list of letters
This site contains terms and definitions from many IBM software and hardware products as well as general computing terms.
M
M&TE
See measuring and test equipment.
- See mandatory access control.
- See mobile active code.
- See message authentication code.
- See Media Access Control.
MAC address
See Media Access Control address.
Macao S.A.R. of China
See Macao S.A.R. of the PRC.
MAC frame
A transmission frame that controls the operation of the IBM Token-Ring Network and any ring station operations that affect the ring.
machine characteristic
Values defined in the computer.
machine check
An error condition that is caused by an equipment malfunction.
machine check handler (MCH)
A feature that analyzes errors and attempts recovery by retrying the failing instruction. If retry is unsuccessful, it attempts to correct the malfunction or to isolate the affected task.
machine check interruption
An interruption that occurs as a result of an equipment malfunction or error.
machine-generated data structure (MGDS)
- An IBM structured data format protocol for passing character data among the various Content Manager ImagePlus for OS/390 programs.
- Data extracted from an image and put into general data stream (GDS) format.
- See computer instruction.
- A binary number that directs the operation of a processor. Compilers and assemblers convert source instructions to machine instructions.
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.
- 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.
- An entry in the Network Installation Management database that represents a machine configuration.
machine-readable
Pertaining to data a machine can acquire or read from a storage device, a data medium, or other source.
machine-readable information (MRI)
All textual information contained in a program such as a system control program, an application program, or microcode. MRI includes all information that is presented to or received from a user interacting with a system. This includes messages, dialog boxes, online manuals, audio output, animations, windows, help text, tutorials, diagnostics, clip art, icons, and any presentation control that is necessary to convey information to users.
machine readable information (MRI)
All textual information contained in a program such as a system control program, an application program, or microcode. MRI includes all information that is presented to or received from a user interacting with a system. This includes messages, dialog boxes, online manuals, audio output, animations, windows, help text, tutorials, diagnostics, clip art, icons, and any presentation control that is necessary to convey information to users. See also machine readable material, presentation control information.
machine readable material (MRM)
Machine readable information (MRI), executable code, and constants. See also machine readable information.
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 state
A state that identifies the machine execution state and control state for each 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.
machine word
See fullword.
MAC protocol
See Media Access Control protocol.
- An instruction that causes the execution of a predefined sequence of instructions.
- A label that is declared at the start of a program or file. The label can then be used to represent the values assigned to the label in the declaration.
- A single object defined by an administrator to automate a series of administration tasks in Contributor.
- In Analyst, a set of commands that have been recorded and grouped together as a single command, which is used to automatically complete a list of instructions in one step.
- 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.
- In REXX, a program that performs certain operations, such as text editor operations, in applications.
macro call
See macro.
macro definition
A named sequence of statements that can be called with a macro instruction.
macro file
A file that contains one or more storage manager administrative commands, which can be run only from an administrative client using the MACRO command.
macroflow
See long-running process.
macroinstruction
See macro.
macro processor
A program that converts macro instructions into specified values.
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 media access control sublayer.
MADS
See multiple area data set.
magazine view
A format for document lists in Workplace in which properties appear in a phrase, such as created by [property] on [date].
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.
- A collection of pointers to message objects that are addressed to a single entity.
- A storage location in a network to which messages for a user are sent.
mailbox restore
A function that restores Microsoft Exchange Server data (from IBM Data Protection for Microsoft Exchange backups) at the mailbox level or mailbox-item level.
mail drop
The file into which messages are first received.
mailer
The program that does the actual delivery of mail.
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.
- In FORTRAN, the default name given to a main program if one was not supplied by the programmer.
- 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.
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 program
A program that performs primary functions, passing control to routines and subroutines for the performance of more specific functions.
mainline routine
The first subroutine encountered when link-editing.
main network address
In VTAM, the logical unit (LU) network address that is used for the SSCP-LU session and certain LU-LU sessions with the LU. See also auxiliary network address.
- The first program unit to receive control when a program is run.
- The first routine in an enclave to gain control from the invoker. See also subprogram.
- The highest level program involved in a run unit.
main service
A dynamic support program (DSP) that provides operator control over jobs.
- The part of internal storage into which instructions and other data must be loaded for running or processing.
- See memory.
- Program-addressable storage from which instructions and other data can be loaded directly into registers for subsequent execution or processing.
main storage database (MSDB)
A root-segment database that can be accessed at the segment level and resides in main storage during execution. See also Fast Path.
main storage dump (MSD)
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.
main system
The system on a multisystem RACF remote sharing facility (RRSF) node that is designated to receive most of the RRSF communications sent to the node.
maintain system history program (MSHP)
A program used for automating and controlling various installation, tailoring, and service activities for a VSE system.
- 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 and operator subsystem (MOSS)
A subsystem of an IBM communication controller, such as the 3725 or the 3720, that contains a processor and operates independently of the rest of the controller. It loads and supervises the controller, runs problem determination procedures, and assists in maintaining both hardware and software.
maintenance and operator subsystem extended (MOSS-E)
A subsystem of the IBM 3745 Communication Controller that operates independently of the rest of the controller. It loads and supervises the controller, runs problem determination procedures, and assists in maintaining both hardware and software.
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 program temporary fix.
maintenance-level keyword
In diagnosing program failures, a keyword that identifies the maintenance level of DFSMSdss.
maintenance level update
The service updates (fixes and enhancements) that are necessary to upgrade the Base Operating System (BOS) or an optional software product to the current release level.
- A state of a node or server that an administrator can use to diagnose, maintain, or tune the node or server without disrupting incoming traffic in a production environment.
- The state in which a product or system can be serviced.
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 service
In SNA, a network service in system services control points (SSCPs) and physical units (PUs). Maintenance service provides facilities for testing links and nodes and for collecting and recording error information. See also session services.
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 device number
A system identification number for each device or type of device. The major device, minor device, and channel numbers uniquely identify a hardware device.
major node
In VTAM, a set of resources that can be activated and deactivated as a group. See also minor node, NCP major node, packet major node.
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.
- See version.
- A document that has been released. The security of a major version makes the document available to a wide range of users. A major version is typically an approved document of record.
make
In VisualAge RPG, the process by which all of the components are compiled and assembled to create a VRPG application.
make command
A statement that can be used to build an application.
- In UNIX, a text file containing a list of an application's parts. The make utility uses makefiles to maintain application parts and dependencies.
- 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.
make salt tool
See salt utility.
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.
malware
Software that is designed to disrupt or gain unauthorized access to a system, gather information that compromises a person's privacy or assets, or other behavior that is harmful to the user.
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)
- The composition of one or more manageability capability interfaces. (OASIS)
- 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 manager, effector, management topic, sensor, touchpoint.
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 deployment environment
A set of server components that are used to test and deploy applications in a controlled environment.
managed destination
A queue that is provided by the queue manager, as the destination to which published messages are to be sent, for an application that elects to use a managed subscription. See also managed subscription.
- A non-node device for which Cluster Systems Management supports power control and remote console access.
- A device that is assigned to a managed set.
managed disk (MDisk)
A Small Computer System Interface (SCSI) logical unit (LU) that a Redundant Array of Independent Disks (RAID) controller provides and a clustered system manages. The MDisk is not visible to host systems on the storage area network (SAN).
managed disk group
See storage pool.
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 file
A library item that is created outside of IBM Process Designer and that is part of a process application, such as an image or Cascading Style Sheet (CSS). Creating managed files ensures that all required files are available and installed when a project is ready for testing or production.
managed group
A group of systems or objects managed by IBM Director.
managed handle
An identifier that is returned by the MQSUB call when a queue manager is specified to manage the storage of messages that are sent to the subscription.
managed host
A host that is managed by Tivoli Storage Productivity Center and one or more active, in-band, fabric agents.
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.
- An access mode that enables virtualization functions to be performed. See also access mode, image mode, unconfigured 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.
- A node that is federated to a deployment manager and contains a node agent and can contain managed servers. See also node.
- 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.
- In a Tivoli environment, a computer system on which Tivoli Management Framework is installed.
- A definition in the database of a managed server that was distributed to the managed server by a configuration manager. When a managed server subscribes to a profile, all objects that are associated with that profile become managed objects in the database of the managed server.
- 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 class
An identified set of managed objects sharing (a) the same identified sets of attributes, notifications, and management operations (packages) and (b) the same conditions for presence of those packages.
Managed Object Format (MOF)
A language for defining Common Information Model (CIM) schemas.
managed object ID
A unique identifier for each managed object.
managed private cloud
A cloud computing environment that is enterprise owned and operated by another company. The customer owns and pays for infrastructure and has unlimited exclusive access.
- An entity that exists in the runtime environment of an IT system and that can be managed. See also effector, monitor component, sensor.
- In a Tivoli environment, a database object that represents a resource and is governed by policies. See also autonomic computing distributed infrastructure, resource.
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.
- A server that receives configuration information from a configuration manager using a subscription to one or more profiles. Configuration information can include definitions of objects such as policy and schedules. See also configuration manager, enterprise configuration, profile, subscription.
- A server within a managed node, to which SCA modules and applications can be deployed.
managed set
A collection of devices that are defined to allow operations to be performed on multiple devices. The devices in the managed set might have different hardware types, firmware levels, and license features.
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 subscription
A subscription for which the queue manager creates a subscriber queue to receive publications because the application does not require a specific queue to be used. See also managed destination.
managed synchronization
The use of mapping files to synchronize a local z/OS project with a remote system.
managed system
A system that is being controlled by a given system management application. See also dynamic LPAR, Hardware Management Console.
