- See Moving
Pictures Experts Group.
-
MPI
- See Message
Passing Interface.
-
MPICH
- A portable implementation of
the Message Passing Interface (MPI).
-
MPICH-GM
- A low-level message-passing
system for Myrinet networks.
-
MPL
- See mandatory
print labeling.
-
MPMT
- See multiprocess
multithread.
-
MPP
- (1) See massively
parallel processing.
- (2) See message processing
program.
-
MPS
- See multiple
port sharing.
-
MPTN
- See multiprotocol
transport networking.
-
MPTN access node
- A node that has
MPTN components installed, allowing transport users to use nonnative transport
providers.
-
MPTN connection
- An end-to-end connection
through the MPTN network that may traverse multiple networks running different
protocols. If the network consists of multiple MPTN segments, the MPTN connection
is formed by having MPTN transport gateways concatenate the MPTN segments
into one logical connection.
-
MPTN datagram
- A datagram that carries
an MPTN header as part of the data.
-
MPTN network
- A network consisting
of a mixture of native nodes, MPTN access nodes, MPTN address-mapper nodes,
and MPTN transport-gateway nodes. The resulting network has the appearance
to the user of one logical network. An MPTN network that consists of just
a single transport network does not contain an MPTN transport gateway.
-
MPTN-qualified transport address
- A transport address that is qualified by its corresponding address type. The
address conforms to the syntax and meaning of the specified address type.
An example of an MPTN-qualified transport address is the pair (type=SNA, transport
address=network-qualified LU name).
-
MPTN segment
- A connection across
a single-protocol transport network between an MPTN node (either an MPTN access
node or gateway node) and another node that may or may not be an MPTN node.
-
MPTN transport gateway
- An MPTN component
that concatenates two or more single-protocol networks to form an integrated
heterogeneous network.
-
MQA
- See MQ
Attachment.
-
MQAI
- See WebSphere
MQ Administration Interface.
-
MQ Attachment (MQA)
- A MERVA feature
that provides message transfer between MERVA and a user-written MQI application.
-
MQH
- See MQSeries
queue handler.
-
MQI
- See Message
Queue Interface.
-
MQI channel
- A connection between
a WebSphere MQ client and a queue manager on a server system. An MQI channel
transfers only MQI calls and responses in a bidirectional manner.
-
MQIsdp
- See SCADA device protocol.
-
MQLite
- A lightweight message queuing
facility that provides a subset of MQ Series functionality. MQLite transmits
Mobile Data Synchronization Protocol (MDSP) documents between the client and
the mid-tier server.
-
MQM
- See message queue management.
-
MQRFH
- An architected message header
that is used to provide metadata for the processing of a message. This header
is supported by MQSeries Publish/Subscribe SupportPac.
-
MQRFH2
- An extended version of MQRFH,
providing enhanced function in message processing.
-
MQS
- See MQSeries
nucleus server.
-
MQSC
- See WebSphere
MQ script command.
-
MQSeries
- A previous name for WebSphere
MQ.
-
MQSeries nucleus server (MQS)
- A MERVA
component that listens for messages on an MQI queue, receives them, extracts
a service request, and passes it via the request queue handler to another
MERVA ESA instance for processing.
-
MQSeries queue handler (MQH)
- A MERVA
component that performs service calls to the Message Queue Manager via the
provided Message Queue Interface.
-
MQT
- See materialized
query table.
-
MR indicator
- See matching record indicator.
-
MRJE
- See multileaving
remote job entry.
-
MRM
- See Message
Repository Manager.
-
MRM domain
- The message domain that
includes all messages that are modeled in the workbench. Message models can
be created to represent a wide range of message types, with one or more optional
physical formats. Messages in this domain are processed by the MRM parser.
See also BLOB domain, IDoc
domain, JMS domain, XML
domain.
-
MRM parser
- A program that interprets
a bit stream or tree that represents a message that belongs to the MRM domain,
and generates the corresponding tree from the bit stream on input, or bit
stream from the tree on output. Its interpretation depends on the physical
format that you have associated with the input or output message.
-
MRN
- See message
reference number.
-
MRO
- See multiregion
operation.
-
MRPD
- See machine-reported
product data.
-
MRR
- See Message
Reception Registry.
-
MS
- (1) See message
store.
- (2) See management services.
-
MSA
- See multiport
serial adapter.
-
MSC
- See Multiple
Systems Coupling.
-
MSC descriptor
- Descriptors used by
ETO to relate LTERMs to statically defined MSC links. See also ETO descriptor.
-
MSCS
- See Microsoft
Cluster Server.
-
MSD
- See main
storage dump.
-
MSDB
- See main
storage database.
-
MSF
- See mail
server framework.
-
MSG file
- In VisualAge RPG, a file
containing the application messages. The file is created from the message
source file during the make process.
-
MSHP
- See maintain
system history program.
-
MSN
- See message
sequence number.
-
MSS
- (1) See mobile
satellite service.
- (2) See managed software
system.
-
MSU
- See message
signal unit.
-
MT
- See message
type.
-
MTA
- See message
transfer agent.
-
MTBF
- See mean
time between failures.
-
MTF
- See Multitasking
Facility.
-
MTL
- See manual
tape library.
-
MTO
- See master
terminal operator.
-
MTP
- See message
transfer part.
-
MTS
- (1) See message
transfer system.
- (2) See macro temporary
store.
- (3) See Microsoft Transaction Server.
-
MTTR
- (1) See mean
time to recovery.
- (2) See mean time to repair.
-
MTU
- (1) See maximum
transmission unit.
- (2) See maximum transfer
unit.
-
MUID
- See message
unit identifier.
-
mu-law
- The compressing and expanding
algorithm used primarily in North America and Japan when converting from analog
to digital speech data. See also A-law.
-
multiaccess network
- A network in
which multiple devices can connect and communicate simultaneously.
-
multi-access spool complex
- See multi-access spool configuration.
-
multi-access spool configuration (MAS configuration)
- A multiple-processor complex that consists of two or more processors
at the same physical location, which share the same spool and checkpoint data
sets.
-
multi-adapter bridge
- A PCI bridge
resource in the I/O hardware which provides for the connection of PCI adapters
to the system PCI I/O bus. Each PCI adapter connected under a multi-adapter
bridge is controlled individually by the multi-adapter bridge. The multi-adapter
bridge number identifies a multi-adapter bridge on a given system PCI I/O
bus and is part of the Direct Select Address for a PCI I/O adapter. The bus
number and the multi-adapter bridge number together identify a unique multi-adapter
bridge in the system.
-
multi-adapter bridge function
- A function
that identifies a single PCI adapter card location under a multi-adapter bridge.
The multi-adapter bridge function number is part of the Direct Select Address
for a PCI I/O adapter. The multi-adapter bridge number and the multi-adapter
bridge function number together indicate a unique card location connected
to a given system PCI bus. The bus number and the multi-adapter bridge number
and the multi-adapter bridge function number together identify a unique PCI
I/O resource in the system.
-
multibyte character
- A mixture of
single-byte characters from a single-byte character set and double-byte characters
from a double-byte character set.
-
multibyte character set (MBCS)
- A
character set that represents single characters with more than a single byte.
See also double-byte character set, single-byte character set, Unicode.
-
multibyte control
- See escape sequence.
-
multicast
- Transmission of the same
data to a selected group of destinations. See also broadcast, unicast.
-
multicast address
- (1) A type of IP address
that identifies a group of interfaces and permits all of the systems that
are in that group to receive the same packet of information.
- (2) See group address.
-
Multichannel Sales Center
- A WebSphere
Commerce enhancement that provides an application view to support inbound
call center activities.
-
multicharacter collating element
- A sequence of two or more characters that collate as an entity. For example,
in some coded character sets, an accented character is represented by a non-spacing
accent, followed by the letter. Other examples are the Spanish elements ch
and ll. X/Open.
-
multiconnection server
- See concurrent server.
-
multicultural support
- In computing, the ability of a single software solution to be translatable and to support the cultural conventions of multiple languages and geographic regions. Cultural conventions include the use of various writing systems, sort orders, different formats for date, time, numbers, and currency, and different keyboard layouts.
-
multidimensional
- In the DB2 OLAP
Server, pertaining to a method of referencing data through three or more dimensions.
An individual data value in a fact table is the intersection of one member
from each dimension. See also business dimension.
-
multidimensional analysis
- The process
of assessing and evaluating an enterprise on more than one level. See also
business dimension.
-
multidimensional clustering table (MDC table)
- A table whose data is physically organized into blocks along
one or more dimensions, or clustering keys, specified in the ORGANIZE BY DIMENSIONS
clause.
-
multidirectional replication
- In Q
replication, a replication configuration that includes peer-to-peer or bidirectional
replication.
-
multi-factor authentication
- A protected
object policy (POP) that forces a user to authenticate using two or more levels
of authentication. For example, the access control on a protected resource
can require that the users authenticate with both user name/password and user
name/token passcode. See also protected object policy.
-
multifunction IOP (MFIOP)
- A system
processor that as a unit contains more than one processor function such as
a diskette controller, a storage device controller, and a communications controller.
See also combined function IOP.
-
multifunction monitor (MFM)
- The master
dispatcher. The MFM scans the function control table (FCT) for dynamic support
programs (DSPs)that are ready to be started and runs them.
-
multihomed host
- In the Internet Protocol
(IP), a host that is connected to more than one network.
-
multihoming
- For TCP/IP, the ability
to specify multiple interfaces per line description. The system can have multiple
hosts on the same network over the same communications line or multiple hosts
on different networks over the same communications line.
-
multi-hop
- To pass through one or
more intermediate queue managers when there is no direct communication link
between a source queue manager and the target queue manager.
-
multileaving remote job entry (MRJE)
- The fully synchronized, two-directional transmission of a variable number
of data streams between two computers using binary synchronous communications.
-
multilevel alias facility (MLA facility)
- A function that allows catalog specification based on one to four data-set
name qualifiers.
-
multilevel security
- A security policy
that allows the classification of data and users based on a system of hierarchical
security levels combined with a system of non-hierarchical security categories.
The system imposes mandatory access controls restricting which users can
access data based on a comparison of the classification of the users and the
data.
-
multilevel wildcard
- A wildcard that
can be specified in subscriptions to match any number of levels in a topic.
-
multilingual support
- Support that
includes more than one national language on a system.
-
multimedia
- Material presented in
a combination of text, graphics, video, animation, and sound.
-
multimedia file system
- A file system
that is optimized for the storage and delivery of video and audio.
-
multi-modal
- Pertaining to a system
that operates using multiple interfaces (e.g. both text and speech). Multi-modal
paradigm user interfaces (MMUIs) will be used in next-generation devices to
allow interaction via voice, touch and keyboard input.
-
multimode optical fiber
- A type of
optical fiber that incorporates shortwave lasers and that is used with gigabaud
link modules. Typically, multimode fiber is used for links of up to 500 m
(1640.42 ft). See also single-mode optical fiber.
-
multi-MVS environment
- A physical
processing system that is capable of operating more than one MVS image. See
also MVS image.
-
multinational character set (MNCS)
- A set of graphic characters that support the languages within a specific language
group. On i5/OS, character set 697 and code page 500 are implied when speaking
about the MNCS.
-
multipart message
- A message that
contains one or more other messages within its structure. The contained message
is sometimes referred to as an embedded message.
-
multipath channel (MPC)
- A channel
protocol that uses multiple unidirectional subchannels for VTAM-to-VTAM bidirectional
communication.
-
multipayment framework
- In WebSphere
Commerce, the structure that allows for different merchant servers using different
payment systems to issue the same generic commands and use the same generic
data. Also known as WebSphere Commerce Payments (formerly called Payment Manager).
-
multiple allegiance
- An ESS hardware
function, independent of software support, that enables multiple system images
to concurrently access the same logical volume (LVOL) on the ESS as long as
the system images are accessing different extents. See also extent, parallel access volume, I/O Priority Queueing.
-
multiple area data set (MADS)
- Multiple
data sets that contain shadow copies of DEDB areas. See also area data set.
-
multiple-area structure
- In a data-sharing
environment, a coupling facility structure that contains more than one VSO
DEDB area. See also single-area structure.
-
multiple axis chart
- In the GDDM function,
a chart in which more than one horizontal or vertical axis, or both, are used.
-
multiple bar chart
- In the GDDM function,
a form of bar chart in which the bars at a given horizontal axis value are
placed side by side. See also composite bar chart, floating bar chart.
-
multiple chart
- In the GDDM function,
two or more charts appearing together on the work station or page. Multiple
charts can be of the same type or different types and can be constructed from
one or more sets of data.
-
multiple chip module (MCM)
- The fundamental,
processor, building block of IBM System p servers.
-
multiple-choice selection field
- A field that contains a fixed number of choices arranged in a list in which
one or more selections can be made.
-
multiple-choice selection list
- A
field that contains a potentially scrollable list of choices in which one
or more selections can be made.
-
multiple classification
- A semantic
variation of generalization in which an object may belong directly to more
than one class. See also dynamic classification.
-
multiple configuration instances
- More than one instance of a product running in the same machine at the same
time.
-
multiple console support (MCS)
- A
feature of MVS that permits selective message routing to multiple consoles.
-
multiple device file (MDF)
- (1) A device
file in which the maximum number of program devices is greater than one.
- (2) In RPG, any work station (WORKSTN) file with one of the keywords ID,
IND, NUM, or SAVDS. Such a file can access more than one device, and devices
of various types.
-
Multiple Digital Trunk Processor
- The IBM 9295 Multiple Digital Trunk Processor. The combination of a number
of digital signal processing cards and supporting equipment that provides
high-level voice compression, high voice quality, and digital telephone signaling
functions (transmit and receive) via an external shielded cable to an attached
IBM RS/6000 computer. See also Single Digital Trunk
Processor.
-
multiple-entry font
- A font with multiple
entries in the Map Coded Font (MCF) structured field. The only fonts that
have multiple entries are double-byte fonts that are defined dynamically.
(The MCF points directly to a set of code page and font character set pairs.)
See also single-entry font.
-
multiple extended remote copy (MXRC)
- An enhancement to extended remote copy (XRC) that allows up to five XRC sessions
to run within a single logical partition (LPAR).
-
multiple-file format
- In DFSMShsm,
a tape format that requires a unique, standard-label data set for each user
data set written. When DFSMShsm writes in multiple-file format, it writes
one, tape data set for every user data set to all tape migration and backup
volumes.
-
multiple image facility (MIF)
- A facility
that allows channels to be shared among Processor Resource/Systems Manager
(PR/SM) logical partitions in an ESCON environment.
-
multiple inheritance
- (1) An object-oriented
programming technique implemented in C++ through derivation, in which the
derived class inherits members from more than one base class.
- (2) A semantic variation of generalization in which a type may have more than
one supertype. See also single inheritance.
-
multiple-line entry field
- In VisualAge
RPG, an entry field that allows the user to enter multiple lines of text.
-
multiple logical partitions
- A partitioned
database environment with multiple database partition servers installed on
one computer.
-
multiple message mode
- A processing
mode in which synchronization points occur only at DL/I CHKP calls or application
termination. See also message mode, single message mode.
-
multiple mirror situation
- A transaction
condition that can arise in an intercommunication environment. When a transaction
accesses resources in more that one remote system, the intercommunication
component of CICS invokes a mirror transaction in each system to execute requests
for the application program. When the application program reaches a syncpoint,
the intercommunication component exchanges syncpoint messages with those mirror
transactions that have not yet terminated (if any).
-
multiple occurrence data structure
- In RPG, a data structure that appears more than once in a program.
-
multiple-occurrence mapping
- A form
of mapping in which all occurrences of a repeating compound or simple element
are mapped to the same repeating compound or simple element in another document.
-
multiple port sharing (MPS)
- An arrangement
for short-hold mode operation in which both the first call and a reconnection
call (recall) for a population of DTEs are directed to any available port
within a port group.
-
multiple-selection field
- In System
i Access, a list from which a user can choose one or more items.
-
Multiple Systems Coupling (MSC)
- An IMS facility that permits geographically dispersed IMS systems to communicate
with each other. See also IMSplex.
-
multiple up
- The printing of more
than one page on a single surface of a sheet of paper.
-
multiple value list
- A set of descriptive
values from which a user can select more than one.
-
Multiple Virtual Storage (MVS)
- An
IBM operating system that accesses multiple address spaces in virtual storage.
See also Base Control Program.
-
Multiple Virtual Storage/Enterprise Systems Architecture
(MVS/ESA)
- See z/OS.
-
multiplex
- To simultaneously transmit
two or more messages on a single channel.
-
multiplexed device
- A device that
takes several input signals and combines them into a single output signal
so that each of the input signals can be recovered.
-
multiplexed distribution
- The mechanism
used by Tivoli Enterprise applications to transfer data to multiple targets.
Tivoli Management Framework provides two multiplexed distribution services,
MDist and MDist 2.
-
multiplexer
- (1) See multiplexed device.
- (2) A device that takes several input signals
and combines them into a single output signal in such a manner that each of
the input signals can be recovered. (T)
-
multiplexer channel
- A channel designed
to operate with a number of I/O devices simultaneously. Several I/O devices
can transfer records at the same time by interleaving items of data.
-
multiplexing
- (1) In OSI, the technique
of using a single network connection by multiple Transport Layer connections
so that multiple associations can share the same line. Multiplexing is available
only for transport classes 2 and 4.
- (2) In data transmission, a function
that permits two or more data sources to share a common transmission medium
so that each data source has its own channel.
-
multiplexing proxy agent (MPA)
- A
gateway that accommodates multiple client access. These gateways are sometimes
known as Wireless Access Protocol (WAP) gateways when clients access a secure
domain using a WAP. Gateways establish a single authenticated channel to the
originating server and tunnel all client requests and responses through this
channel.
-
multiplicity
- A specification of the
range of allowable cardinalities that a set may assume. Multiplicity specifications
may be given for roles within associations, parts within composites, repetitions,
and other purposes. Essentially a multiplicity is a (possibly infinite) subset
of the non-negative integers. See also cardinality.
-
multipoint
- In data communications,
pertaining to a network that allows two or more stations to communicate with
a single system on one line.
-
multipoint control unit (MCU)
- A device
that supports video meetings between three or more participants. The MCU is
composed of a multipoint controller (MC) and a multimedia processor (MP).
-
multipoint line
- A line or circuit
connecting several stations. See also point-to-point
line.
-
multipoint network
- More than two
devices sharing the same transmission line at the same time. See also point-to-point network.
-
multiport serial adapter (MSA)
- An
adapter on the ESS Master Console that has multiple ports to which ESSs can
be attached.
-
multiprocessing
- Simultaneous processing
by multiple central-processing units.
-
multiprocess installation
- The process
of installing two or more licensed programs at the same time.
-
multiprocess multithread (MPMT)
- A process architecture of the IBM HTTP Server that supports multiple processes
as well as multiple threads per process.
-
multiprocessor
- A processor complex
that has more than one central processor.
-
multiprogramming
- The concurrent execution
of two or more computer programs by a computer.
-
multiprotocol transport networking (MPTN)
- A networking architecture that allows application programs using common
upper-layer protocols and expecting the same transport services to communicate
over transport networks that may use protocols different from the transport
network the programs were designed to use. For example, socket application
programs that were originally designed to communicate over a TCP/IP transport
network can, using MPTN support, communicate over an SNA transport network.
-
Multipurpose Internet Mail Extensions (MIME)
- An Internet standard that allows different forms of data including
video, audio, or binary data to be attached to e-mail without requiring translation
into ASCII text.
-
multiregion operation (MRO)
- Communication
between CICS systems in the same processor without the use of SNA network
facilities. This allows several CICS systems in different regions to communicate
with each other, and to share resources such as files, terminals, temporary
storage, and so on. See also CICSplex.
-
multisite update
- Distributed relational
database processing in which data is updated in more than one location within
a single unit of work. See also transaction.
-
multistation access unit (MAU)
- In
the IBM Token-Ring Network, a wiring concentrator that can connect up to eight
lobes to a ring.
-
multisystem application
- (1) An application
program that has various functions distributed across MVS systems in a multisystem
environment.
- (2) In XCF, an authorized application that uses XCF coupling
services.
-
multisystem cascaded transaction
- A sequence of transactions across multiple systems in a sysplex that are coordinated
by Resource Recovery Services (RRS).
-
multisystem environment
- An environment
in which two or more systems reside on one or more processors, and one or
more processors can communicate with programs on the other systems.
-
multisystem sysplex
- A sysplex in
which two or more MVS images can be initialized as part of the sysplex.
-
multi-tailed
- Describing a disk that
is connected to multiple nodes.
-
multitasking
- A mode of operation
in which two or more tasks can be performed at the same time.
-
Multitasking Facility (MTF)
- A facility
provided separately by C and by Fortran to improve turnaround time on multiprocessor
configurations. MTF is provided by C library functions or by Fortran callable
services.
-
multithread
- (1) Pertaining to a process
that has multiple active threads.
- (2) Pertaining to concurrent operation
of more than one path of execution within a computer.
-
multithread capable
- See multithread.
-
multithreaded
- Pertaining to the description
of a program that is designed to have parts of its code run concurrently.
-
multithreading
- A mode of operation
in which the operating system can run different parts of a program, called
threads, simultaneously.
-
multithread test
- In CICS, this type
of test involves several concurrently active transactions. Whether the new
function can coexist with other related functions is tested. See also single-thread test.
-
multi-tiered application
- An application
that is deployed on more than one physical machine. A client/server application
is a common multitiered application in which there are two tiers: the client
tier (for example, the presentation and the graphical user interface) and
the server tier (for example, the service and the database).
-
multi-tier replication
- In replication,
a replication configuration in which changes are replicated from a replication
source in one database to a replication target in another database, and changes
from this replication target are replicated again to a replication target
in another database. See also peer-to-peer replication, update-anywhere replication.
-
multivalued
- Pertaining to a model
element with multiplicity defined whose Multiplicity Type:: upper attribute
is set to a number greater than one. The term multi-valued does not pertain
to the number of values held by an attribute, parameter, and so on at any
point in time. See also single-valued.
-
multiversion file system (MVFS)
- A file system that supports dynamic views.
-
multivolume file
- A file that occupies
more than one diskette or tape.
-
multi-VSE environment
- (1) An environment,
in one or more CECs, that supports more than one VSE image. See also VSE image.
- (2) A physical processing system (such as an IBM 3090)
that is partitioned into one or more processors, where each processor is capable
of running under the control of a single VSE operating system.
- (3) A physical processing system, using the processor resource/systems manager
(PR/SM), divided into multiple logical partitions, with each logical partition
(LP) operating a copy of VSE. See also Processor Resource/Systems
Manager.
-
multiword expression (MWE)
- A semantically
or syntactically significant expression that consists of multiple words that
expresses a single concept. Multiword expressions can be phrasal in nature,
comprising several sentence elements, for example: 'kick the bucket'. When
compared to a regular sequence of words, multiword expressions does not decompose
the meaning of each lexical unit in the phrase. For example, 'pass the buck'
is a multiword expression with a single concept, whereas 'pass the salt' is
a regular occurrence of three single lexical units. See also compound word, solid compound.
-
multiword format dictionary
- A dictionary
that permits the use of support dictionaries to convert each word that is
encountered in a text into its lemma. The lemma form is then looked up in
the multiword format dictionary, which is useful for defining inflected terms.
-
multiword unit (MWU)
- A group of words,
usually found in sequence, that are mechanically recognized in text without
regard to sentence structure, and annotated. A multiword unit may or may not
constitute a multiword expression (MWE), and may consist of one word for the
uniformity of data development. LanguageWare provides separate domain term
dictionaries containing multiword units.
-
mumble
- Non-speech noise that a user
interjects while speaking.
-
Musical Instrument Digital Interface (MIDI)
- A protocol that allows a synthesizer to send signals to another synthesizer
or to a computer, or a computer to a musical instrument, or a computer to
another computer.
-
music channel
- A channel on which
sounds can be broadcast to one or more telephony (voice) channels.
-
music title
- The name by which WebSphere
Voice Response knows a tune.
-
mutator method
- A method that an object
provides to define the interface to its instance variables. See also getter method, setter method, accessor method.
-
mutex
- See mutual exclusion.
-
mutex attribute object
- A type of
attribute object with which a user can manage mutual exclusion (mutex) characteristics
by defining a set of variables to be used during its creation. A mutex attribute
object eliminates the need to redefine the same set of characteristics for
each mutex object created. See also mutual exclusion.
-
mutex object
- (1) An identifier for a
mutual exclusion (mutex).
- (2) A means of coordinating access to a
shared resource so that it cannot be used by more than one thread or process
at a time. Mutex is short for mutually exclusive.
-
mutual exclusion (mutex)
- (1) A synchronization
function that is used to allow multiple jobs or processes to serialize their
access to shared data.
- (2) An abstraction that enables two or more
threads to cooperate in a mutual exclusion protocol providing safe access
to shared resources.
- (3) A flag used by a semaphore to protect shared
resources. The mutex is locked and unlocked by threads in a program. See also
mutex attribute object.
-
mutual exclusion lock
- A lock that
excludes all threads other than the lock holder from any access to the locked
resource.
-
MVC
- See model
view controller.
-
MVFS
- See multiversion
file system.
-
MVS
- See Multiple
Virtual Storage.
-
MVS configuration program (MVSCP)
- See hardware configuration definition.
-
MVSCP
- See MVS configuration program.
-
MVS/Data Facility Product (MVS/DFP)
- A major element of MVS, including data access methods and data administration
utilities.
-
MVS/DFP
- See MVS/Data Facility Product.
-
MVS/ESA
- See Multiple Virtual Storage/Enterprise Systems Architecture.
-
MVS/ESA extended nucleus
- A major
element of MVS/ESA virtual storage. This area duplicates the MVS/ESA nucleus
above the 16MB line. See also MVS/ESA nucleus.