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.
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 by subscription
In a Tivoli environment, the concept of managing network resources by creating sets of profiles and distributing the profiles (through profile managers) to physical entities (Tivoli resources), called subscribers.
Management Center
In WebSphere Commerce, a suite of tools that support store management, merchandising and marketing tasks for business users.
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
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. See also bind, copy group, hierarchical storage management client, policy set, rebind.
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.
- A component of the system that is installed on a single machine to coordinate the system. The user logs in to the management console to start or schedule project runs and to view results and reports. The management console issues instructions to agents to complete jobs.
- A system (server, desktop computer, workstation, or mobile computer) on which IBM Director Console is installed.
management control point
See management server.
- 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. See also peer domain.
- 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.
- 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)
- In the Simple Network Management Protocol (SNMP), a database of objects that can be queried or set by a network management system. See also Simple Network Management Protocol.
- 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. See also MIB module.
management module
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 node
A node used for configuring, administering, and monitoring a system.
management plan
A set of tasks that modify a service deployment instance.
management policy
A policy that determines the degree of control the user has over password injection. See also application policy.
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.
- A server on which the systems management software runs.
- 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.
- A distributed process that controls runtime processing. All data management service requests are sent through the management server, which then sends requests to agents configured for the server.
- The server and logical partition (LPAR) that are configured to manage Cluster Systems Management nodes.
- The hardware component of Tivoli Service Automation Manager on which the product and its prerequisite middleware reside.
- The server on which IBM Director Server is installed.
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. See also session services.
management services focal point (MSFP)
For any given management services discipline (for example, problem determination or response time monitoring), the control point that is responsible for that type of network management data for a sphere of control. This responsibility may include collecting, storing, or displaying the data, or all of these. (For example, a problem determination focal point is a control point that collects, and that may store or display, problem determination data.) See also focal point.
management services unit (MSU)
A generic term for major-vector encoded management services data, regardless of the method used to transport the data. Thus, the management services unit includes major vectors transported within the network management vector transport (NMVT), the control point management services unit (CP-MSU), or the multiple-domain support message unit (MDS-MU). See also control point management services unit.
management station
In Internet communications, the system responsible for managing all, or a portion of, a network. The management station communicates with network management agents that reside in the managed node by means of a network management protocol, such as the Simple Network Management Protocol (SNMP).
management topic
A set of operations and data elements that define a manageability interface for a managed resource. See also manageability interface.
management TOR switch
A top-of-rack switch that provides a private network connection between an IBM System z 196 (z196) Support Element (SE) and a IBM System z BladeCenter Extension (zBX). See also top-of-rack switch.
management VLAN
See service network.
- 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.
- The part of a distributed management application that issues requests and receives notifications; that is, uses the services of one or more agents.
- In systems management, a user who, for a particular interaction, has assumed a manager role.
- See managing process.
- An entity that monitors or controls one or more managed objects by (a) receiving notifications regarding the objects and (b) requesting management operations to modify or query the objects.
- In IBM ILOG JViews, a container for grouping graphic objects and for coordinating their behavior and display in multiple layers and views.
- A system that assumes a manager role.
Manager class
In AIXwindows, a metaclass that provides the resources and functionality to implement certain features, such as a keyboard interface and traversal mechanism. It is built from the Core, Composite, and Constraint classes.
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 Feedback Program
An annual program that gives employees the opportunity to provide feedback to their managers.
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.
manager role
In systems management, a role assumed by a user where the user is capable of issuing management operations and of receiving notifications.
manager view
The Abstract Window Toolkit (AWT) component where the graphic objects of a manager are displayed.
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.
managing system
In systems management, an open system containing a user that can assume the manager role.
man command
In UNIX-based operating systems, a command that displays the specified man page.
mandatory access control (MAC)
A means of restricting access to objects on the basis of the sensitivity (as represented by a label) of the information contained in the objects and the formal authorization (clearance) of subjects to access information of such sensitivity. See also discretionary access control.
mandatory cryptographic session
See required cryptographic session.
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 fill field
A field that a user must leave blank, or must fill in completely.
mandatory mode
A mode of remote mirroring in which I/O operations stop when the communication between the master and secondary volumes is broken. See also best effort mode.
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.
mandatory value profile
A user profile in zSecure Command Verifier that specifies and enforces the specific owner and default group of a new ID that is added to the RACF group hierarchy.
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.
- A shipment confirmation that may contain tracking identification information.
- A file that describes the resources, the location of supporting artifacts, application prerequisites, and services that are included in a bundle to deploy part or all of an application.
- An XML file that describes the content of an entire migration package and that facilitates the deployment of the package in a target Maximo environment.
- A special file that can contain information about the files packaged in a JAR file. (Sun)
- A list of data about a server that has been gathered by a collector. Manifest data is used by selectors to choose servers. Manifests for servers can be updated automatically or manually.
manifestation relationship
In UML modeling, a relationship that shows that an artifact implements a node.
manifest file
In Informix, an ASCII file, which must not be customized, that is automatically created during installation of a database server instance. The file contains a history of installation activity. See also response file.
man-in-the-middle attack
An intrusion in which an attacker intercepts messages between a user and a website in order to observe and record transactions.
manipulation
A modification by an attacker of a data element, group of elements, action, or group of actions based on one or more properties. For example, modification of input by removing a required argument, or performing steps out of order.
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 emulator, programmatic emulator.
manual explore
The process of manually crawling a web application to access and test parts of the site that are dependent on input from a real user.
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.
- 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.
- An operating mode in which an administrator must manually initiate deployment requests on applications or application tiers.
- 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.
manual reporting
Workstation reporting in which events that have taken place are manually reported to Tivoli Workload Scheduler for z/OS. This type of reporting requires that some action be taken by a workstation operator. Manual reporting is usually performed from a list of ready operations.
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 the base product plus new function and cumulative fixes. See also interim fix, refresh pack, test fix.
- To associate a source to a target in a message map.
- In the EJB development environment, the specification of how the container-managed persistent fields of an enterprise bean correspond to columns in a relational database table or other persistent storage.
- A data structure that maps keys to values.
- A set of related submaps that provides a graphical and hierarchical presentation of a network and its systems.
- To correlate fields in a Java class to columns in a relational database table or other persistent storage.
- 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).
- A collection of attribute-to-attribute mappings. See also mapping.
- A file that defines the transformation between sources and targets.
- 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.
- See message addressing property.
- See Market Alignment Program.
- See maintenance analysis procedure.
- See mobile application part.
- See Manufacturing Automation Protocol.
map chaining
The process of producing multiple documents from a single document by executing several maps to translate the single document.
map component
An Integration Flow Designer object that encapsulates a reference to an executable map, along with its execution settings. There are three types of map components: source, compiled, and pseudo.
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.
map feature
An object that represents a cartographic data as it was read from its source file. It can be a segment of road, an aerial image, the summit of a hill, or a digital terrain model. A map feature holds three main information fields: its geometry, the projection in which its geometry is expressed, and its attributes.
MapInfo Interchange File format (MIF format)
An ASCII text based file format for describing maps.
map layer
An object that defines the look and feel of part of a map background. A map layer contains a data source and its associated styling information, such as zoom levels, grids, properties, and so on. A set of map layers constitutes a theme.
map loader
A facility that is supplied with JViews Maps to import a map into a JViews manager that has a predefined format. Predefined formats in ILOG JViews are CADRG, DTED, and Shapefile.
map object
An object used in the TX Programming Interface that represents an instance of a map in the program memory.
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.
mapped expression
Part of an SQL statement that is used to retrieve data from a data connection for a field in a business object.
mapped file
A file that can be accessed through direct memory operations instead of being read from disk each time it is accessed.
mapped user name
An operating system identity for users who do not have operating system user accounts. The mapped user name is either mapped to an operating system account or to a default set of properties.
mapper
A function that records errors from resources attached to a communication controller or from certain channel-attached devices.
- A set of expressions that define how to create data in the target database using data from a source. See also data source, integration adapter, target database.
- A list, usually in a profile, that establishes a correspondence between items in two groups. For example, a keyboard mapping can establish what character is displayed when a certain key is pressed.
- The act of developing and maintaining a map.
- In Enterprise Service Tools, the act of the user who models data transformation between an output message (represented by output terminal on one node) and an input message (represented by an input terminal on another node).
- The correlation of attributes between specifications. For imports, mappings relate the attributes of the file specification to the attributes of the primary specification of the catalog or hierarchy. For exports, mappings relate the attributes for the primary specification to the attributes of the destination specification. See also map.
- The process of transforming data from one format to another.
- A target value expression.
- The relationship between fields in different abstractions of event and action objects.
- In BMS, the process of transforming field data to and from its displayable form.
- A representation of one thing to another.
- The process of defining the relationship between components to enable the flow of data from a data source to fact build or reference structure.
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 expression
An expression that determines how Integration Composer transforms data instances in the original data source to a data instance in the target data source.
mapping file
A file that provides predefined mapping expressions to use to transform data instances in the original data source to data instances in of the target data source.
- 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.
- A function of AFP Utilities that maps a database field value to an object name.
mapping program
An exit program used to interpret routing tags, to specify the subject of an email, to add text to the beginning of an email, to specify the path to store the PDF stream file, and more. See also intelligent routing, mapping object, PDF subsystem.
mapping specialist
The person responsible for creating data transformation maps, validation maps, and functional acknowledgment maps using the Data Interchange Services client.