-
MVS/ESA nucleus
- A major element of
MVS/ESA virtual storage. This static storage area contains control programs
and key control blocks. The area includes the nucleus load module and is of
variable size, depending on the installation's configuration. The nucleus
is duplicated above the 16MB line as the MVS/ESA extended nucleus. See also
MVS/ESA extended nucleus.
-
MVS image
- A single occurrence of
the MVS operating system that has the ability to process work. See also multi-MVS environment, single-MVS
environment.
-
MVS router
- A system service that
provides a focal point and a common system interface for all products providing
resource control. The MVS router is always present, regardless of whether
RACF is present.
-
MWE
- See multiword
expression.
-
MWI
- See message
waiting indicator.
-
MWU
- See multiword
unit.
-
MXRC
- See multiple
extended remote copy.
-
MX record
- See mail exchange record.
|
|
|
|
-
N
- See newton.
-
n-1
- The immediately preceding release
of the operating system.
-
NAB
- See next
available byte.
-
NACK
- See negative
acknowledgment reply.
-
NACP
- See node
abnormal condition program.
-
NAICS
- See North American Industry Classification System.
-
NAK character
- See negative acknowledgment character.
-
name
- In C++, an identifier. Syntactically,
a name can be an operator function name, a conversion function name, a destructor
name, or a qualified name.
-
name aliasing
- During EGL generation,
a name that is placed in the output source file instead of a name that was
in the EGL source code. In most cases, the original name is aliased because
it was not valid in the target generation language.
-
name-and-password authentication
- A security mechanism that is used by Internet protocols over TCP/IP and SSL.
During name-and-password authentication, the client sends a text password
to the server. The server verifies the identity of the client by confirming
that the password that was sent matches the password that is stored on the
server.
-
named constant
- In RPG, a name representing
a specific value that does not change during the running of the program.
-
named element
- A specific design element
in a Notes database -- for example, a view or folder.
-
named entity
- See domain term.
-
named heap
- A heap that was defined
after the initial heap was provided by Language Environment. Named heaps have
identifiers associated with them.
-
named mutex
- A mutual exclusion lock
that has a text name associated with it for identification and debugging purposes.
-
named-object table
- A table that maps
names to associated notes and objects; for example, a table that manages per-user
unread lists.
-
named pipe
- A pipe that an application
opens by name in order to write data into or read data from the pipe. Using
a named pipe facilitates communication between a sending process and a receiving
process.
-
named style
- A collection of styles
that users can apply to other data in a file. Styles stored in a named style
can include number format, typeface, type size, underlining, bold, italics,
lines, colors, and alignment.
-
named type
- A collection of System
i resource types that are either object types or member types.
-
namelist
- A WebSphere MQ object that
contains a list of names, for example, queue names.
-
name pattern
- In CoOperative Development
Environment/400, a set of criteria used to display a list of VM files, MVS
data set names, or i5/OS objects.
-
name scope
- The portion of an application
within which a particular declaration of external data applies or is known.
-
name server
- (1) In networking, the server
that converts network names to addresses.
- (2) In a fibre-channel network,
the server that contains the worldwide identifiers (WWIDs) of all addressable
nodes on the network.
-
name service
- In WebSphere MQ on UNIX
systems and WebSphere MQ for Windows, the facility that determines which queue
manager owns a specified queue.
-
name service handle
- In the Distributed
Computing Environment Remote Procedure Call (RPC), a reference to the context
used by the series of next operations called during a specific name service
interface (NSI) search or inquiry.
-
name service interface (NSI)
- (1) In DCE
Remote Procedure Call (RPC), a part of the application programming interface
(API) of the RPC run time. NSI routines access a name service, such as the
Cell Directory Service (CDS), for RPC applications.
- (2) The WebSphere
MQ interface to which customer- or vendor-written programs that resolve queue-name
ownership must conform. A part of the WebSphere MQ Framework.
-
namespace
- (1) Space reserved by a file
system to contain the names of its objects.
- (2) In XML and XQuery,
a uniform resource identifier (URI) that provides a unique name to associate
with the element, attribute, and type definitions in an XML schema or with
the names of elements, attributes, types, functions, and errors in XQuery
expressions.
- (3) A part of the model in which the names may be defined
and used. Within a namespace, each name has a unique meaning.
- (4) A category used to group similar types of identifiers. See also namespace scope.
- (5) The scope within which a Common Information
Model (CIM) schema applies.
- (6) The set of all possible names composed
of characters from the binder's character set, within which no duplicates
are allowed. All external symbols have an assigned name space during binder
processing and within program objects.
- (7) A logical container in
which all the names are unique. The unique identifier for an artifact is composed
of the namespace and the local name of the artifact.
-
namespace object
- A Data Interchange
Services object that contains information about an XML namespace and assists
the translator in being namespace aware when translating a source document
to an XML document.
-
namespace prefix
- The portion of a
qualified name that is mapped to a URI reference and serves as a proxy for
a URI reference in a qualified name.
-
namespace scope
- A user-defined, abstract
scope in which identifiers are visible only when the code explicitly includes
the desired namespace. See also class scope, local scope, namespace, scope, global scope.
-
name test
- A node test that consists
only of a QName or a wildcard. See also node test.
-
name transformation
- In WebSphere
MQ on UNIX systems and WebSphere MQ for Windows, an internal process that
changes a queue manager name so that it is unique and valid for the system
being used. Externally, the queue manager name remains unchanged.
-
name translation
- In SNA network interconnection,
the conversion of logical unit names, logon mode table names, and class-of-service
names that are used in one network to equivalent names for use in another
network.
-
name type
- A 1-byte number from 1
to 255 that the client specifies as the first byte of the resource ID. The
name type guarantees uniqueness of names for all resources of that name type.
This uniqueness prevents clients from putting more than one resource with
the same name and name type out on the resource structure. The resources
within the name type can have different data resource types.
-
name-value pair
- A parameter containing
a name and a value in the format name=value.
-
name vital-record specification
- A vital record specification used to define additional retention and movement
policy information for data sets or volumes.
-
naming
- An operation that is used
by clients of WebSphere Application Server applications to obtain references
to objects related to those applications.
-
naming authority
- In OSI, an organization
that assigns OSI names and addresses--such as abstract syntax names, application
context names, network entity titles, and NSAP addresses--to ensure that they
are unique.
-
naming context
- A logical namespace
containing name and object bindings.
-
naming federation
- The process of
binding naming systems so that the aggregate system can process composite
names that span the naming systems.
-
naming service
- An implementation
of the Java Naming and Directory Interface (JNDI) standard.
-
NAMPS
- See Narrowband Advanced Mobile Phone Service.
-
NaN
- See not-a-number.
-
Narrowband Advanced Mobile Phone Service (NAMPS)
- A standard that combines cellular voice processing with digital
signaling, increasing the capacity of Advanced Mobile Phone Service (AMPS)
systems and adding functionality.
-
narrow character
- An element of type
char that, when processed sequentially, can represent text. See also wide character.
-
n-ary association
- An association
among three or more classes. Each instance of the association is an n-tuple
of values from the respective classes. See also binary
association.
-
NAS
- See network-attached
storage.
-
NAS node
- A client node that is a
network-attached storage (NAS) file server. Data for the NAS node is transferred
by a NAS file server that is controlled by the network data management protocol
(NDMP). A NAS node is also called a NAS file server node.
-
NAT
- (1) See network
address translation.
- (2) See nodes attached
table.
-
NAT conversation
- A relationship between
any of the following IP addresses and port numbers: (1) private source IP
address and source port number (without NAT), (2) public (NAT) source IP address
and public (NAT) source port number, (3) destination IP address and port number
(an external network).
-
national
- In U.S. EBCDIC, the three
characters represented by X'7C', X'7B' and X'5B'; these values produce, respectively,
the at sign (@), the number sign (#), and the dollar sign ($). On many keyboards
and display screens in other countries, these hex values are displayed differently.
-
National Institute of Standards and Technology
(NIST)
- A U.S. government agency that supports industry, commerce,
scientific institutions, and all branches of U.S. Government in advancing
measurement science and developing standards. NIST was formerly known as the
National Bureau of Standards (NBS). See also Federal
Information Processing Standard.
-
National ISDN
- A common ISDN standard
developed for use in the U.S.
-
national language
- See language load identification.
-
national language dependent function (NLDF)
- Any function of a hardware or software product that must be altered
to suit a country, region, or language. Examples include date and time formats,
monetary values, keyboards, measurement systems, and character data functions
(such as sorting). See also national language support, national language version.
-
National Science Foundation (NSF)
- A United States government agency that is a sponsor of the National Science
Foundation Network (NFSNET).
-
National Science Foundation Network (NSFNET)
- A collection of local and regional networks in the United States
that are connected by a high-speed backbone. NSFNET provides scientists access
to a number of supercomputers across the country.
-
National Telecommunications and Information Administration
(NTIA)
- The United States government's authority on spectrum management.
-
National Television Standard Committee (NTSC)
- A committee that sets the standard for color television broadcasting
and video in the United States (currently in use also in Japan).
-
native
- Pertaining to the relationship
between a transport user and a transport provider that are both based on the
same transport protocol.
-
native attribute
- A characteristic
of an object that is managed on a specific content server and that is specific
to that content server. For example, the key field 'policy num' might be a
native attribute in a Content Manager content server, whereas the field policy
ID might be a native attribute in a Content Manager OnDemand content server.
-
native character set
- In COBOL, the
default character set associated with the computer specified in the OBJECT-COMPUTER
paragraph.
-
native collating sequence
- In COBOL,
the default collating sequence associated with the computer specified in the
OBJECT-COMPUTER paragraph.
-
native context
- A work context that
is associated with a single application task.
-
native entity
- An object that is managed
on a specific content server and that is comprised of native attributes. For
example, Content Manager index classes are native entities comprised of Content
Manager key fields.
-
native launcher
- The executable file
that starts an installation, upgrade, or uninstallation program on a specific
platform.
-
native mode
- A programming model that
uses elements of the Common Information Model to gather data that is used
to create the dynamic model of a new resource model.
-
native SQL procedure
- An SQL procedure
that is processed by converting the procedural statements to a native representation
that is stored in the database directory, as is done with other SQL statements.
When a native SQL procedure is called, the native representation is loaded
from the directory, and DB2 executes the procedure. See also external procedure, external SQL procedure.
-
native start endpoint
- A server platform
on which native start jobs can run as part of a grid job. See also grid job, native start job.
-
native start job
- A program that can
run as a background command on UNIX or Windows systems. Native start jobs
can run across multiple programming and component models. Native applications
can be implemented in Java, native-compiled languages, such as C++ and COBOL,
and scripts. See also native start endpoint.
-
native text index
- An index of the
text items that are managed on a specific content server. For example, a single
text search index on a Content Manager content server.
-
natural language
- Human language,
as opposed to the artificial languages used in computer programming.
-
natural language processing (NLP)
- A field of artificial intelligence and linguistics that studies the problems
inherent in the processing and manipulation of natural language, with an aim
to increase the ability of computers to understand human languages.
-
natural reentrancy
- The attribute
of applications that contain no static external data and do not require additional
processing to make them reentrant. See also constructed
reentrancy.
-
NAU
- See network
addressable unit.
-
NAUN
- See nearest
active upstream neighbor.
-
navigation bar
- A set of links to
other Web pages in a Web site. For example, navigation bars are usually located
across the top or down the side of a page and contain direct links to the
major sections within the Web site.
-
navigation button
- A button that is
used to navigate among open databases or Web pages. Button functions include
back, forward, stop, refresh, search, and go.
-
navigation pane
- The pane that either
displays icons for all views, folders, and agents in a Notes database or displays
the current navigator.
-
navigator
- Programmed graphics in
the user interface that direct users to specific parts of a Notes database
without their having to open views. Navigators usually include hotspots and
can do simple actions such as opening a database, document, URL, view, folder,
or another navigator.
-
NaviQuest
- A DFSMSdfp component for
implementing, verifying, and maintaining a DFSMS storage management subsystem
(SMS) environment in batch mode. NaviQuest is the batch equivalent of Interactive
Storage Management Facility (ISMF). It provides batch testing and reporting
capabilities that can be used to automatically provide these functions: create
test cases in bulk; run many other storage management tasks in batch mode;
and use supplied, access method services (ACS), code fragments as models when
creating ACS routines.
-
NBBS
- See Networking
Broadband Services.
-
N-Best
- The ability to return more
than one speech recognition result. Typically, an array of results is available
in the application in order of descending probability.
-
NCA
- See Network
Computing Architecture.
-
NCName
- See non-colonized name.
-
NCP
- (1) See network
control program.
- (2) See Network Control
Program.
-
NCP generation
- The process by which
the host processor assembles and link-edits a macroinstruction to produce
a Network Control Program.
-
NDM
- See normal
disconnected mode.
-
NDMP
- See Network
Data Management Protocol.
-
NDR
- See Network
Data Representation.
-
nearest active upstream neighbor (NAUN)
- In the IBM Token-Ring Network, the station sending data directly to
another station in the ring.
-
near synchronous mode
- In high availability
disaster recovery, the synchronization mode in which the primary database
considers a transaction committed when it receives a message from the standby
database confirming that the log data was received and written to the main
memory of the standby system. See also peer state, synchronization mode.
-
NEB
- See node
error block.
-
negate
- To make ineffective or not
valid.
-
negated combined condition
- In COBOL,
the NOT logical operator immediately followed by a combined condition in parentheses.
-
negated condition
- A condition that
is made opposite (either true or false), by the NOT logical operator.
-
negated simple condition
- In COBOL,
the NOT logical operator immediately followed by a simple condition.
-
negative acknowledgment character (NAK character)
- The binary synchronous communication (BSC) transmission control
character that indicates that the device is not ready or that an error occurred.
-
negative acknowledgment reply (NACK)
- A reply from a printer to a host indicating that an exception has occurred.
-
negative polling limit
- For a start-stop
(SS) or binary synchronous communication (BSC) terminal, the maximum number
of consecutive negative responses to polling that the communication controller
accepts before suspending polling operations.
-
negative response (NR)
- In SNA, a
response indicating that a request did not arrive successfully or was not
processed successfully by the receiver. See also positive
response.
-
negotiable link station
- The capability
of a link station to assume either a primary link-station or secondary link-station
role and to negotiate with a partner link station during link activation which
role it will assume.
-
negotiable lock
- A lock whose mode
can be downgraded, by agreement among contending users, to be compatible to
all. A physical lock is an example of a negotiable lock.
-
negotiated release
- In OSI, a service
provided by the session layer that enables an application entity that has
received a release indication to refuse the release and continue the session
connection.
-
negotiated session key
- An encryption
key that is created at the beginning of the SSL handshake, which determines
the key used when encrypting information over an SSL connection. The negotiated
session key changes each time a new session is initiated.
-
negotiation
- A two-phase process by
which an initiating key server communicates with a responding key server.
If the negotiations are successful, the key servers establish a dynamic virtual
private network (VPN) connection that is between the two agreed-on endpoints.
This approach, which is directed by the Internet Key Exchange (IKE) protocols,
maintains the secrecy of keys.
-
NEP
- See node
error program.
-
nest
- To incorporate a structure or
structures into a structure of the same kind; for example, one call instruction
(nested call) within another call instruction (nesting call) or one subroutine
(nested subroutine) within another subroutine (nesting subroutine).
-
nested bag
- In the WebSphere MQ Administration
Interface (MQAI), a system bag that is inserted into another data bag
-
nested call
- A call to a program incorporated
within another call to a program within the same job.
-
nested class
- A C++ class defined
within the scope of another class.
-
nested command
- A command or group
of commands whose processing is conditioned on the evaluation of a preceding
or associated command. Nesting is a structured form of branching. In CL programs,
the nested command is merged into an associated command. If the nested command
is a DO command, the entire do group is nested.
-
nested condition
- A condition that
occurs during the handling of another, previous condition.
-
nested DO group
- A DO group that is
contained within another DO group.
-
nested enclave
- A new enclave created
by an existing enclave. The nested enclave that is created must be a new main
routine within the process. See also child enclave, parent enclave.
-
nested exception
- An exception that
occurs while another exception is being handled.
-
nested group
- A group that is contained
within another group.
-
nested message
- A message that is
composed of one or more message types.
-
nested message type
- A message type
that is contained in another message type. In some cases, only part of a message
type (for example, only the mandatory fields) is nested, but this "partial"
nested message type is also considered to be nested. For example, SWIFT MT
195 could be used to request information about a SWIFT MT 100 (customer transfer).
The SWIFT MT 100 (or at least its mandatory fields) is then nested in SWIFT
MT 195.
-
nested program
- In COBOL, a program
that is directly contained within another program.
-
nested resource
- A resource mapped
in an overlay.
-
nested savepoint
- A savepoint that
is included or positioned within another savepoint. Nested savepoints allow
an application to have multiple levels of savepoints active at a time and
allow the application to rollback to any active savepoint as desired.
-
nested subtree
- A subtree within another
subtree of the directory.
-
nested table expression
- A fullselect
surrounded by parentheses in a FROM clause.
-
nesting
- In the WebSphere MQ Administration
Interface (MQAI), a means of grouping information returned from WebSphere
MQ.
-
nesting identifier
- An identifier
(a number from 2 to 255) that is used to access a nested message type.
-
.NET
- A distributed, Internet-based
Microsoft computing platform that consists of development tools, runtime services,
operating system features, servers, and Internet protocols.
-
NET
- See node
error table.
-
Net 5
- The test specification for
conformance to the Euro-ISDN standard for primary rate access to ISDN.
-
NetBIOS (Network Basic Input/Output System)
- A standard interface to networks and personal computers that is used
on local area networks to provide message, print-server, and file-server functions.
Application programs that use NetBIOS do not have to handle the details of
LAN data link control (DLC) protocols.
-
NetDA
- See Network Design and Analysis.
-
NetDA/2
- See Network Design and Analysis/2.
-
Net.Data
- A program with which a user
can create interactive Web applications by using macros to add logic, variables,
program calls, and report writing to HTML.
-
.NET Framework
- A Microsoft application
development environment that consists of the common language runtime and .NET
Framework class library that is designed to provide a consistent programming
environment for developing and integrating code pieces. See also common language runtime.
-
netgroup
- A network-wide group of
hosts and users. A netgroup can be used to restrict access to shared information
on Network File Systems (NFS) and to restrict remote access.
-
net ID (NETID)
- See network identifier.
-
NETID (net ID, network ID)
- See network identifier.
-
netmask
- See network mask.
-
netname
- A shared resource on a server.
When a netname is assigned to a resource, the user must refer to it by its
netname and specify the server where the resource is located.
-
NETNAME
- In CICS, the name by which
a CICS terminal or a CICS system is known to VTAM.
-
NETPARS
- See Network Performance Analysis and Reporting System.
-
net present value (NPV)
- The estimated
monetary value of an investment based on expected returns and expected costs,
where these expected returns and expenses are discounted by a rate that reflects
inflation and opportunity costs.
-
NetSpool
- A component of Infoprint
Server that provides the capability for an installation to automatically direct
VTAM application data targeted for a network printer to the JES spool without
changing the VTAM applications. From the JES spool, the data can be printed
on a JES or PSF printer or sent to another location for printing.
-
netting system
- A clearing system
that nets the debit and credit payments of a bank, that is, that maintains
as a balance only the difference between debits and credits.
-
NetView
- (1) Pertaining to an IBM licensed
program that is used to monitor a network, manage it, and diagnose its problems.
- (2) A network management product that can provide automated operations
and rapid notification of events.
-
NetView Performance Monitor (NPM)
- An IBM licensed program that collects, monitors, analyzes, and displays data
relevant to the performance of a VTAM telecommunication network. It runs as
an online VTAM application program.
-
NetWare managed site
- In a Tivoli
environment, a resource that represents (a) a Novell NetWare server on which
the Tivoli NetWare repeater is installed and (b) one or more clients. A NetWare
managed site enables profiles to be distributed through the NetWare server
to one or more specified client PCs using either TCP/IP or IPX.
-
network
- In data communication, a
configuration in which two or more locations are physically connected for
the purpose of exchanging data.
-
network acknowledgment
- A response
from the network indicating the status of an interchange envelope, such as
sent or received.
-
network adapter
- A physical device,
and its associated software, that enables a processor or controller to be
connected to a network.
-
network address
- (1) An identifier for
a node in a network.
- (2) In SNA networking, an address that consists
of subarea and element fields and identifies a link, link station, or network
addressable unit.
-
network addressable unit (NAU)
- In
SNA networking, any device on the network that has a network address, including
logical units, physical units, and system service control points.
-
network address translation (NAT)
- (1) The conversion of a network address that is assigned to a logical unit in
one network into an address in an adjacent network. See also static network address translation.
- (2) In a firewall, the conversion
of secure Internet Protocol (IP) addresses to external registered addresses.
This enables communications with external networks but masks the IP addresses
that are used inside the firewall.
-
network administrator
- A person who
defines the network configuration and other network-related information. This
person controls how an enterprise or system uses its network resources.
-
network architecture
- The logical
structure and operating principles of a computer network. The operating principles
of a network include those of services, functions, and protocols.
-
network-attached storage (NAS)
- A
task-optimized storage device directly attached to a network that operates
independently of the general-purpose file servers.
-
network attribute
- Control information
about the communications environment. System name and default local location
name are examples of network attributes. See also system value.
-
network authentication service
- The
i5/OS implementation of the Kerberos V5 standard protocol that enables the
System i product and several System i services (such as IBM System i5 Access
for Windows) to use for authentication a Kerberos ticket as an optional replacement
for a user name and password.
-
network-based authentication
- A protected
object policy (POP) that controls access to objects based on the Internet
protocol (IP) address of the user.
-
Network Basic Input/Output System
- See NetBIOS.
-
network boot
- The process of starting
a computer directly over the network rather than from a disk.
-
network byte order
- The byte order
that a network uses to transmit data. In the Internet, this byte order is
always big endian.
-
network class
- (1) The type of TCP/IP
network, such as Class A, Class B, or Class C.
- (2) An object class
that is used for symbols that represent compound objects that might contain
objects such as hosts and network devices. See also connector class.
-
network computing
- The use of a scalable
distributed computing infrastructure that encompasses the key elements of
networking technologies. Examples are systems and network management; the
Internet and intranets; clients and servers; application programs, databases;
transaction processing; and various operating systems and communication protocols.
-
Network Computing Architecture (NCA)
- A set of protocols and architectures that support distributed computing.
-
network configuration
- In SNA, the
group of links, nodes, machine features, devices, and programs that make up
a data processing system, a network, or a communication system.
-
network control program (NCP)
- (1) A program
that controls the operation of a communication controller.
- (2) A program
used for requests and responses exchanged between physical units in a network
for data flow control.
-
Network Control Program (NCP)
- An
IBM licensed program that provides communication controller support for single-domain,
multiple-domain, and interconnected network capability.
-
network convergence
- The act of updating
the topology database of all attached routing nodes to reflect the addition,
deletion, or changes to the reachability and metrics of a network resource.
The updating is accomplished through the exchange of topology messages.
-
network credential
- The data specific
to each underlying security mechanism.
-
Network Data Management Protocol (NDMP)
- An industry-standard protocol that enables a network storage-management
application to control the backup and recovery of a file server, without installing
third-party software on that file server.
-
Network Data Representation (NDR)
- In DCE Remote Procedure Call (RPC), the transfer syntax defined by the Network
Computing Architecture.
-
network deployment cell
- A logical
group of servers, on one or more machines, managed by a single deployment
manager.
-
Network Design and Analysis (NetDA)
- A host-based IBM licensed program for designing and analyzing networks. Its
major functions are network definition, performance and availability analysis,
route generation and explicit route (ER) numbering, and path-statement generation.
See also Network Design and Analysis/2.
-
Network Design and Analysis/2 (NetDA/2)
- A workstation-based IBM licensed program for designing network topology
and routing. NetDA/2 assists the network designer with capacity planning and
performance management, network management, configuration management, and
business management. See also Network Design and Analysis.
-
network directory database
- See distributed directory database.
-
network drive
- A directory resource
on the hard disk of a server that users can access by assigning a drive letter
to the resource.
-
network driver
- A program that allows
two or more computers or work stations to interoperate over a communications
network. The computers or work stations may be heterogeneous or homogeneous
devices. Services provided by a network driver can include file sharing, remote
database access, electronic mail, remote print services, time services, security
services, data conversion, remote function call, and work station emulation.
-
network driver for Microsoft Windows
- In System i Access, a program that integrates System i Access functions with
the standard user interface in the Microsoft Windows program. The Windows
network driver allows a Windows user to redirect print files to a System i
server (using the virtual print function), manage these redirected printer
files (using Windows Print Manager), and use remote System i server files
(using the shared folders function).
-
network element
- In the Simple Network
Management Protocol (SNMP), a gateway, router, or host that contains management
agents responsible for performing the network management functions requested
by the network management stations.
-
network entity
- In OSI, a component,
such as the OSI Communications Subsystem network layer, that provides network
services for an open system.
-
network entity title
- In OSI, a title
that identifies the network entity on a given node. Because a node can have
only one network entity, the network entity title uniquely identifies a given
node. Network entity titles are represented in the same format as NSAP addresses.
-
network entity title nickname
- In
OSI, a nickname that identifies a network entity title.
-
network file
- In object distribution,
a file (either a physical file or a save file) sent by one user to one or
more other users. A network file is placed on the recipient's message queue
when it arrives at the destination system.
-
Network File System (NFS)
- A protocol,
developed by Sun Microsystems, Incorporated, that allows a computer to access
files over a network as if they were on its local disks.
-
network group
- In Backup, Recovery,
and Media Services, a cluster of systems sharing a common media inventory.
Available tapes are eligible for use by any system in the network group. Each
system in the network group receives updates to the media inventory, regardless
of which network member makes the change.
-
network ID (NETID)
- See network identifier.
-
network identifier (NETID, net ID, network ID)
- (1) In TCP/IP, that part of the IP address that defines a network.