- 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.
- 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.
map projection
A type of transformation which converts a three-dimensional geographic coordinate system to a two-dimensional flat projected coordinate system on the basis of mathematical formulas.
map record
The record that maps the tracks dumped by DFSMSdss.
map rule
An expression that evaluates to data and produces the required output. A map rule is entered on an output card in the Map Designer and cannot be longer than 32KB.
map set
In basic mapping support (BMS), one or more maps combined in a map set. Using a map set means that you can 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
The left and right borders of text on a screen or hardcopy page.
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.
- In computer graphics, a glyph with a specified appearance that is used to identify a particular location.
- In the GDDM function, a symbol centered on a point. Line charts may use markers to indicate the plotted points.
- A visual symbol within a non-interactive pane indicating the location of the cursor when the pane was last interactive.
marker bar
The gray border at the left of the editor area of the workbench, where bookmarks and breakpoints are shown.
marker record
The name of a class used for physical records in records manager.
Market Alignment Program (MAP)
See also Strategic Sales Model, Territory Optimization Program.
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 websites 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 experiment
A type of experiment that enables Marketing Managers to run alternative paths within existing web activities to determine whether small changes might improve the effectiveness of a web 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.
Marketing tool
A feature in Management Center to create and manage activities that support a site's marketing campaigns. Marketing Managers can use the tool's extensive features to deliver targeted marketing messages to customers on store pages, or using email or mobile text messages.
marketplace
A business-to-business e-commerce website 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.
- An object that combines metadata behavior with access control behavior in a way that allows an object's access control to change by changing a property value.
- A method of updating certain structured fields to identify a resource as printer-resident.
- 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.
marking set
A container for markings, associated with a property template that can be used to add a property to one or more classes.
markup
Characters or other symbols that are inserted in a text or word processing file to indicate how the file should look when it is printed or displayed or to describe the document's logical structure.
markup language
A notation for identifying the components of a document to enable each component to be appropriately formatted, displayed, or used. XML is a markup language.
mark weight (MW)
A weight that is used in Arabic sorting to accommodate special needs of the Arabic script. See also alphanumeric weight, case weight, diacritical weight, indifferent weight, special weight.
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.
- To copy data into a remote procedure call (RPC) packet by using a stub. See also unmarshal.
- To convert an object into a data stream for transmission over a network.
marshalling
See serialization.
MAS configuration
See multi-access spool configuration.
mashup
A graphical interface that features two or more reusable web applications (widgets) presenting seemingly disparate data in an understandable combination for a specific purpose.
- A pattern or template that is applied to an Internet Protocol (IP) address to specify which bits are significant and which bits are irrelevant.
- A pattern of bits or characters that controls the keeping, deleting, or testing of portions of another pattern of bits or characters.
- A tool used to provide protection against casual viewing of a password that has been defined or altered, when an encryption function is not available.
- Data that is used to extract information that is stored in another location.
- To use a pattern of characters to control retention or elimination of portions of another pattern of characters.
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.
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 database partitioning, interpartition parallelism.
mass updating
A function of the Application Description dialog in which a large update to the application database can be requested.
master
In a multi-MVS configuration, a region that issues commands to dependent regions at takeover time. See also coordinator.
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.
- 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.
- The main catalog containing all products, SKUs, descriptions, and standard pricing for each product. See also online catalog, sales catalog.
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 CQS
The Common Queue Server (CQS) that coordinates a sysplex-wide task. The other CQSs that share 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 ends the task.
master cryptography key
In SNA products, a key that is used to encipher operational keys that are to be used at a node.
- The database that contains application data tables.
- In an RSR environment, a database at the active site. If a remote takeover occurs, the shadow database becomes the master database.
master domain manager (MDM)
An installed component that performs the role of management hub of the top-level domain in the Tivoli Workload Scheduler network. It maintains the database of all scheduling objects in the domain and the central configuration files, as well logs and reports for the network. The master domain manager generates the plan and creates and distributes the Symphony file. See also backup master domain manager, command-line client, domain.
master dump table
A structure containing dump table entries generated by kernel components. The dump program uses this table to locate data structures that should be included in a dump.
- A collection of permanent information, such as a file of customer addresses.
- A file that is used as an authority in a given job and that is relatively permanent, even though its contents may change.
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 primary data set
The first data set activated in the primary RACF database. See also primary data set.
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 calendar
A view that displays timelines for all of the releases that are defined in the environment. The view provides general release information as well.
- In ClearCase MultiSite, the replica at which a mastered object can be modified or instances of the object can be created.
- 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.
master replicate
An Enterprise Replication replicate that guarantees data integrity by verifying that replicated tables on different servers have consistent column attributes. See also replicate, shadow replicate.
masters catalog
A service that lists and manages course masters.
master schema definition
A physical model of the inferred properties that is generated out of the data selected. It reflects the inferences of the data instead of the original definitions of the metadata.
master server
In a network installation environment, the server that has permissions to execute commands on all other machines in the environment. The master server is designed to manage the network, client, and resource objects in the network installation database.
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.
- 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.
- The MVS system on which the master DFSMSrmm control data set (CDS) resides.
- A table that exists to define the range of an entity in a relational database. For example, a product master table would provide information about all the products of a company.
- 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.
- The IMS logical terminal that has complete control of IMS resources during online operations.
- 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.
- A private volume that contains data that is available for write processing.
- A volume that has snapshots.
- In most cases, the volume that contains a production copy of the data and that an application accesses. See also auxiliary volume, relationship.
- The first volume assigned to the system storage pool that stores the most critical system metadata.
match description
A description used to automatically match source and target dimension items with the same name. In addition, match descriptions can be used to perform an allocation by date.
Match Designer database
A database that stores the results of match test passes that are generated by InfoSphere QualityStage.
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 is defined by multiple instances of a software signature.
match engine
A program that identifies groups of load modules or executable files in the Inquisitor tables as belonging to certain products.
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
In MPTN architecture, pertaining to the relationship between peer transport users or peer transport providers that use the same user protocols or the same transport protocols.
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.
match merge rule
See resolution rule.
match pattern
The name of an element, an attribute, or other valid XPath target in a source document.
- 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.
- To put rows from a view or nested table expression into a work file for additional processing by a query.
materialized query table (MQT)
A base 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.
mathematic operator
A built-in function that performs a mathematic operation on two values. The mathematic operators are +, -, *, / and %. See also operator.
- A rectangular array of elements arranged in rows and columns that can be manipulated based on matrix algebra rules.
- In computers, a logic network in the form of an array of input and output leads with logic elements joined at some of their intersections.
matrix stack
In GL, a stack of matrices with hardware and software support.
matronymic
A name element that is derived from the name of a person's mother or other female ancestor.
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.
Maximo business object (MBO)
A standardized data entity within Maximo.
maximum burst size (MBS)
The maximum number of cells that an asynchronous transfer mode (ATM) endsystem can transmit at the peak cell rate. See also peak cell rate, sustainable cell rate.
maximum instructions per transaction
The number of system instructions per transaction that the instruction sheet interpreter (ISI) process will execute before temporarily storing the work item in the ISI queue.
maximum operations per transaction
The number of database operations per transaction that the instruction sheet interpreter (ISI) process will execute before temporarily storing the work item in the queue.
maximum possible score
A score that describes the maximum of the maximum scores of all individual scorecards. The maximum possible score is a complex scorecard property, its value should be the same in all the scorecards used in a complex scorecard.
maximum score
The upper limit in a given interval for an attribute that is used in determining reason code assignment. Typically used for linear and logistic models where variable interaction is controlled.
maximum SSCP rerouting count
The maximum number of times that a session initiation request will be rerouted to intermediate system services control points (SSCPs) before the request reaches the destination SSCP. This count is used to prevent endless rerouting of session initiation requests.
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.
maximum workspace
The amount of memory reserved for Analyst. The maximum workspace may be changed to allow larger models to run more effectively.
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.
M-bit
See more-data bit.
- See Maximo business object.
- See message backout table.
- See megabytes per second.
- See megabyte per second.
MBS
See maximum burst size.
mbuf
A small (256-byte) buffer provided by the mbuf management facility to the various layers of communication software in AIX.
MCAST
A proprietary transfer protocol of Tivoli Provisioning Manager for OS Deployment that delivers the same file to several target computers using multicast. See also PCAST, unicast.
MCB
See message control block.
MCDS
See migration control data set.
MCH
See machine check handler.
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.
MCT
See monitoring control table.
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.
- See modify current plan.
- See metadata controller.
MDC table
See multidimensional clustering table.
- See multiple device file.
- See main distribution frame.
MDH
See migration data host.
MDisk
See managed disk.
MDist
See multiplexed distribution.
MDL
See Model Definition Language.
MDM
See master domain manager.
MDR
See miscellaneous data record.
- See multiple-domain support.
- See main device scheduler.
MDS-MU
See multiple-domain support message unit.
MDSP
See Mobile Data Synchronization Protocol.
MDSS
See Mobile Data Synchronization Service.
MDT
See modified data tag.
MDX
See Multidimensional Expression Language.
mean time between failures (MTBF)
- The average time in seconds between the recovery of one incident and the occurrence of the next one.
- 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.
- The average number of seconds between an incident and service recovery.
- The average time it takes to make a system operational after a failure.