The length of the network ID depends on the type of network class (A, B, or
C).
- (2) A single character that is placed before a message type to
indicate which network is to be used to send the message; for example, S for
SWIFT.
- (3) The network ID that is assigned by IMS or CICS, or if the
connection type is RRSAF, the RRS unit of recovery ID (URID).
-
Network Information Service (NIS)
- A set of protocols, developed by Sun Microsystems, that are used to provide
directory services for network information.
-
network information services
- A set
of UNIX network services (for example, a distributed service for retrieving
information about the users, groups, network addresses, and gateways in a
network) that resolve naming and addressing differences among computers in
a network.
-
Networking Blueprint
- An open, highly
modular framework for networking support using industry-wide standards. The
Networking Blueprint (a) incorporates multiple protocols and multiple vendor
components; (b) enables comprehensive systems management and application choices
independent of the network; and (c) facilitates the support of new technologies.
-
Networking Broadband Services (NBBS)
- An IBM architecture for high-speed networking that complements the asynchronous
transfer mode (ATM) standards and provides access services, transport services,
and network control for user traffic.
-
networking protocol
- Rules for using
communication lines. Protocols can identify the direction of data flow, where
data begins and ends, how much data is being transmitted, and whether data
or control information is being sent. The two protocols that JES3 uses to
establish a networking environment are binary synchronous communication (BSC)
and systems network architecture (SNA).
-
network interface (NWI)
- The physical
interface that allows a user to connect to the integrated services digital
network (ISDN).
-
network interface controller (NIC)
- Hardware that provides the interface control between system main storage and
external high-speed link (HSL) ports.
-
Network Interface Definition Language (NIDL)
- A declarative language for the definition of interfaces that
has two forms, a Pascal-like syntax and a C-like syntax. NIDL is a component
of the Network Computing Architecture.
-
network interface description
- An
i5/OS communications object that represents the physical interface to the
integrated services digital network (ISDN). The network interface description
must be configured in addition to the line, controller, and device descriptions.
The system-recognized identifier for the object type is *NWID.
-
network job
- (1) In object distribution,
a batch input stream sent by one user to one or more users in the network
as defined in the system distribution directory.
- (2)
-
network job entry (NJE)
- (1) In object
distribution, an entry in the network job table that specifies the system
action required for incoming network jobs sent by a particular user or group
of users. Each entry is identified by the user ID of the originating user
or group.
- (2) In CICS/VSE only, a facility for transmitting jobs (JCL
and in-stream data sets), SYSOUT data sets, (job-oriented) operator commands
and operator messages, and job accounting information from one computing system
to another.
- (3) A facility for linking single-processor systems or
multi-access spool complexes into a processing network
-
network job table
- In object distribution,
a table containing entries that control the system action required for incoming
network jobs.
-
network layer
- In OSI architecture,
the layer that provides services to establish a path between open systems
with a predictable quality of service.
-
network layer packet (NLP)
- A message
unit used to carry data between High-Performance Routing (HPR) nodes.
-
network-layer protocol data unit (NPDU)
- In OSI, a protocol data unit in the network layer. (I)
-
network-layer service access point
- In OSI, a service access point in the network layer. (I)
-
network-layer service data unit (NSDU)
- In OSI, a unit of data transferred between the transport layer and the
network layer.
-
Network Lock Manager (NLM)
- A service
used by Network File System (NFS) when using version 2 or 3 of the NFS protocol
that allows a client on the host to lock a record or a file on the NFS server.
-
Network Logic Data Manager (NLDM)
- A program that collects and interprets records of errors detected in a network
and suggests possible solutions. NLDM consists of commands and data services
processors that comprise the Netview software monitor component.
-
network management
- (1) The process of
planning, organizing, and controlling a communications-oriented system.
- (2) In OSI, systems management that involves processing and exchanging management
information over two or more nodes. Network management provides the ability
to manage one or more nodes from another node.
-
network management association
- In
OSI, an ACSE association between two systems management application entities
(SMAEs)--one representing a managing process, the other representing an agent
process. After network management associations are established, a manager
can send operator commands to its agents and an agent can send event reports
to its managers.
-
network management domain
- In OSI,
a manager and the agents that it manages. An agent can participate in more
than one network management domain. In OSI Communications Subsystem, the agent
at a local node is always part of the management domain of the manager at
that local node.
-
network management station (NMS)
- In the Simple Network Management Protocol (SNMP), a station that executes
management application programs that monitor and control network elements.
-
network management vector transport (NMVT)
- A management services request/response unit (RU) that flows over an
active session between physical unit management services and control point
management services (SSCP-PU session). See also control
point management services unit.
-
network mask (netmask)
- A number that
is the same as an Internet Protocol (IP) address. A network mask identifies
which part of an address is to be used for an operation, such as making a
TCP/IP connection.
-
network message
- In object distribution,
a message sent by one user to one or more users enrolled in the system distribution
directory with the Send Network Message (SNDNETMSG) command.
-
network mode
- See network QOS mode.
-
network name
- In SNA, a symbolic name
by which end users refer to a network addressable unit (NAU), a link station,
or a link.
-
Network News Transfer Protocol (NNTP)
- A protocol that is used to post messages in, distribute messages to,
and retrieve messages from newsgroups and to transfer articles between news
servers.
-
network node
- A node that can define
the paths or routes, control route selection, and handle directory services
for the APPN function.
-
network node control point (NNCP)
- A control point that provides session and routing services to adjacent end
nodes.
-
network node server
- A network node
that is directly connected to an end node or a low-entry networking end node,
and has been assigned to service the end node session requests.
-
network operator
- A person who controls
the day to day operation of all or part of a network.
-
network path
- In System i Access,
the system, path, or library, and the name of the server network driver, network
printer, or data queue that the user is accessing. For example, the network
path used to access a printer through the network driver is: //system/library/printer.
-
Network Performance Analysis and Reporting System
(NETPARS)
- An IBM licensed program that analyzes network log data
from the NetView Performance Monitor (NPM).
-
network performance analysis logical unit (NPALU)
- A logical unit (LU) defined in the network control program (NCP)
that is used to collect performance data from the NCP.
-
Network Printer Manager (NPM)
- An
application that lets network administrators monitor, control, and configure
IBM network printers. NPM also lets network administrators monitor some aspects
of printers controlled by PSF and other manufacturers' network printers that
comply with RFC 1759.
-
Network Print Facility (NPF)
- A feature
that routes VTAM, JES2, or JES3 printer output to printers in a TCP/IP network.
-
Network Problem Determination Application (NPDA)
- A program that collects and interprets records of errors detected
in a network and suggests possible solutions. NPDA consists of commands and
data services processors that comprise the Netview hardware monitor component.
-
network protocol
- A communication
protocol from the Network Layer of the Open Systems Interconnect (OSI) network
architecture, such as the Internet Protocol (IP).
-
network protocol stack
- A set of network
protocol layers and software that work together to process the protocols.
-
network QOS mode (network mode)
- In the OSI Communications Subsystem licensed program, a set of X.25 connection-mode
quality-of-service (QOS) values that determine the type of connection established
between two nodes.
-
network-qualified name
- In SNA, a
name that uniquely identifies a specific resource, such as a logical unit
(LU) or control point (CP), within a specific network. A network-qualified
name consists of a network identifier and a resource name, each of which is
a symbol string that is 1 to 8 bytes.
-
network resource
- In OSI, a general
term for resources available to the network, such as lines and line sets.
-
network routing facility (NRF)
- An
i5/OS function that runs with the Network Routing Facility licensed program
to allow the path for data to go from a display station to a server application.
-
Network Routing Facility
- A licensed
program that runs under the control of the Network Control Program and uses
a System/370 backbone network. The network routing facility provides primary
logical unit support and a path for data between a display station and an
application without using the System/370 host system.
-
network security layer
- Software that
is responsible for authenticating end users and authorizing them to access
network resources, such as IBM Tivoli Access Manager. See also credential mapper.
-
network server description (NWSD)
- An object that contains a description of the characteristics of a file server
I/O processor that is attached to the system.
-
network service access point
- The
endpoint of a network connection used by the SWIFT transport layer.
-
network service header (NS header)
- In SNA, a 3-byte field in a function management data (FMD) request/response
unit (RU) flowing in an SSCP-LU, SSCP-PU, or SSCP-SSCP session. The network
services header is used primarily to identify the network services category
of the request unit (RU) (for example, configuration services and session
services) and the particular request code within a category.
-
Network Shared Disk (NSD)
- A component
for cluster-wide disk naming and access.
-
Network Status Manager (NSM)
- A service
used by Network File System (NFS) when using version 2 or 3 of the NFS protocol
to determine whether resources, such as file open share or byte range locks,
are still in use by a remote client.
-
network table file
- A text file that
contains the system-specific configuration information for each node in a
Content Manager system. Each node in the system must have a network table
file that identifies the node and lists the nodes that it needs to connect
to. The name of a network table is FRNOLINT.TBL.
-
network termination (NT)
- In ISDN,
equipment that provides the function necessary for the operation of the access
protocols by the network.
-
network termination 1 (NT1)
- In ISDN,
an end point for the network's transmission line. Network termination 1 is
responsible for the physical layer characteristics (of the OSI reference model),
such as ending the line transmission, monitoring performance, and timing.
-
network termination 2 (NT2)
- In ISDN,
an end point for the network's transmission line. Network termination 2 is
responsible for the network layer, the data link layer, and the remaining
functions of the physical layer (not included in network termination 1) of
the OSI reference model. Examples include communications controllers and public
branch exchanges (PBXs).
-
Network Time Protocol
- A protocol
that synchronizes the clocks of computers in a network.
-
network topology database
- (1) In Managed
System Services, a set of database files that contain topology information
and general system information for nodes throughout the network.
- (2) The representation of the current topology of the intermediate routing portion
of the APPN network. The network topology database contains entries for network
nodes and the transmission groups interconnecting them. Each entry describes
the current characteristics of the node or transmission group that it represents.
The topology database is used to determine the preferred session route between
two end nodes for a given class of service.
-
network topology template (NTT)
- A template that depicts how the logical deployment template nodes communicate
with each other.
-
network type
- In DCE Remote Procedure
Call (RPC), a type defined in an interface definition and referred to in a
represent_as clause that is converted into a local type for manipulation by
application code.
-
network user identification (NUI)
- In X.25, the network specific information that enables the transmitting data
terminal equipment (DTE) to provide billing, security, or management information
on a per-call basis to the data circuit-terminating equipment (DCE). The NUI
can identify a network user independently of the port being used.
-
network virtual terminal (NVT)
- A
Telnet service that provides a default common interface to remote terminals.
The client application negotiates NVT support and, as a result, the Telnet
server maps 5250 functions to virtual terminal characters.
-
neutral color
- In the GDDM function,
one of the colors selected to display graphics primitives; for example, white
on a display or black on a printer. See also background
color.
-
newline character (NL)
- A control
character that causes the print or display position to move down one line.
-
newsfeed
- The periodic transfer of
newly posted newsgroup articles from one NNTP server to another using the
NNTP protocol. Enabling the NNTP protocol on a Domino server, allows for the
set up a newsfeed to transfer both USENET and private newsgroup articles.
-
newsgroup
- An online discussion group
that users with newsreaders can participate in. A Domino NNTP server can store
Usenet newsgroups, public newsgroups distributed on the Internet, and private
newsgroups.
-
News Industry Text Format (NITF)
- An XML-based format that defines the structure and content of news articles.
-
News Markup Language (NewsML)
- An
XML-based format for publishing news-related information.
-
NewsML
- See News Markup Language.
-
newsreader
- A client application that
runs the NNTP protocol and is used to select, view, create, sort, and print
Usenet and private newsgroup articles.
-
newton (N)
- The unit of force required
to impart an acceleration of one meter per second per second to a mass of
one kilogram.
-
next available byte (NAB)
- The address
of the next available byte of storage on a doubleword boundary. This address
is a segment of stack storage.
-
next operable sentence
- In COBOL,
the next sentence to which control will be transferred after the running of
the current statement is complete.
-
next record
- The record that logically
follows the current record of a file.
-
next sequential instruction
- The next
instruction to be executed in the absence of any branch or transfer of control.
-
next system
- A node in the SNADS network
that is physically connected to the local system, and through which distribution
items can be routed.
-
next system queue
- In SNADS, a queue
that is used to hold distribution items that are being routed to a next system.
-
next system table
- In SNADS, a table
identifying all the systems physically connected to the local system.
-
NFAS
- See non-facility-associated
signaling.
-
NFS
- See Network
File System.
-
NFS client
- A program or system that
mounts remote file directories from another host called a Network File System
(NFS) server.
-
NFS server
- A program or system that
allows authorized remote hosts called Network File System (NFS) clients to
mount and access its local file directories.
-
n-gram segmentation
- A method of analysis
that considers overlapping sequences of a given number of characters as a
single word rather than using blank space to delimit words as in Unicode-based
white space segmentation.
-
NIB
- See node
initialization block.
-
NIC
- See network
interface controller.
-
nickname
- (1) In a federated system, an
identifier that is used in a distributed request to refer to an object at
a remote data source. The objects that nicknames identify are referred to
as data source objects. Examples of data source objects are tables, views,
synonyms, table-structured files, and search algorithms. See also data source object.
- (2) In the OSI Communications Subsystem licensed
program, a 1- to 8-character name that identifies an object or entity in an
OSI network. Nicknames are provided by OSI Communications Subsystem to enable
users to use simple names instead of the often long, multipart, sometimes
binary-coded identifiers required by OSI protocols.
- (3) See alias.
-
NIDL
- See Network
Interface Definition Language.
-
NIM master
- An AIX 5L system that
can install one or more Network Installation Manager (NIM) clients. An AIX
5L system must be defined as a NIM master before any NIM clients can be defined
on that system. A NIM master manages the configuration database, which contains
information for the NIM clients. In CSM, the NIM master is the management
server.
-
NIM object
- For AIX 5L, a representation
of information about the Network Installation Manager (NIM) environment. NIM
stores this information as objects in the NIM database.
-
NIM resources
- For AIX 5L, the files
and directories that the Network Installation Manager (NIM) uses to install
a node.
-
NIP
- See nucleus
initialization program.
-
NIS
- See Network
Information Service.
-
NIST
- See National
Institute of Standards and Technology.
-
NIT
- See node
information table.
-
NITF
- See News
Industry Text Format.
-
NJE
- See network
job entry.
-
NL
- See newline
character.
-
NLDF
- See national
language dependent function.
-
NLDM
- See Network
Logic Data Manager.
-
NLM
- See Network
Lock Manager.
-
NLP
- (1) See natural
language processing.
- (2) See network layer
packet.
-
NL_port
- See node loop port.
-
NLS-enabled
- Pertaining to any product
that is internationalized and localized.
-
NLS implementation
- See internationalization.
-
NLT
- See nucleus
load table.
-
NMS
- See network
management station.
-
NMVT
- See network
management vector transport.
-
NNCP
- See network
node control point.
-
NNTP
- See Network
News Transfer Protocol.
-
no access
- An access level with which
users have no access to a Notes database; they cannot even add the database
icon to their workspaces.
-
no access state
- A state indicating
that neither read access nor write access to a table is allowed.
-
no data movement state
- A state indicating
that data movement operations within a table are not allowed.
-
node
- (1) In hardware, a uniprocessor
or symmetric multiprocessor (SMP) computer that is part of a clustered system
or a massively parallel processing (MPP) system.
- (2) In communications,
an end point of a communication link or a junction common to two or more links
in a network. Nodes can be processors, communication controllers, cluster
controllers, terminals, or workstations. Nodes can vary in routing and other
functional capabilities.
- (3) A location in a communications network
that provides host-processing services.
- (4) In X.25, a point where
packets are received, stored, and forwarded to another location (or data terminal
equipment) according to a routing method defined for the network.
- (5) In networking, a point capable of sending and receiving data. A node can be
a device, such as printer or workstation, a system, or a storage location
on a disk. See also port.
- (6) In XML, the
smallest unit of valid, complete structure in a document.
- (7) One
of the points in a topology view or topology diagram. A node usually corresponds
to a machine, but depending on the type of view, might also correspond to
a facility, base product, solution element, or solution artifact.
- (8) In a network, a point at which one or more functional units connect channels
or data circuits.
- (9) A logical grouping of managed servers. See also
managed node.
- (10) An endpoint or junction
used in a message flow. See also message flow node.
- (11) An element in a message mapping tree.
- (12) In Microsoft
Cluster Server (MSCS), each computer in the cluster.
- (13) The fundamental
shapes that make up a diagram.
- (14) See database
partition.
- (15) One SAN Volume Controller. Each node provides virtualization,
cache, and Copy Services to the storage area network (SAN).
- (16) A
fibre-channel device that contains a node port (N_port) or node loop port
(NL_port).
- (17) Any item on a tree control, including a simple element,
compound element, mapping command, comment, or group node.
- (18) An
instance of one of the node kinds that are defined by the XQuery and XPath
data model. See also item, node kind, XQuery and XPath data model.
- (19) A UML model element that represents the computational resources of a
system, such as personal computers, sensors, printing devices, or servers.
- (20) An individual operating-system image within a cluster. Depending
on the way in which the computer system is partitioned, it may contain one
or more nodes.
- (21) A computer location defined in a network.
- (22) An IMS resource that represents a physical VTAM terminal. The node is
represented by a VTAM terminal control block.
- (23) One operating system
image.
-
node abnormal condition program (NACP)
- A CICS program used by terminal control to analyze terminal abnormal
conditions that are logical unit or node errors detected by VTAM.
-
node agent
- An administrative agent
that manages all application servers on a node and represents the node in
the management cell.
-
node-attached policy group
- A simple
policy group that is associated with a particular node in a policy hierarchy.
See also node-level policy group, simple policy group.
-
nodedef file
- See node definition file.
-
node definition file (nodedef file)
- A file containing a stanza of information for defining each node in a cluster.
-
node descriptor
- A definition that
indicates how a node is used. Possible functions include manager node, client
node, quorum node, and non-quorum node.
-
node directory
- A directory that contains
information that is necessary to establish communications from a client workstation
to all applicable database servers.
-
node error block (NEB)
- A set of recording
areas of the node error table used to count node errors relating to a single
logical unit.
-
node error program (NEP)
- A user-replaceable
program used to allow user-dependent processing whenever a communication error
is reported to CICS
-
node error table (NET)
- Table used
by the node error program.
-
node federation
- The process of combining
the managed resources of one node into a distributed network such that the
central manager application can access and administer the resources on the
node.
-
node group
- (1) A collection of WebSphere
Application Server nodes that defines a boundary for server cluster formation.
- (2) Nodes having similar attribute values and defined as a group
to facilitate node management.
-
node ID
- See node identifier.
-
node identifier (node ID)
- In a tree-like
representation of XML instance documents, a unique pointer to a specific node.
A node ID can also point to a node that is generated by a constructor.
-
node ID index
- See XML node ID index.
-
node information table (NIT)
- An internal
control block containing information about each network job entry (NJE) node.
-
node initialization block (NIB)
- In VTAM, a control block associated with a particular node or session that
contains information used by the application program to identify the node
or session and to indicate how communication requests on a session are to
be handled by VTAM.
-
node instance
- A UML model element
that represents an instantiation, or actual occurrence, of a node.
-
node kind
- A designation that defines
a node according to the data that the node contains. The XQuery and XPath
data model defines the following node kinds: document, element, attribute,
text, processing instruction, and comment. See also node, processing instruction.
-
node-level policy group
- One or more
policies, or one or more simple policy groups, or both, that are of the same
scope and that are associated with a particular node in a policy hierarchy.
See also node-attached policy group, simple policy group.
-
node list
- A system object that contains
a list of SNA nodes identified by an APPN network ID and control point name.
The system-recognized identifier for the object type is *NODL.
-
nodelocked license
- A type of license
locked to a specific node, so that the product can be used only at that node.
The nodelocked license is installed on the workstation for which it was created.
-
node loop port (NL_port)
- A port specific
to Fibre Channel Arbitrated Loop (FC-AL). An NL_port has the same functional,
logical, and message handling capability as a node port (N_port), but connects
to an arbitrated loop rather than to a fabric. In some implementations, ports
can function either as N_ports or as NL_ports depending on the network to
which they are connected. An NL_port must replicate frames and pass them on
when in passive loop mode. See also arbitrated loop, Nx_port.
-
node name
- (1) The name assigned to a
node during network definition.
- (2) The machine name or host name
that must be unique.
- (3) An 8-character alphanumeric name that represents
a node to other parts of the network job entry (NJE) network.
-
node number
- A number that is generated
by GPFS as the cluster is created and maintained by GPFS as nodes are added
to or deleted from the cluster.
-
node port (N_port)
- A port that connects
a node to a fabric or to another node. An N_port connects to a fabric port
(F_port) or to the N_port of another node. An N_port handles creation, detection,
and flow of message units to and from the connected systems. N_ports are end
points in point-to-point links. See also Nx_port.
-
node quorum
- The minimum number of
nodes that must be running in order for the daemon to start.
-
node rescue
- The process by which
a node that has no valid software installed on its hard disk drive can copy
software from another node connected to the same fibre-channel fabric.
-
nodes attached table (NAT)
- An internal
control block containing information about each pair of nodes that is connected
or recently disconnected.
-
node test
- A test that determines
if a condition is true for each node that is selected by a step in a path
expression. See also kind test, name test, path expression, step.
-
node-to-node communication
- Internal
communication between clustered nodes uses the virtual Ethernet as the private
network (or interconnect) that carries the heartbeat. The cluster service
on each node uses a heartbeat to keep track of the current state of the nodes
within the cluster. The cluster service uses the heartbeat to: (1) Determine
when a failover to another node should occur, (2) Synchronize the cluster
databases on each node, (3) Verify node failures during a cluster configuration
change. The private network uses the single network virtual Ethernet model.
-
node type
- The designation of a node
according to the protocols it supports or the role it plays in a network.
Examples of Advanced Peer-to-Peer Networking (APPN) node types are network
node and end node.
-
no-follow directive
- A directive in
a Web page that instruct robots (such as the Web crawler) to not follow links
found in that page.
-
no-index directive
- A directive in
a Web page that instruct robots (such as the Web crawler) to not include the
contents of that page in the index.
-
noise
- A random signal of known statistical
properties of amplitude, distribution, and spectral density.
-
nonadjacent destination node
- In the
OSI Communications Subsystem licensed program, a destination node that is
connected to a different subnetwork from the local node. To communicate with
a nonadjacent destination node requires the use of a relay node. See also
adjacent destination node.
-
noncanonical address
- In LANs, a format
for the transmission of medium access control (MAC) addresses for token-ring
adapters. In noncanonical format, the most significant (leftmost) bit of each
address byte is transmitted first. See also canonical
address.
-
nonce
- (1) A random, unique text string
that is encrypted along with data and then is used to detect attacks against
the system that sends the encrypted data. A nonce is used especially for authentication
and ensures that encrypted data is different each time that it is encrypted.
- (2) A unique cryptographic number that is embedded in a message to
help detect a replay attack.
-
non-colonized name (NCName)
- A name
that does not contain a colon character. A lexical QName consists of two NCNames,
the namespace prefix and the local name, which are separated by a colon.
-
noncomplete CCD table
- In SQL replication,
a CCD table that is initially empty and has rows appended to it as changes
are made to the replication source. See also complete
CCD table.
-
noncondensed CCD table
- In SQL replication,
a CCD table that can contain more than one row for each key value. These duplicate
rows represent the history of changes for the values in the rows of a table.
See also condensed CCD table, consistent-change-data table.
-
noncontiguous item
- In COBOL, a data
item in the Working-Storage and Linkage Sections of the Data Division that
bears no relationship to other data items.
-
nonconversational
- A mode of CICS
operation in which resources are allocated, used, and released immediately
on completion of the task.
-
noncumulative backup
- See delta backup.
-
noncumulative mapping
- A form of BMS
output mapping, in which each SEND MAP command generates a device-dependent
data stream for output to the terminal device, unless PAGING or SET options
are specified.
-
non-default working time
- A value
that changes a default value in the project calendar.
-
nondelimited ASCII format
- A file
format that is used to import data. A nondelimited ASCII file is a sequential
ASCII file with row delimiters used for data exchange with any ASCII product;
column values are not separated by delimiters.
-
non-deterministic dictionary
- A dictionary
in which there are many possible paths for a given input letter when matching
a string to find a word. See also deterministic dictionary.
-
non-deterministic function
- A user-defined
function whose result is not solely dependent on the values of the input arguments.
That is, successive invocation with the same argument value can produce a
different answer.
-
nondisjoint
- A type of distributed
transaction in which all of the nodes are connected, using the same protocol.
-
nondisruptive
- Pertaining to an action
or activity that does not result, from the customer's view, in the loss of
any existing capability or resource.
-
nondisruptive installation
- The physical
installation of additional units while normal operations continue. See also
nondisruptive removal.
-
nondisruptive removal
- The physical
removal of existing units while normal operations continue without interruption.
See also nondisruptive installation.
-
nonescaping key
- A key that allows
a character to be typed without the presentation position being changed. Nonescaping
keys are used for building an accented character.
-
nonexecutable statement
- In DB2 for
i5/OS, an SQL statement that can be embedded only in an application program.
-
nonexposed name
- In DB2 for i5/OS,
a table name or view name for which a correlation name is specified.
-
non-facility-associated signaling (NFAS)
- An ISDN configuration where several T1 facilities can be controlled
by a single D-channel, instead of the normal T1 configuration where each T1
facility has 23 B-channels and a D-channel (23B+D). With NFAS, all 24 timeslots
of the nonsignaling trunks are available for voice whereas only 23 channels
can be used on the trunk that carries signaling traffic (23B+D+n24B). See
also D-channel backup.
-
non-functional requirement
- A requirement
that captures non-business requirements and constraints that are architecturally
significant.