- A measure of serviceability indicating the expected time required to repair a unit after failure.
- See mean time to recovery.
- A performance indicator that is quantifiable and used to determine how well a business is operating. For example, measures can be Revenue, Revenue/Employee, and Profit Margin percent.
- 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 numeric value in a column.
- A value that can be analyzed, such as the number of defects.
- A metric combined with an aggregation type such as average, count, maximum, minimum, sum, or average. See also aggregate metric.
measure element
An element in the transformation model that represents a business measure.
measure folder
A folder that groups measures from a model into logical groupings. A measure folder can contain measures, and it can be a measure and have a value.
measurement point
A record that defines the acceptable upper and lower conditions and performance limits for a point or place on a piece of equipment.
measurement set
A component of the configurable service for a MedicalDeviceInput node that contains one or more measurements and specifies the device type that can be used.
measurement source
The source application where a measurement originates.
measuring and test equipment (M)
A calibrating tool that has a higher degree of accuracy than the asset being calibrated.
- A pattern that provides a common solution to a common problem in a given context.
- 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.
- Magnetic disks, magnetic tapes, compact discs (CDs), and digital video disks (DVDs).
- 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.
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.
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.
- In a local area network, the part of the data link layer that applies a medium access method. The MAC sublayer supports topology-dependent functions and uses the services of the physical layer to provide services to the logical link control 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.
media access method
The method for determining which device has access to the transmission medium at any time.
media access port
A hardware-addressable component (such as a communication adapter) of a node that gives the node access to a transmission medium and enables data to pass into and out of the node.
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 control interface (MCI)
An interface that is used to control multimedia devices. Each device must have an MCI driver that implements a standard set of MCI functions. Also, each MCI driver can implement functions that are specific to a particular device.
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 and Linux 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.
- The first hardware addressable point on the physical sheet.
- One of the four corners of the physical medium (usually paper) where printing begins.
- 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.
- In a z/OS environment, a program that provides access to z/OS disk and tape storage for Tivoli Storage Manager servers that run on operating systems other than z/OS.
- An AIX-based component of the Content Manager system that is used for storing and accessing video files.
- 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.
- 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. See also message flow.
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 framework
A mechanism that supports creation of mediation flows through the composition of mediation primitives.
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 policy
A policy that is held in a registry and is applied to a Service Component Architecture (SCA) module. The mediation policy enables mediation flows, which are in the module, to be configured at run time by using dynamic properties.
mediation policy attachment
An attachment that is a prerequisite for using the mediation policy and gate conditions on the mediation policy.
mediation primitive
The building blocks of mediation flow components.
mediation service
A service that intercepts and modifies messages that are passed between client services (requesters) and provider services.
mediation subflow
A preconfigured set of mediation primitives that are wired together to create a common pattern or use case. Mediation subflows run in the context of a parent flow, and can be reused in mediation flows or in subflows.
mediator DSA
A type of data source adaptor that allows data provided by third-party systems, devices, and applications to be accessed.
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.
- The material on which computer information is stored. Examples of media are diskettes, CDs, and tape.
- A physical carrier of electrical energy.
Medium Access Control
See Media Access Control.
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 page overlay.
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
A measure of bandwidth on a data transmission medium, where 1 Mbps = 1,000,000 bits per second. 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.
megabyte per second (MBps)
A unit of data transfer rate equal to 1,048,576 (220) bytes per second.
megabytes per second (MBps)
A unit of data transfer rate equal to 1024 * 1024 bytes.
megahertz (MHz)
A unit of measure of frequency. One megahertz equals 1 000 000 hertz.
- A data object in a structure, a union, or a library.
- A field or method of a class.(Sun)
- A user who has no administrative rights and has access to one or several workspaces.
- In the Type Designer, a single occurrence of a component in a group in a type tree. If a component has a range, each occurrence of that component might be referred to as a member of a series.
- A single database manager process that runs DB2 server software on a physical or logical host. See also guest member, resident member.
- A person, group, or organization known to the system. A member can be a user, an organization, an organization unit, or a member group.
- A unique item within a hierarchy. For example, Camping Equipment and 4 Man tent are members of the Products hierarchy. See also category, dimension item, member unique name.
- In SQL, a component of an opaque data type that can be accessed by an SQL statement by using a user-defined accessor function.
- A node in a dimension or reference structure.
- In multidimensional clustering, the element of a dimension. See also dimension.
- A partition of a partitioned data set (PDS) or partitioned data set extended (PDSE).
- In IBM i, one of several different sets of data, each with the same format, within one database file.
- A C++ data object or function in a structure, union or class. Members can also be classes, enumerations, bit fields and type names.
- 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.
member crash recovery
In a DB2 pureCluster instance, the process of recovering the database transactions after a member failure. Recovery is done using the log stream of a single member and ensures consistency of the transactions in the log stream. See also group crash recovery.
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 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.
- 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.
- The z/OS XCF identifier for a particular DB2 for z/OS subsystem in a data sharing group.
member profile
A profile that defines a member and security level for that member.
member restart
The act of restarting a member after a member failure and performing member crash recovery on each database in the DB2 pureCluster instance. See also group restart.
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.
membership protocol
A mechanism whereby all cluster managers running in a cluster determine which nodes are members of the cluster and handle membership transactions.
member system
Any one of the z/OS system images in a multisystem RRSF node.
member unique name (MUN)
A path of member names, one from each level in a hierarchy, defining the exact location of the member from either an OLAP data source or a dimensionally modeled relational source. For example, Geography.Europe.France.Paris uniquely identifies Paris, France, distinguishing it from other instances of Paris in the City level. See also category code, member.
memoization
A form of caching. The results of a certain function or computation for specific inputs are stored in memory, for later reuse when the same function is being invoked with the same input.
memorandum macro (mm)
A macro for manuscript preparation and printing that supports the eqn and troff commands or the neqn and nroff commands and features annotation, footnoting, indexing, and tables.
- Program-addressable storage from which instructions and other data can be loaded directly into registers for subsequent running or processing. See also auxiliary storage.
- All of the addressable storage space in a processing unit and other internal storages that is used to execute instructions.
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 some IBM Power Systems servers.
- The means by which the computer system records its state at the time of a failure.
- See dump.
memory flash
See USB flash drive.
Memory Grant Manager (MGM)
A database server component that coordinates the use of memory and I/O bandwidth for decision-support queries.
memory image
The logical layout of the parts of a process in memory.
memory leak
The effect of a program that maintains references to objects that are no longer required and therefore need to be reclaimed.
memory load control
A Virtual Memory Manager (VMM) facility that detects memory over-commitment and temporarily reduces the number of running processes, thus avoiding thrashing.
memory mapped I/O (MMIO)
A method of accessing an input or output port as if it were a memory location.
memory pool
A logical division of memory (storage) that is reserved for processing a job or group of jobs. Synonymous with main storage pool.
memory set
A group of one or more memory allocations from the operating system that are managed by the database manager. Memory in a specific memory set shares common attributes, such as the general purpose for which the memory is used, the expected volatility of the memory, and any constraints on its growth.
memory weight
A relative value that is one of the factors in determining the allocation of physical memory to the shared memory partitions. A higher value relative to the values set for other shared memory partitions increases the probability of the hypervisor allocating more physical memory to the shared memory partition.
MEMS
See Micro-Electric Mechanical System.
menu
A displayed list of items from which a user can make a selection.
- 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.
- 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.
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 pane
The physical window containing a pop-up menu listing a group of options to be chosen by the user.
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.
menu system
An interactive interface that lists related software options in a manner that expedites review and selection by the user.
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.
- To insert records throughout a single output file.
- A process element that recombines multiple processing paths, typically after a decision. A merge brings several alternative paths together.
- To consolidate source data in the transformation model using a specified merge method. Data can be merged for measure elements or attributes.
- 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.
- A point in the process where two or more alternative sequence flow paths are combined into one sequence flow path. No synchronization is required because no parallel activity runs at the join point. BPMN uses multiple incoming sequence flow paths for an activity or an exclusive gateway to perform a merge.
MERGE disk
The virtual disk in the VM operating system that contains program temporary fixes (PTFs) after the VMFMERGE EXEC is invoked.
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 method
The type of calculation to perform when merging data.
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
A network topology in which devices are connected with many redundant interconnections between network nodes. Every node has a connection to every other node in the network.
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.
- A network in which there are at least two nodes with two or more paths between them.
- A self-forming, self-healing, self-routing wireless mobility network.
- One or more linked blocks of data or information, with associated STREAMS control structures containing a message type. Messages are the only means of communicating within a stream.
- 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.
- 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.
- Status information that the engine returns about a build or JobStream execution.
- A communication sent from a person or program to another person or program.
- In Web Services Description Language (WSDL), a single piece of information moving between the invoker and the service that describes which operations the service provides. A message consists of logical parts, each of which is associated with a definition within some type of system.
- An object that depicts the contents of a communication between two participants. A message is transmitted through a message flow and has an identity that can be used for alternative branching of a process through the event-based exclusive gateway.
- An informational event that does not require user action. See also event.
- In UML modeling, a model element that defines a specific kind of communication between participants (roles or objects) in an interaction.
- A formatted transfer unit used to exchange control or payment information.
- A set of data that is passed from one application to another. Messages must have a structure and format that is agreed by the sending and receiving applications. See also category.