-
nongeneric alert
- In SNA management
services (SNA/MS), alert information that is encoded such that it conveys
to the receiver the set of screens that should be displayed for the network
operator when the alert is received. The use of nongeneric alerts requires
that the receiver recognize and understand each unique problem for which an
alert is sent. See also generic alert.
-
non-guaranteed print labeling
- Some
printers that do not support guaranteed print labeling can still print identification
labels, but the integrity of the labels cannot be guaranteed using PSF. See
also guaranteed print labeling.
-
nonhosted partition
- A logical partition
that is not dependent on a logical partition for I/O resources.
-
nonimpact printer
- A printer in which
printing is not the result of mechanical impacts, for example, a thermal printer,
an electrostatic printer, and a photographic printer. See also impact printer.
-
noninteractive transaction
- The work
done by jobs and tasks, such as batch jobs and system activity, that may have
occurred as a result of an interactive transaction. See also interactive transaction.
-
non-ISC static user
- A user signed
on to a static terminal. The user is represented by a user ID that is defined
to an enhanced security product such as RACF.
-
nonlabeled tape
- A tape that has no
labels. Tape marks are used to indicate the end of the volume and the end
of each data file.
-
nonleaf page
- A index page that contains
keys and page numbers of other pages in the index (either leaf or nonleaf
pages). Nonleaf pages never point to actual data. See also leaf page.
-
nonlibrary user ASP
- An auxiliary
storage pool that contains journals, journal receivers, and save files. The
libraries for the objects are in the system ASP. See also library user ASP.
-
nonmanaged mode
- An environment in
which the application is responsible for generating and configuring connection
factories. The Java EE server does not own or know about these connection
factories and therefore provides no Quality of Service facilities.
-
non-message-driven program
- An application
program that is initiated by the submission of a batch job. This program runs
in either a BMP region, JBP region, or an IFP utility region. See also message-driven program.
-
nonnumeric item
- In COBOL, a data
item that is alphanumeric, alphabetic, or Boolean.
-
nonnumeric literal
- In COBOL, a character
string bounded by quotation marks, whose value is itself.
-
nonpageable dynamic area
- In MVS,
an area of virtual storage whose virtual addresses are identical to real addresses.
It is used for programs or parts of programs that are not to be paged during
execution.
-
nonpageable region
- In MVS, a subdivision
of the nonpageable dynamic area that is allocated to a job step or system
task that is not to be paged during execution. In a nonpageable region, each
virtual address is identical to its real address.
-
nonpaired data
- In Business Graphics
Utility and the GDDM function, data that is specified such that each X-value
has a set of Y-values associated with it. See also paired data.
-
nonparticipating mode
- In fibre-channel
technology, a mode in which a loop port (L_port) in a loop is inactive and
cannot arbitrate or send frames, but can retransmit any received transmissions.
This mode is entered if there are more than 127 devices in a loop and an arbitrated
loop physical address (AL_PA) cannot be acquired. See also participating mode, loop port.
-
nonpartitioned index
- An index in
which the leftmost columns are not the partitioning columns of the table.
The index is non-partitioned. See also secondary index.
-
nonpartitioned secondary index (NPSI)
- An index on a partitioned table space that is not the partitioning index
and is not partitioned. See also data-partitioned secondary
index.
-
nonpersistent message
- A message that
does not survive a restart of the queue manager. See also persistent message.
-
nonprinting character
- See control character.
-
nonprocess runout (NPRO)
- An operation
that moves paper or forms through the paper path without printing.
-
nonproduct object
- In System Manager,
an application object that has not been packaged as part of a product.
-
nonprogrammable workstation (NWS)
- A workstation that does not have processing capability and does not allow
the user to change its functions.
-
non-quorum node
- A node in a cluster
that is not counted for the purposes of quorum determination.
-
nonrecoverable data set
- A data set
for which no changes are logged. Neither backout nor forward recovery is provided.
See also forward recovery, backout.
-
nonrecoverable status
- Any resource
status that cannot be recovered after a terminal logoff, a user signoff, or
an IMS restart. Nonrecoverable status only exists while the resource is active
and is deleted when that resource becomes inactive.
-
nonrecoverable transaction
- An inquiry
transaction that is not recovered in the event of a failure.
-
nonreentrant
- A type of program that
cannot be shared by multiple users.
-
nonregistered customer
- A customer
who is not registered with a store. Nonregistered customers are created when
a customer adds something to the shopping cart, but has not yet registered.
-
nonremovable medium
- A recording medium
that cannot be added to or removed from a storage device.
-
nonrepudiation
- (1) In business-to-business
communication the ability of the recipient to prove who sent a message based
on the contents of the message. This can derive from the use of a digital
signature on the message, which links the sender to the message.
- (2) Proof that a transaction occurred or that a message was sent or received.
The use of digital certificates and public key cryptography to digitally sign
transactions, messages, and documents supports nonrepudiation.
-
nonrepudiation data repository
- The
location where WebSphere Partner Gateway stores copies of documents (and authentication
information for signed documents) in case disputes arise regarding the authenticity
of document exchanges.
-
nonresponse mode
- In IMS, a mode of
terminal operation that allows asynchronous operations between the terminal
operator and the application program. See also response
mode.
-
nonrestricted state
- The state of
a system meaning any or all subsystems are active, regardless of whether there
are any active jobs or users at the time.
-
non-retentive data
- Data that the
control program can easily recreate in the event that it is lost. The control
program may cache non-retentive write data in volatile memory.
-
non-root installation
- An installation
performed by a non-root user.
-
non-root instance
- A DB2 instance
created by a non-root user from the DB2 product installed by that user.
-
non-root user
- In Linux and UNIX operating
systems, a user without root privileges.
-
nonscratch volume
- A volume that has
valid or unexpired data on it. See also scratch.
-
nonscrollable cursor
- A cursor that
can be moved only in a forward direction. Nonscrollable cursors are sometimes
called forward-only cursors or serial cursors. See also scrollable cursor.
-
nonsecure interface
- For security
gateways, the physical layer connection between the gateway and a nonsecure
network. See also secure interface.
-
nonsecure network
- A set of nodes
that are not controlled by a single administrative party. See also secure network.
-
nonshared resources (NSR)
- Files with
their own set of buffers and control blocks. See also local shared resource.
-
non-SMS volume
- A volume that is not
controlled by the storage management subsystem (SMS).
-
Non-SNA Interconnection (NSI)
- An
IBM licensed program that provides format identification (FID) support for
selected non-SNA facilities. Thus, it allows SNA and non-SNA facilities to
share SDLC links. It also allows the remote concentration of selected non-SNA
devices along with SNA devices.
-
nonstandard labeled tape
- A tape that
has labels but does not follow IBM labeling conventions.
-
non-static connection
- See dynamic connection.
-
nonstop service
- A service of the
common agent that monitors processes on the common agent to make sure they
are running and available. The service automatically restarts the processes
it monitors.
-
nonswitched connection
- A connection
that does not have to be established by dialing. See also switched connection.
-
nonswitched line
- A connection between
computers or devices that does not have to be made by dialing. See also switched line.
-
non-terminal-related MSDB
- A type
of MSDB characterized by data that is used or updated frequently and segments
that are not owned by specific logical terminals. Direct update of segment
fields is allowed but no insertion or deletion of segments is permitted.
-
nonvolatile random access memory (NVRAM)
- Random access memory (storage) that retains its contents after the electrical
power to the machine is shut off.
-
nonvolatile storage
- A storage device
whose contents are not lost when power is cut off. See also volatile storage.
-
non-VSAM data set
- A data set allocated
and accessed using one of the following methods: basic direct access method
(BDAM), basic partitioned access method (BPAM), basic indexed sequential access
method (BISAM), basic sequential access method (BSAM), queued sequential access
method (QSAM), or queued indexed sequential access method (QISAM).
-
non-VSAM entry
- A catalog entry that
describes a data set that does not use the Virtual Storage Access Method (VSAM).
A non-VSAM entry contains the data set's volume serial number (VOLSER) and
device type. If the data set resides on a magnetic tape volume, the entry
can also identify the data set's file number. When the data set resides on
a direct access device, the operating system obtains further information by
examining the data set's data set control block (DSCB) in the volume's volume
table of contents (VTOC).
-
non-VSAM volume record (NVR)
- A VSAM
volume data set (VVDS) record that contains information about a system-managed
data set that does not use the Virtual Storage Access Method (VSAM) and is
not related to the storage management subsystem (SMS).
-
nonyielding loop
- A type of loop in
which control is returned temporarily from the program to CICS. However, the
CICS routines that are invoked are ones that can neither suspend the program,
nor pass control to the dispatcher. There is, therefore, no point at which
the task can be suspended.
-
no-print border
- A small area on the
edges of a physical page where data will not print. This no-print border is
a limitation of the printer.
-
NOPROMPT mode
- One of two ways to
display a message panel. NOPROMPT mode is only intended for experienced SWIFT
Link users who are familiar with the structure of SWIFT messages. With NOPROMPT
mode, only the SWIFT header, trailer, and pre-filled fields and their tags
are displayed. See also PROMPT mode.
-
no response
- In SNA, a value in the
form-of-response-requested field of the request header that directs the receiver
of the request not to return any response, regardless of whether or not the
request is received and processed successfully. See also definite response, exception response.
-
normal control field
- For the sort
function, any control field that is specified by an N in column 7 of the field
sequence specification.
-
normal disconnected mode (NDM)
- A
nonoperational mode of an unbalanced data link in which the secondary station
is logically disconnected from the data link and, therefore, cannot transmit
or receive information.
-
normal installation
- A process in
which the i5/OS operating system contained on tape is installed in auxiliary
storage, replacing the operating system (if any) that is currently in the
system. See also abbreviated installation.
-
normalization
- (1) The process of restructuring
a data model by reducing its relations to their simplest forms. It is a key
step in the task of buildinga logical relational database design. Normalization
helps avoid redundancies and inconsistencies in data. An entity is normalized
if it meets a set of constraints for a particular normal form (first normal
form, second normal form, and so on). See also denormalization, repeating group.
- (2) The process of
replacing surface form representations with their canonical form. This may
include case normalization, where a capitalized word is replaced by a lowercase
word: 'Run' becomes 'run'; grammatical normalization, where an inflected verb
is replaced by the non-inflected form: 'runs' becomes 'run'; lexicographical
normalization, where Unicode full-width characters is replaced with Unicode
basic form, or white spaces are removed from Chinese text.
- (3) The
conversion of records that contain multivalued data from nonfirst-normal format
(NF2) into one or more first normal format (1NF) rows.
-
normalized form
- A form of a word,
or multiword unit, after it has undergone a process of normalization. The
resulting term can be a lemma or stem.
-
normal job
- A job received in an input
stream.
-
normal number
- In floating-point representation,
any non-zero number that has a non-zero digit as the leftmost digit of the
significand. See also decimal floating-point number, subnormal number.
-
normal priority
- The priority assigned
to a transaction when the number of transactions enqueued and waiting to be
processed is less than the limit count value. See also limit count, limit priority, scheduling priority.
-
normal queue
- In SNADS, a queue that
contains distribution entries with a service level of data low. See also priority queue.
-
normal response mode (NRM)
- An operational
mode of an unbalanced data link in which the secondary station starts transmission
only as the result of receiving explicit permission, by polling, from the
primary station. See also asynchronous balanced mode.
-
normal restart
- The restart of IMS
after a termination initiated by a /CHECKPOINT command. See also emergency restart, cold start.
-
normal transition link
- In a collaboration
template's activity diagram, the line that represents the path between a successfully
executed node for an action, subactivity, or iterator and the next node. See
also exception transition link, transition link.
-
normal XRF operations
- The period
of XRF processing when the active IMS is processing the IMS workload and
the alternate IMS is tracking the active IMS.
-
North American Industry Classification System
(NAICS)
- An economic classification system based on groups of goods
and services that use similar or identical production processes.
-
NOS
- See Notes
object services.
-
nostro correspondent channel
- A type
of clearing channel that is in fact a channel to a partner bank, and is used
for settling nostro accounts at that bank.
-
not-a-number (NaN)
- In binary floating-point
and decimal floating-point concepts, a value, not interpreted as a mathematical
value, that contains a mask and a sequence of digits. See also decimal floating-point number.
-
notation
- (1) A system of characters,
symbols, or abbreviated expressions used to express technical facts or qualities.
- (2) An XML construct that contains a note, a comment or an explanation
about information in an XML file. A notation can be used to associate a binary
description with an entity or attribute.
-
not deterministic function
- See non-deterministic function.
-
note
- A simple data structure that
stores Notes database design elements (forms, views, and so on), user-created
data (documents), and administrative information, such as the database access
control list.
-
note attachment relationship
- In UML
modeling, a relationship that connects a note or text box to a connector or
shape.
-
notebook
- In graphical user interfaces
(GUIs), a control that resembles a tabbed notebook, with multiple pages that
can be accessed individually in any order.
-
note header
- A structure that contains,
among other things, the note's originator ID (OID), which includes the note's
universal ID (UNID); the note ID; the note's parent note, if one exists; the
number of items in the note; and the list of the note's item descriptors.
-
note ID
- A 4-byte value that is assigned
to a note when the note is first created. Note IDs are stored in the record
relocation vector table, which maps a note's note ID to the position with
the database file. A note ID is unique within a database but not across replicas
of the database, meaning that the same note in two replicas can have different
note IDs, even though the replicas have identical UNIDs.
-
Notes application
- The design of a
Notes database. A complex Notes application consists of several individual
database designs that work together to perform a specific task. A typical
Notes application consists of a set of design elements that specify, among
other things, the type of documents in the database, the way that documents
can be indexed and viewed, and the application's logic, which is written in
the Notes Formula Language, LotusScript, Java, or JavaScript.
-
Notes client
- Client software that
allows users to access Notes databases on a Domino server, send mail, and
browse the Web.
-
Notes database
- A single file that
physically contains both a set of documents and a copy of the application
design elements that control the creation and modification of those documents.
A database can be shared, local, or remote.
-
Notes/Domino authentication
- A security
mechanism that verifies that the user or Domino server trying to access a
particular Domino server has a trusted certificate in common with it. Authentication
occurs in both directions: the server authenticates the user; then the user
authenticates the server.
-
Notes/FX
- A technology that lets desktop
applications and Notes share data fields.
-
Notes named network
- A group of Domino
servers that run on the same LAN protocol -- for example, servers running
on TCP/IP in one of an organization's locations. Servers on the same Notes
named network route mail to each other automatically, whereas you need a Connection
document to route mail between servers on different Notes named networks.
-
Notes name service
- The name service
within Lotus Notes and Domino that assists in name-to-address resolution in
NRPC (Notes remote procedure call) by making calls to the Domino Directory
to resolve Domino common names to their respective protocol names.
-
Notes network port
- A port at which
a Notes client or Domino server listens for NRPC (Notes remote procedure call)
connections in a given network protocol -- such as, TCP/IP, NetBIOS, or IPX/SPX.
-
Notes object services (NOS)
- A set
of portable C/C++ functions that create and access information in databases
and files, compile and interpret formulas and scripts, and provide an interface
to operating systems in a consistent, portable way.
-
Notes Remote Procedure Call (NRPC)
- The architectural layer of Notes used for all Notes-to-Notes communication.
Either the HTTP or the SOCKS proxy can be set up to work with NRPC.
-
Notes server
- Application software
that runs on a machine that is connected to a network. The Notes server provides
the following services to Notes clients and other Notes servers: storage and
replication of databases, directory services, mail routing, and security.
-
Notes storage facility
- Part of the
Notes Object Services, the Notes Storage Facility is a library of C functions
that implement the most basic database-creation and database-management operations.
-
not fenced
- Pertaining to a type,
or characteristic, of a procedure or user-defined function that is defined
to run in the database manager process. When this type of object is run (using
the not fenced clause), the database manager is not protected from changes
made by this object. See also fenced.
-
not-found indicator
- An indicator
that is set on when the specified record cannot be found.
-
notice
- In a Tivoli environment, a
message generated by a systems management operation that contains information
about an event or the status of an application. Notices are stored in notice
groups.
-
notice group
- In a Tivoli environment,
an application- or operation-specific container that stores and displays notices
that pertain to specific Tivoli functions.
-
notice to receive
- An incoming message
that advises of a credit payment to come. Also called a credit advice.
-
notification
- (1) Information, labeled
as a managed object, that relates to an event that has occurred within the
managed object.
- (2) An unscheduled, spontaneously generated message,
issued by an agent when a significant or critical (data) condition occurs.
- (3) An occurrence within a process that can trigger an action. Notifications
can be used to model conditions of interest to be transmitted from a sender
to a (usually unknown) set of interested parties (the receivers).
- (4) A message that contains the event descriptions that are sent to managed resources,
Web services and other resources.
-
notification broadcaster
- An element
that is responsible for publishing notifications. Notification receivers listen
for these notifications.
-
notification receiver
- An element
that listens for and receives notifications. By default, this element starts
listening when its owning process starts.
-
notify delivery
- The method of delivering
messages to a message queue in which the work station user is notified that
a message arrived. The signal is a light or an audible alarm.
-
notify message
- A message that describes
a condition for which a program requires a reply from the calling program,
or for which a reply is automatically sent to the program.
-
notify object
- A message queue, a
data area, or a database file that contains information identifying the last
successful commitment operation. This information can be used by the programmer
to find a restarting point for an application following an abnormal end to
the system or routing step processing.
-
notify subtask (NST)
- (1) A PSF subcomponent
that returns processed data sets to JES or Direct Printer Services Subsystem
and performs checkpoint processing on data sets as they are printed.
- (2) An external trace that contains information pertaining to the releasing
and checkpointing of data sets by PSF.
-
not ready
- Pertaining to a status
where all images in the image catalog are not available for use by the virtual
optical device. The status of the individual image catalog entry images in
the image catalog reflects either the last status for the catalog before being
made not ready from ready or the future status for catalogs about to be made
ready. The image catalog can be made not ready by using the LODIMGCLG command
with OPTION(*UNLOAD).
-
not-variant function
- See deterministic function.
-
NPALU
- See network performance analysis logical unit.
-
NPDA
- See Network
Problem Determination Application.
-
NPDU
- See network-layer
protocol data unit.
-
NPF
- See Network
Print Facility.
-
NPM
- (1) See NetView
Performance Monitor.
- (2) See Network Printer
Manager.
-
N_port
- See node port.
-
NPRO
- See nonprocess
runout.
-
NPSI
- (1) See nonpartitioned
secondary index.
- (2) See X.25 NCP Packet
Switching Interface.
-
NPV
- See net
present value.
-
NR
- See negative
response.
-
NRF
- See network
routing facility.
-
NRM
- See normal
response mode.
-
NRPC
- See Notes
Remote Procedure Call.
-
NSAP address
- In OSI, an address that
identifies a service access point in the network layer. NSAP addresses must
be unique within the OSI network where they are used. NSAP addresses are assigned
by naming authorities.
-
NSAP nickname
- In OSI, a nickname
that identifies an NSAP address.
-
NSD
- See Network
Shared Disk.
-
NSDU
- See network-layer
service data unit.
-
NSD volume ID
- A unique, 16-digit,
hexadecimal number that is used to identify and access all Network Shared
Disks (NSDs).
-
NSF
- See National
Science Foundation.
-
NSFNET
- See National Science Foundation Network.
-
NS header
- See network service header.
-
NSI
- (1) See name
service interface.
- (2) See Non-SNA Interconnection.
-
NSI profile attribute
- In DCE Remote
Procedure Call (RPC), an RPC-defined attribute (NSI attribute) of a name service
entry that stores a collection of RPC profile elements and identifies the
entry as an RPC profile.
-
NSM
- See Network
Status Manager.
-
NSR
- See nonshared
resources.
-
NST
- See notify
subtask.
-
NT
- See network
termination.
-
NT1
- See network
termination 1.
-
NT2
- See network
termination 2.
-
NTFS
- One of the native file systems
in operating environments such as Windows 2000.
-
NTIA
- See National
Telecommunications and Information Administration.
-
NT mode
- A mode in which attachment
to the ISDN network is asymmetric. The network side of the connection operates
in NT mode. User equipment operates in terminal equipment, or TE, mode.
-
NTSC
- See National
Television Standard Committee.
-
NTT
- See network
topology template.
-
nucleus
- (1) That portion of the CICS
region that holds the CSA, management modules, control tables, and resident
application programs.
- (2) That portion of a control program that always
remains in central storage.
-
nucleus initialization program (NIP)
- The MVS component that initializes the resident control program.
-
nucleus load table (NLT)
- A table
that enables you to utilize virtual storage efficiently, by creating a load
order that provides the smallest possible working set. The table is used by
CICS to control the load order of the CICS nucleus. It allows you the option
of changing the default load order established by the CICS system initialization
program.
-
nucleus server
- A MERVA component
that processes a service request as selected by the request queue handler.
The service a nucleus server provides and the way it provides it is defined
in the nucleus server table (DSLNSVT).
-
NUI
- See network
user identification.
-
NUI service facility
- In X.25, a facility
sent by the data terminal equipment (DTE) to the network in call setup packets
that contain a network-assigned identifier, which can be used for billing,
security, or network management purposes. The NUI service facility can also
be used to select specific optional facilities to be associated with a virtual
call.
-
NUL
- See null
character.
-
NULL
- (1) In the C and C++ languages,
a pointer that does not point to a data object.
- (2) In the C programming
language, a single character that denotes the end of a string.
- (3) In SQL, the value denoting the absence of data for a particular row and column.
-
nullable
- The condition in which a
value for a column, function parameter, or result can be absent.
-
null-capable field
- A field whose
value can be null.
-
null character (NUL)
- A control character
with the value of X'00' that represents the absence of a displayed or printed
character. See also space.
-
null clause
- In REXX, a clause consisting
of only blanks, comments, or both. A null clause is ignored.
-
null credential
- A type of credential
that is usually associated with diskless workstations. Because there is no
repository of information that is local to the workstation, it is not possible
to obtain identifying information.
-
null name
- In PSF, a token name with
X'FFFF' in the first 2 bytes.
-
null output message
- The message IMS
sends to a terminal when no other output is immediately available to satisfy
terminal requirements.
-
null pointer
- The value that is obtained
by converting the number 0 into a pointer; for example, (void *) 0 . The C
and C++ languages guarantee that this value will not match that of any legitimate
pointer, so it is used by many functions that return pointers to indicate
an error.
-
null record
- In binary synchronous
communications, a record that contains no data, only the data link control
characters STX ETX.
-
null resource
- In the NetView Graphic
Monitor Facility, an object that is used only as an aid in formatting and
drawing a view. A null resource always shows the status "unknown."
-
null statement
- (1) A statement that contains
only the delimiter symbol, but no characters.
- (2) A statement that
consists of a semicolon.
-
null string
- (1) A character or bit string
with a length of zero.
- (2) A string containing no element.
-
null-terminated
- Pertaining to a character
string that ends with a zero byte.
-
null-terminated host variable
- A varying-length
host variable in which the end of the data is indicated by the presence of
a null terminator.
-
null terminator
- In C, the value that
indicates the end of a string. For EBCDIC, ASCII, and Unicode UTF-8 strings,
the null terminator is a single-byte value (X'00'). For Unicode UTF-16 and
UCS-2 (wide) strings, the null terminator is a double-byte value (X'0000').
-
null value
- A parameter position for
which no value is specified.
-
null wide-character code
- A wide-character
code with all bits set to zero.
-
number
- In REXX, a character string
consisting of one or more decimal digits optionally preceded by a plus or
minus sign, and optionally including a single period that represents a decimal
point. A number can also have a power of 10 suffix in conventional exponential
notation: an E (uppercase or lowercase) followed optionally by a plus or minus
sign then followed by one or more decimal digits defining the power of 10.
-
number sign
- The character #, which
is also referred to as the hash sign.
-
numeric
- Pertaining to any of the
digits 0 through 9.
-
numeric character
- See digit.
-
numeric character reference
- See character entity reference.
-
numeric constant
- (1) The actual numeric
value to be used in processing, instead of the name of a field containing
the data. A numeric constant can contain any of the numeric digits 0 through
9, a sign (plus or minus), and a decimal point. See also character constant.
- (2) A constant that expresses an integer,
a real number, or a complex number.
-
numeric data
- Data represented by
numerals.
-
numeric digit
- In REXX, a pattern
that specifies, by column number, how input data is to be parsed.
-
numeric edited item
- In COBOL, a numeric
item whose PICTURE character-string contains valid editing characters.
-
numeric expression
- A numeric constant,
a simple numeric variable, a scalar reference to a numeric array, a numeric-valued
function reference, or a sequence of the above, separated by numeric operators
and parentheses.
-
numeric field
- An area that is reserved
for a particular unit of information and that can contain only the digits
0 through 9. See also character field.
-
numeric item
- In COBOL, a data item
that must be numeric. If signed, the item can also contain a representation
of an operational sign.
-
numeric operator
- A symbol representing
an operation to be performed on numeric data, such as + or - to indicate addition
or subtraction.
-
numeric pattern
- In REXX, a pattern
that specifies, by column number, how input data is to be parsed.
-
numeric variable
- The name of a numeric
data item whose value is assigned or changed during program processing.
-
N-up
- The partitioning of a side of
a sheet into a fixed number of equal size partitions. For example, 4-up divides
each side of a sheet into four equal partitions.
-
NVR
- See non-VSAM
volume record.
-
NVRAM
- See nonvolatile random access memory.
-
NVT
- See network
virtual terminal.
-
n-way
- Any valid configuration of
processors for a system that is capable of supporting 1 to n processors.
-
n-way processor architecture
- A processor
architecture that provides expandability for future system growth by allowing
for additional processors. To the user, the additional processors are transparent
because they separately manage the work load by sharing the work evenly among
the n-way processors.
-
NWI
- See network
interface.
-
NWS
- See nonprogrammable
workstation.
-
NWSD
- See network
server description.
-
Nx_port
- A node port that can operate
as either a node port (N_port) or node loop port (NL_port). See also node loop port, node port.
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