- In system programming, information intended for the terminal operator or system administrator.
message addressing property (MAP)
An XML element that conveys addressing information for a web service message, such as a unique message ID, the destination of the message, and the endpoint references of the message.
message affinity
The relationship between conversational messages that are exchanged between two applications, where the messages must be processed by a particular queue manager or in a particular sequence.
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
A process that verifies the identity of the sender and the integrity of the data. In PowerHA SystemMirror, the message is signed and the signature encrypted by a shared (symmetrical) key when the message is sent, and the signature is decrypted and verified when the message is received.
message authentication code (MAC)
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 the name 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 inquiry program run after emergency restart can read the contents of message caches. CICS does not read or purge message caches.
message catalog
An indexed table of messages. Two or more catalogs can contain the same index values. The index value in each table refers to a different language version of the same message.
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 email 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. See also channel.
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. See also Message Queue Interface.
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.
- A program or function that gets and processes messages. See also call back, consumer, event handler.
- In JMS, an object that is created within a session to receive messages from a destination.
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.
- The definition of a message, screen panel, net format, or printer layout made during customization of MERVA.
- In the X.25 API, the structure used to indicate what type of packet has arrived and to point to the structure that contains the packet information.
Message Control Information
The part of the Open Transaction Manager Access (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.
- A data set on disk storage that contains queues of messages awaiting transmission to particular terminal operators or to the host system.
- 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.
- 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.
- Information that describes the structure of the messages of a particular type, the elements that each message of that type can or must contain, how a message of that type is represented in various network formats, and the validation rules that apply to a message of that type.
- 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 email only, or as both voice mail and email.
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.
- A repository for CICS messages that 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.
- A group 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.
- A group of all the message definitions that are required to satisfy a particular business need (for example, transferring SWIFTNet FIN messages, transferring SWIFTNet Funds messages, or transferring SWIFTNet system messages).
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-driven rule bean
An enterprise bean that allows Java EE applications to process messages asynchronously. The bean invokes the execution unit (XU) when a JMS message arrives and posts the results of the rule engine processing to a JMS destination.
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 element aggregation
A mapping in which all the repeatable elements in one instance are mapped to another instance. It is not possible to map the repeatable elements themselves, only the instances. This aggregation is useful when mapping all possible inputs to one or more outputs, and can be used for copying an array, or for assigning a scalar, such as a summation.
message end event
An end event that also sends a message. See also end event.
message envelope
The information associated with a message aside from attachments and recipients.
message event
An event that arrives from a participant and triggers another event. If the message event is attached to the boundary of the activity, it changes the normal flow into an exception flow upon being triggered.
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 Message Format Service (MFS),the smallest area in a message input or output descriptor with content and structure that is defined by the user.
- In CICS, the file holding the text of all CICS messages.
- A file containing messages sent in bulk through a message bulking service.
- An object that contains message descriptions. The system-recognized identifier for the object type is *MSGF.
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.
- A connecting object that shows the flow of messages between two collaborating participants. A message flow is represented by a dashed line.
- 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 broker, mediation flow, 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
The definition of the internal structure of a message, in terms of the fields and the order of those fields. When a message format is self-defining, the message is interpreted dynamically when it is read.
- An IMS editing facility that allows application programs to deal with simple logical messages instead of device-dependent data, thus simplifying the application development process.
- 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 frequency
The rate at which messages are generated as a build is executed.
message group
A logical group of related messages. The relationship is defined by the application putting the messages, and ensures that the messages will be retrieved in the sequence put if both the producer and consumer honor the grouping.
message handle
A reference to a message. The handle can be used to obtain access to the message properties of the message.
message handling service (MHS)
An application service element that provides a generalized facility for exchanging electronic messages between systems.
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 contains control information such as a unique message ID, 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 identifier
A 7-character code that identifies a predefined message, and is used to get the message description from a message file.
message input descriptor (MID)
The Message Format Service (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 intermediate event
An intermediate event that can be used to either receive or send a message. See also intermediate event.
message line
An area on the display where messages are displayed.
message listener
An object that acts as an asynchronous message consumer.
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 Message Format Service (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
The process by which parallel tasks explicitly exchange program data.
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
A structured set of areas that define information needed for processing each message in IMS. Some parts of the message prefix always exist, while others are included only 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.
- See message flow node.
- A node in a message flow that represents a processing step. A message processing node can be either a primitive or a subflow node.
message processing program (MPP)
- An IMS application program that is driven by transactions and has access to online IMS databases and message queues. See also batch processing program.
- A program that processes or otherwise responds to messages received from terminals.
message processing unit (MPU)
A message processing unit is used to correlate information within a message, for example reason or completion information, and a message text.
message producer
In JMS, an object that is created by a session and that is used to send messages to a destination. See also producer.
message property
Data associated with a message, in name-value pair format. Message properties can be used as message selectors to filter publications or to selectively get messages from queues. Message properties can be used to include business data or state information about processing without having to alter the message body.
message protection
A recovery and restart function provided by CICS. It logs input and output messages for SNA LUs and enables the messages to be recovered following a system failure.
message protection policy
A set of conditions that define whether a message can be sent or received between web services. See also policy.
message protocol data unit (MPDU)
In OSI, the elements in Protocol 1 (P1) that are used between message transfer agents (MTAs).
- A set of messages that are waiting to be processed by a program or to be sent to a terminal, display, or workstation.
- 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.
- 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.
- A named destination to which messages can be sent until they are retrieved by programs that service the queue.
message queue ID (msqid)
An identifier assigned to a message queue for use within a particular process. It is similar in use to a file descriptor of a file.
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, Java Message Service, message channel agent, message channel interface.
message queue management (MQM)
In WebSphere MQ for HP NonStop Server, 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 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.
- One of a number of segments of a message that is too large either for the application or for the queue manager to handle.
- The unit of access when referring to a message to or from a terminal.
message selector
In application programming, a variable-length string that is used by an application to register its interest in only those messages whose properties satisfy the Structured Query Language (SQL) query that the selection string represents. The syntax of a message selector is based on a subset of the SQL92 conditional expression syntax.
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). It provides a business context for a set of messages.
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 standard
A standard that describes a family of message definitions.
message start event
A start event that is triggered when a specific message is received. See also start event.
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 style
In Tivoli Distributed Monitoring, the amount and format of information presented by certain monitors.
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 token
A unique identifier of a message within an active queue manager.
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.
- The logical structure of the data within a message. For example, the number and location of character strings.
- 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.
- A defined set of values identifying the contents of a message.
- 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.
message unit (MU)
In SNA, the unit of data processed by any layer; for example, a basic information unit (BIU), a path information unit (PIU), or a request/response unit (RU).
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 API
A programming interface that enables an application to send and receive messages and attached files over a messaging system.
messaging engine
The messaging and connection point to which applications connect to the bus.
messaging middleware
Software that provides an interface between applications, allowing them to send data back and forth to each other asynchronously. Data sent by one program can be stored and then forwarded to the receiving program when it becomes available to process it.
messaging system
Software used to deliver electronic messages.
- In UNIX, a character that has special meaning to the shell.
- ASCII character with special meaning during pattern processing. Such characters are used to represent single-byte or multibyte character patterns that can be matched during processing.
- In AIXwindows and Enhanced X-Windows, an object class that does not instantiate widgets or gadgets but is capable of passing a unique set of inheritable resources to the subclasses beneath it in the class hierarchy.
- 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 collection
A metadata component that groups together all the metadata star models to be included in a metadata export. A metadata collection can contain an entire data warehouse model, or a subset of a model, such as a single subject area.
metadata controller (MDC)
A central metadata management facility for data stored on shared disks.
metadata dimension
A metadata component that contains the description of a conformed dimension to include in a metadata export.
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 Explorer
A design tool that presents a hierarchy of classes and properties and lets the user view the entire architecture of Content Engine.
metadata export
A utility that allows the user to export descriptions of the target conformed model in a data mart or data warehouse to an XML file. This file can then be used to produce a model of the target data mart or data warehouse in Framework Manager, without the need to recreate the complete model.
metadata model
A set of related dimensions, query subjects, and other objects that represent data for reporting applications.
metadata repository
A shared component that stores design-time, runtime, glossary, and other metadata for product modules in the InfoSphere Information Server suite. The metadata repository is installed in the metadata repository tier. See also bridge, operations database.
metadata repository tier
The metadata repository and, if installed, the InfoSphere Information Analyzer database (analysis database) and the computer or computers where these components are installed.
metadata schema
A set of database tables that holds information about the dimensions of a model. In particular, it holds the members of each dimension, and information about how the members relate to each other. See also optimal snowflake schema, optimal star schema, parent-child schema, snowflake schema, star schema.
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 star
A catalog object containing the description of the fact table to include in a metadata export, with reference to the metadata dimensions that have been set up.
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).
metadirectory
A directory that provides for the flow of data between one or more directory services and databases in order to maintain synchronization of that data. The data being synchronized are collections of entries containing user profiles, authentication or policy information.
- An XML file that contains document-related metadata, such as a service class association and retention period. A metafile is automatically created for each archived document.
- 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. An example is 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.
- A standard for the definition of information models and the subsequent mapping of these models to CORBA interfaces.
- 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.
- 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.
- 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.
- A record that is used to record measurements.
- A device that measures the consumption of electricity, gas, or water, and charges standard rates according to use.
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.
meter sampling group
Meter assets that are grouped by similar attributes, such as vendor, meter type, and age. Meter assets are sampled according to a meter sampling template.
meter sampling template
A template that defines the percentage or sample size of meters that must be tested.
meter sampling work order
A work order that identifies the meter assets that are to be tested. The work orders trigger the work to replace the meter and the return of the meter to the meter test shop so that it can be properly tested.
- In Java programming, a function that is defined in a class. (Sun)
- A way to implement a function on a class.
- In object-oriented design or programming, the software that implements the behavior specified by an operation.
- In object-oriented programming, an operation that an object can perform. An object can have many methods. See also operation.
- 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 external method, routine, SQL method, structured type.
- In Enhanced X-Windows, the functions or procedures that a widget itself implements.
- See member function.
- In ODM, executable code associated with an object and defined as the value of a method descriptor for the object. The method can be a command, program, or shell script.
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 body
The implementation of the logic of a method. See also routine body.
method descriptor
In ODM, a named variable of type method used to define a method or operation to associate with an object. The method can be any executable code such as a command, program, or shell script.
method extension
An IBM extension to the standard deployment descriptors for enterprise beans that define transaction isolation methods and control the delegation of credentials.
- A file that allows users to indicate to the localedef utility where to look for user-provided methods for processing user-designed codepages.
- 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.
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.
MethodWeb
The primary mechanism for browsing and distributing the IBM Unified Method Framework.
- A holder for information, typically a business performance measurement, in a monitoring context. See also aggregate metric, instance metric.
- In Internet communications, a value that is associated with a route, which is used to discriminate between multiple exit or entry points to the same autonomous system. The route with the lowest metric is preferred.
- An equation that is defined in order to develop a measurement that can be applied against data rules, rule sets, and other metrics.
- 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.
- A measure to assess performance in a key area of a business.
metric extract
A set of mappings between an existing Cognos data source and a Metric Studio object or value. For example, a cube measure named Revenue is mapped to a Metric Studio metric named Revenue Actual Value.
metric package
In Cognos Connection, a representation of a Metric Studio application. A metric package contains connection information, reports, and metric management tasks for that application. See also package.
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.
metrics aggregation
A process that is used by the Transaction Collector to summarize tracking data by using vertical linking and stitching to associate items for a particular transaction instance. Metrics aggregation ensures that all appropriate tracking data is aggregated.
metric store
A database that contains content for metric packages. A metric store also contains Metric Studio settings, such as user preferences.
metric type
A category of metrics that defines the business rules such as performance pattern, units, and meaning of a group of metrics. For example, Revenue can be a metric type, and European Revenue and North American Revenue would be metrics of this type.
Metro Global Mirror
A three-site, high availability, disaster recovery solution. Metro Global Mirror uses synchronous replication to mirror data between a local site and an intermediate site, and asynchronous replication to mirror data from an intermediate site to a remote site.
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 capacity licensing, Global Copy, Global Mirror.
metronome
An application that takes a snapshot of the Tivoli Workload Scheduler configuration and generates an HTML report. It is used in problem determination to provide information to IBM Software Support.
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 local area network, wide area network.
MFIOP
See multifunction IOP.
MFLD
See message field.
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.
MGM
See Memory Grant Manager.
MHz
See megahertz.
MI
See machine interface.
MIB
See Management Information Base.
MIB application program
A systems management application program used to monitor network devices.
MIB module
In the Simple Network Management Protocol (SNMP), a collection of objects relating to a common management area. See also Management Information Base variable.
MIB object
See Management Information Base variable.
MIB tree
In the Simple Network Management Protocol (SNMP), the structure of the Management Information Base (MIB).
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.
MIC
See middle-in-chain.
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.
- The I/O channel used on the POWERstation and POWERserver system units.
- To design, write, and test one or more microinstructions.
- A code, representing the instructions of an instruction set, that is implemented in a part of storage that is not program-addressable.
- 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.
microflow
A short-running process that runs in one transaction. A microflow, which is an IBM extension to the BPEL programming language, runs automatically from start to finish and cannot be interrupted.
micropartition
A logical partition that uses a partial processor. With micropartitioning, a partition can be as small as 1/10th of a processor or can consist of full plus partial processors.
micropattern
A pattern that creates a reusable subprocess from a main process. See also pattern.
microsecond
A measurement of time: one millionth of a second.
Microsoft Cluster Server (MSCS)
A technology that provides high availability by grouping computers running Windows 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 Management Console (MMC)
A general-purpose management display framework for hosting snap-in administration tools including Enterprise Manager.
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.
microswitch
A switch operated by the movement of some part of the machine.
MID
See message input descriptor.
MIDAW
See Modified Indirect Data Address Word.
middle-in-chain (MIC)
A request unit (RU) whose request header (RH) begin chain indicator and RH end chain indicator are both off. See also RU chain.
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 agent
An agent that enables the administrative domain to manage servers that run middleware software.
middleware bundle
An OSGi bundle that contains classes to implement system functions. For example, IBM supplies OSGi bundles for connecting to WebSphere MQ.
middleware descriptor
An XML file that contains information about different middleware platform types, including discovery sensor intervals and installation information.
middleware installer
The installer that is used for installation and configuration of middleware, including database server, application server, and directory server applications.
middleware node
A node that is federated to the deployment manager. These nodes must include nodes that run the node agent or middleware agent.
MIDI
See Musical Instrument Digital Interface.
Mid-Level Manager (MLM)
A Systems Monitor function that performs a subset of systems and network management tasks (for example, polling, status monitoring, and node discovering) for a defined set of Simple Network Management Protocol (SNMP) devices in the network, thereby offloading these tasks from the top-level manager.
MIF
See multiple image facility.
MIF format
See MapInfo Interchange File format.
- To install a new version or release of a program to replace an earlier version or release.
- To move data from one location to another. See also migration level 1, migration level 2.
migrated file
A file that has been copied from a local file system to storage. For HSM clients on UNIX or Linux systems, the file is replaced with a stub file on the local file system. On Windows systems, creation of the stub file is optional. See also file state, premigrated file, stub file.
migrate-on-close recall mode
A mode that causes a migrated file to be recalled back to its originating file system temporarily. See also normal recall mode, read-without-recall recall mode.
- The process of moving report files, resources, and index data from cache storage to long-term (optical or tape) storage.
- See data migration.
- Installation of a new version or release of a program to replace an earlier version or release.
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.
- A node that acts as both an APPN end node and a type 5 subarea node. See also interchange node.
migration installation
An installation method for upgrading AIX Version 3.2 or later to the current release while preserving the existing root volume group. This method preserves the /usr, /tmp, /var, and / (root) file systems, as well as the root volume group, logical volumes, and system configuration files. Migration is the default installation method for, and can only be used on, an AIX Version 3.2 or later machine.
migration job
A specification of files to migrate, and actions to perform on the original files after migration. See also job file, threshold migration.
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, migration level 2, primary storage, storage hierarchy.
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, migration level 1, primary storage, storage hierarchy.
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.
migration threshold
High and low capacities for storage pools or file systems, expressed as percentages, at which migration is set to start and stop.
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.
mil
A measurement of thickness: 1/1000 inch.
- A significant event in a project that is used to determine progress toward goals.
- An activity in which the duration is null because the start time and end time are simultaneous.
Military Grid Reference System
A geocoordinate reference system that consists of four elements: a grid zone designator, a 100,000 meter square identifier, an easting and a northing.
milliard
In British, German, and French, 10 to the power of 9. Equivalent to billion in American English.
millions of service units (MSU)
A measure of the amount of processing a computer can perform in one hour.
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.
MIMD
See multiple instruction stream, multiple data stream.
MIME
See Multipurpose Internet Mail Extensions.
MIME domain
The message domain that includes all messages that conform to the MIME standard. See also BLOB domain, DataObject domain, IDoc domain, JMS domain, MRM domain, SOAP domain, XML domain, XMLNS domain, XMLNSC domain.
MIME parser
A program that interprets a message that belongs to the MIME domain, and generates the corresponding tree from the bit stream on input, or the bit stream from the tree on output.
MIME type
An Internet standard for identifying the type of object being transferred across the Internet.
miniboot
The name of the code that runs in segment 1 of the coprocessor.
minidisk
A direct access storage device (DASD) or a logical subdivision of a DASD that has its own virtual device number.
minification
In computer programming languages, the removal of all unnecessary characters, such as white space characters or newline characters from source code, without changing the functionality.
minimally managed node
A node with no Cluster Systems Management or Reliable Scalable Cluster Technology code installed.
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 device number
A number that specifies various types of information about a particular device. For example, a number that distinguishes between several printers of same type.
minor node
In VTAM, a uniquely defined resource within a major node. See also major node.
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.
- A document version that has not been released. The security of a minor version makes the document available only to the authors and reviewers.
- See release.
minutes (mm)
The notation for minutes in a time stamp is frequently mm as in hh:mm:ss.
MIP
See Message Integrity Protocol.
mipmap
An ordered set of arrays representing the same image at progressively lower resolutions.
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.
mirrored volume
A volume with two volume copies.
mirror function
A function such as Tab and Carriage Return that should work in a mirror-image manner, depending on the current orientation in a bidirectional environment.
- 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.
- See remote mirroring.
- The creation of a mirror image of a primitive.
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.
mirror volume
A volume which contains a backup copy of the original volume.
miscellaneous data record (MDR)
A record of a network hardware error recorded by the NCP and sent to the VTAM host that owns the failing component. Then VTAM writes the error on the operating system error data set.
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.
mitigation cost
The financial impact of lessening risk by lowering its chances of occurring or by reducing its effect if it does occur.
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 code page
A CCSID specially defined to refer to a combination of SBCS and DBCS coded character sets (MBCS) that may be used in data streams or files. For example, Japanese files may use a Latin character set (1172) and code page (1027), and in the same string uses a Kanji character set (370) and code page (300), with the CCSID 5035 for convenient reference. 5035 would be the mixed code page. This is not a real code page.
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 contains 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)
- An IBM-architected, device-independent data stream for interchanging documents.
- 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 z/OS Communications Server 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.
MLM
See Mid-Level Manager.
MLP
See multilingual code page.
MLPA
See modified link pack area.
MLRU
See modified least-recently used.
MLTG
See multilink transmission group.
- See memorandum macro.
- See minutes.
MMC
See Microsoft Management Console.
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.
MMIO
See memory mapped I/O.
MMMLTG
See mixed-media multilink transmission group.
M-Motion Video Adapter/A
An IBM adapter for PS/2 system units with Micro Channel architecture that puts an analog signal on a video graphics adapter (VGA) video stream. With this adapter, full-motion video and VGA graphics and text can be displayed on a standard PS/2 color display.
MNCRS
See Mobile Network Computing Reference Specification.
MNCS
See multinational character set.
- 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.
- See accelerator.
- The field of an assembler instruction that contains the acronym or abbreviation for a machine instruction.
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.
mnemonic symbol
A symbol chosen to assist the human memory. For example, the abbreviation X for multiply.
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.
mobile active code (MAC)
A one-time password that is randomly generated, event-based, and delivered through a secure second channel, such as SMS on mobile phones.
mobile application part (MAP)
Optional layer 7 application for SS7 that runs on top of TCAP for use with mobile network applications.
mobile authentication
An authentication factor which allows mobile users to sign-on securely to corporate resources from anywhere on the network.
mobile cloud
An infrastructure in which storage and processing of data for applications is offloaded from a mobile device into the cloud. With mobile cloud computing, applications are not tied to a specific carrier, but accessed through the web.
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 drive
See USB flash drive.
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.
modal
The state in which a secondary window receives keyboard or pointer input that it does not pass on to its associated window.
modal dialog
In AIXwindows, a Dialog widget that interrupts the work session to solicit input from the user.
modal window
A child window, usually a dialog box, which has to be addressed before the user can continue to operate the parent application.
MODB
See major object descriptor block.
- A copy group attribute that specifies whether to back up a file that has not been modified since the last time the file was backed up. See also absolute mode, modified mode.
- 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.
- See mode name.
- A collection of attributes that specifies a file's type and its access permissions.
- 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.
- In data communications, the set of rules and protocols to be used for a session.
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 z/OS Communications Server LOGMODE entry, which can specify (among other things) the class of service required for a group of APPC sessions.
- A physical or business representation of the structure of the data from one or more data sources. A model describes data objects, structure, and grouping, as well as relationships and security. In Cognos BI, a model is created and maintained in Framework Manager. The model or a subset of the model must be published to the Cognos server as a package for users to create and run reports.
- A container that stores the application objects to be represented in the view. In IBM ILOG JViews TGO, this role is carried out by the representation model.
- In Cognos Planning, a group of D-cubes, D-lists, D-links, and other objects stored in a library. A model may reside in one or more libraries, with a maximum of two for Contributor.
- A system, consisting of fact data and metadata, that represents the aspects of a business.
- A representation of a process, system, or subject area, typically 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 model access control list.
model application program definition
In VTAM, an application program definition that contains a wildcard character, and that has characteristics that VTAM application programs can use when opening application control blocks (ACBs), to dynamically create application program definitions.
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 definition
Data that is used as input for analyzing relational data. A model definition forms the basis for the OLAP database and contains dimensions that are created from the tables and relationships of a relational database.
Model Definition Language (MDL)
A proprietary language that can express the Transformer model definition. MDL is compatible with different versions of Transformer. Transformer model files that are formatted for export use the .mdl extension.
modeled fault
A fault message that is returned from a service that has been modeled on the Web Services Description Language (WSDL) port type.
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.
- A subunit of a model.
- 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 coordinates
In GL, the coordinate system in which all drawing primitives do their drawing. The user can select the position and orientation of the modeling space with regard to the world space by means of translations, rotations, scales, or generalized transformations.
modeling time
A time period during the software development process in which design time and analysis time occur. See also design time.
modeling transformation
In GL, a type of transformation that maps modeling coordinates into world coordinates. All drawing primitives specify positions that are presumed to be positions in modeling coordinates. Modeling transformation can be used to move an image.
model number
In Ada language, an exactly representable value of a real type. Operations of a real type are defined in terms of operations on the model numbers of the type. The properties of the model numbers and of their operations are the minimal properties preserved by all implementations of the real type.
- The equivalent in an application data model to the usage of the term element in the W3C recommendation.
- An application object that is in a data model.
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 segment
A part of a Framework Manager project, such as a parameter map, a data source, a namespace, or a folder, that is a shortcut to a second project. Segments are used to simplify model maintenance or to facilitate multi-user modeling.
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. See also view.
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.
modem eliminator
A device that connects a workstation directly to a computer port through a wired connector with a specific pin arrangement. When two devices both function as DTEs (data terminal equipment), the cable that connects them must transmit send and receive signals using a modem eliminator.
mode name
A name for the collection of physical and logical characteristics and attributes of a session.
mode-name entry
An entry in an LU-mode pair that contains information about the mode that is associated with the partner logical unit.
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 person who sets up the meeting and/or leads it. The moderator can lead the meeting as a presenter or they can give a participant the role as presenter or moderator.
modeset
In CICS, a group of APPC sessions. A modeset is linked by its mode name to a mode group (z/OS Communications Server LOGMODE entry) that defines the class of service for the modeset.
mode word
An inode field that describes the type and state of the inode.
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. See also release, variation.
- 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.
- 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)
- Variation in the amplitude and frequency of the write signal.
- Pertains to the number of bytes of storage that can be stored on the recording media. Synonymous with double-density recording.
Modified Indirect Data Address Word (MIDAW)
A facility for indirect addressing on FICON on System z9. The use of the MIDAW facility by applications that use data chaining may result in improved FICON performance by reducing channel, director, and control unit overhead.
modified least-recently used (MLRU)
A list that tracks modified pages in a queue.
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, 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.
modified state
A snapshot state that indicates that the snapshot can never be used for restoring its master volume.
modifier
A word or quantifier that is used to change an instruction, thereby causing the execution of a different instruction. Consequently, the original instruction, successively changed by a modifier, can be used repetitively to carry out a different operation each time it is used.
- In CDE, a key that when pressed and held along with another key or mouse button changes the meaning of the second key or mouse click. Control, Alt, and Shift are examples.
- In Enhanced X-Windows, keys such as Shift, Shift Lock, Control, Alt, Caps Lock, and Meta.
modify
To make a change to the installed package, for example adding and removing features or languages.
modify current plan (MDC)
A dialog function used to dynamically change the contents of the current plan to respond to changes in the operation environment. Examples of special events that would cause alteration of the current plan are a rerun, a deadline change, or the arrival of an unplanned application.
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.
modular water unit (MWU)
A unit that circulates water, chilled by the heat exchanger, and distributes it to the nodes.
- The process by which a characteristic of a carrier is varied in accordance with a characteristic of an information-bearing signal.
- The process by which a message signal is impressed upon a carrier signal so that the carrier is altered to represent the message signal.
- The process of changing the frequency or size of one signal by using the frequency or size of another signal.
modulator-demodulator
See modem.
- 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.
- A software artifact that is used for developing, managing versions, organizing resources, and deploying to the runtime environment.
- A collection of elements describing a set of entities with a common set of attributes.
- An object that represents a logical grouping of various functional areas in the application and provides more immediate access to those functions. Within the application programming interfaces, a module is called a manager. See also console.
- In networking, a pair of queues that perform functions on messages traveling between stream head and driver.
- A structured document that is composed of multiple artifacts. Structure can be created in a module by modifying the order and hierarchy of the artifacts.
- See program unit.
- A program unit that is discrete and identifiable with respect to compiling, combining with other units, and loading.
- A document that is used to store information.
- A packaged functional hardware unit designed for use with other components.
- 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) See also project.
- In programming languages, a language construct that consists of procedures or data declarations and that interact with other such constructs.
- A database object that is a collection of other database objects, including conditions, data types, functions, procedures, and variables. See also module body, module object, package, routine prototype.
- A collection of objects that is stored and shared in a repository. A module corresponds with a project in a workspace.
module body
For a given module, the unpublished module objects and the routine bodies of published module routines. See also module.
module enabler
In Communications Server for OS/2 Warp, the component that loads and configures the port connection managers (PCMs) of the original equipment manufacturer (OEM) by providing the binding between these PCMs and the connection manager.
module initialization procedure
A procedure that is automatically called when any module routine or variable is first referenced in a session.
module map
A listing of a program module showing the length and module offset of each section.
module object
A database object defined in a module. See also condition, module, published module object.
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
Pertaining to a modulus; for example, 9 is equivalent to 4 modulo 5.
modulo check
A calculation performed on values entered into a system by an operator. This calculation is designed to detect most common typing errors.
modulo level
The maximum number of path information units (PIUs) that a device can send before stopping to wait for a response.
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
- A method for verifying data.
- Formulas used to calculate the check digit for a self-check field.
MOEB
See major object environment block.
- See Meta Object Facility.
- See Managed Object Format.
MOM
See monitor mode.
- 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.
- In performance profiling, to collect data about an application from the running agents that are associated with that application.
- In enterprise search, a user who has the authority to observe collection-level processes.
- 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.
- In the NetView Graphic Monitor Facility, to open a view that can receive status changes from the NetView program. Problem determination and correction can be performed directly from the view. See also browse.
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 autonomic manager, managed resource.
monitor configuration server
The application server installation that owns the overall application server configuration for a cell.
Monitor control server
In replication, a database that contains the Monitor control tables, which store information about alert conditions that the Replication Alert Monitor monitors. 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 directory
The directory where the rapid deployment tools detect added or changed parts and produce an application that can run on the application server. See also automatic application installation project, free-form project.
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.
- The regular assessment of an ongoing production system against defined thresholds to check that the system is operating correctly. See also monitoring domain.
- Running a hardware or software tool to measure the performance characteristics of a system.
monitoring agent
See agent.
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 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 the monitoring domain. See also event monitoring point.
monitoring domain
In CICS, the domain responsible for producing performance information about 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. 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.
- A mode in which an application program can directly access the display adapter.
- 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 model CEI configuration owner
The server installation that owns the overall server configuration that contains the monitor model Common Event Infrastructure (CEI) server target.
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
To change alphabetic characters from one case (usually lowercase) to another case (usually uppercase). One should use monocased data only for presentation or parsing, never for replacement of original data. See also folding.
monocase table
A table used to convert lowercase letters to uppercase letters. The actual process of character conversion is called monocasing.
- A special case of static gray in which there are only two color map entries. Some monochrome adapters can display shades of gray in the Gray Scale Adapter.
- Consisting of a single color.
monoplex
A sysplex consisting of one system that uses a sysplex couple data set (CDS).
- Referring to a character set that uses one space in a preset width for each character.
- One space.
monospaced font
A font in which the spacing of the characters does not vary.
monospacing
The spacing of characters according to a single predetermined width. See also proportional spacing.
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.
more-data bit (M-bit)
In X.25 communications, the bit in a data packet that indicates that there is more data to follow in another data packet, when a message is too large for one packet.
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.
morphological segmentation
A segmentation method that parses and indexes documents by considering the linguistic meanings of words.
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.
MoSCoW
A method of prioritizing requirements developed within DSDM. MoSCoW stands for Must, Could, Should, and Won't.
MOSS
See maintenance and operator subsystem.
MOSS-E
See maintenance and operator subsystem extended.
MoST
See mobile solutions terminal.
most critical application occurrences
Unfinished applications in which latest start time is earlier than or equal to the current time.
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 adaptive address space, 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 adaptive address space, mostly global address space.
most significant byte (MSB)
See big endian.
- See OSF/Motif.
- User interface software, from Open Systems Foundation, for use with the X Window System.
Motion JPEG (M-JPEG)
Used for animation.
- To place a data medium in a position to operate.
- To make a file system accessible.
- To make recording media 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 limit
The maximum number of volumes that can be simultaneously accessed from the same device class. The mount limit determines the maximum number of mount points. See also mount point.
- In Linux operating systems and in UNIX operating systems such as the AIX operating system, the directory at which a file system is mounted and under which other file systems can be mounted.
- A directory established in a workstation or a server local directory that is used during the transparent accessing of a remote file.
- 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. See also mount limit.
mount retention period
The maximum number of minutes that the server retains a mounted sequential-access media volume that is not being used before it dismounts the sequential-access media volume.
mount wait period
The maximum number of minutes that the server waits for a sequential-access volume mount request to be satisfied before canceling the request.
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.
mouse pointer
A symbol on the screen (such as an arrow or hand) that follows the movement of the mouse as the user moves it.
mouse threshold
An operating system parameter that determines the amount of horizontal or vertical mouse movements required to move the cursor on the screen.
movement account
An account generated from a base account, or a manually defined account that reflects movement of equity or fixed assets between opening and closing balances.
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.
- The standard developed by the Moving Pictures Experts Group.
- A group that is working to establish a standard for compressing and storing motion video and animation in digital form.
moving set function
A function that performs calculations on a set of the latest rows in a view. The set of rows to include is determined only when a new data stream arrives.
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).
MPL
See mandatory print labeling.
MPMD
See multiple program, multiple data.
MPMT
See multiprocess multithread.
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.
MPU
See message processing unit.
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. See also channel.
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 commands.
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 machine readable material.
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, DataObject domain, IDoc domain, JMS domain, MIME domain, SOAP domain, XML domain, XMLNS domain, XMLNSC 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.
- See management services.
- See management server.
- See message store.
MSA
See multiport serial adapter.
MSB
See most significant byte.
MSC
See Multiple Systems Coupling.
MSC descriptor
Descriptors used by Extended Terminal Option (ETO) to relate LTERMs to statically defined Multiple Systems Coupling (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.
MSFP
See management services focal point.
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.
msqid
See message queue ID.
- See management services unit.
- See millions of service units.
- See message signal unit.
MSU day
The measurement of the capacity of mainframe software based on the number of millions of service units (MSUs) that are activated on a server during a contiguous 24-hour period.
MT
See message type.
MTA
See message transfer agent.
M-table
See in-memory table.
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.
- See mean time to recovery.
- See mean time to repair.
MU
See message 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.
multi-access 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. See also single-byte character.
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.
- 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.
- See group address.
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.
multi-core
Referring to a system that integrates multiple processors into one virtual processor. See also core, dual-core.
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, different keyboard layouts, and so on.
multi-developer support
A concept that allows developers to share information in a catalog. Multi-developer support can be achieved in and across catalogs using source code control, component packages, and backing up and restoring catalogs. See also component package, source code control.
- 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.
- Pertaining to any system for which the dimension is the fundamental basis of data organization.
multidimensional aggregation
The process of reading data across one level of a hierarchy or auto-level hierarchy, and simultaneously summarizing it across a number of dimensions. See also aggregate rule, aggregation, multilevel aggregation, regular aggregate.
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.
multidimensional data source
See dimensional data source.
Multidimensional Expression Language (MDX)
The multidimensional equivalent of Structured Query Language (SQL).
multidirectional replication
In Q replication, a replication configuration that includes peer-to-peer or bidirectional replication.
multidrop
A network configuration in which there are one or more intermediate nodes on the path between a central node and an endpoint node.
multidrop line
See multipoint line.
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.
multi-instance queue manager
A queue manager that is configured to share the use of queue manager data with other queue manager instances. One instance of a running multi-instance queue manager is active, other instances are on standby ready to take over from the active instance. See also single instance queue manager.
multileaving
A variation of binary synchronous communication (BSC) that enables several devices to communicate concurrently over a link without using station addresses.
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 aggregation
The process of reading data across one level of a hierarchy or auto-level hierarchy, and summarizing it to lower levels. See also aggregate rule, aggregation, multidimensional aggregation, regular aggregate.
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
Referring to many languages. A multilingual program strives to handle data in a way that is not dependent on a particular language or writing system. Multilingual documents combine text which is written in different languages. Multilingual may refer to many languages which all use the same script (such as English, French, and German), or to many languages which use distinct scripts (such as German, Hebrew, and Korean). The latter case is also referred to as multiscript. See also multiscript.
multilingual code page (MLP)
A code page supporting more than one language.
multilingual computing
The ability for software to handle multilingual content, including different scripts within the same computing session. See also globalization.
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.
multimodal
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.
multinational enterprise
Enterprise operating in more than one country.
Multi-node Active Clusters for High-availability
See high-availability cluster.
multinode persistent session
An LU-LU session that is retained after the failure of VTAM, the operating system, or the hardware. See also persistent session.
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. Now replaced by the Payments subsystem.
multiphase scan
A scan that consists of two or more phases. See also phase.
multiplatform
Pertaining to a software product that can be installed on one of several platforms. The product includes the code for several different platforms.
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, I/O Priority Queueing, parallel access volume.
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-authority requirement
An authorization condition for the CKGRACF USER and CKGRACF CMD commands that requires one, two, or three authorizations before the command can be processed.
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 some IBM Power Systems 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)
The operations interface to z/OS systems and sysplexes.
- 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.
- A device file in which the maximum number of program devices is greater than one.
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-domain support (MDS)
A technique for transporting management services data between management services function sets over LU-LU and CP-CP sessions. See also multiple-domain support message unit.
multiple-domain support message unit (MDS-MU)
The message unit that contains management services data and flows between management services function sets over the LU-LU and CP-CP sessions used by multiple-domain support. This message unit, as well as the actual management services data that it contains, is in general data stream (GDS) format. See also control point management services unit, multiple-domain support, network management vector transport.
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 gateways
More than one gateway that serves to connect the same two SNA networks for cross-network sessions.
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.
- A semantic variation of generalization in which a type may have more than one supertype. See also single inheritance.
- An object-oriented programming technique implemented in C++ through derivation, in which the derived class inherits members from more than one base class.
multiple instruction stream, multiple data stream (MIMD)
Pertaining to a parallel programming model in which different processors perform different instructions on different sets of data.
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 program, multiple data (MPMD)
Pertaining to a parallel programming model in which different, but related, programs are run on different sets of data.
multiple-selection field
In System i Access, a list from which a user can choose one or more items.
multiple-subsystem scope
A RACF classification model used in conjunction with the DB2 access control module, or RACF external security module, to construct DB2 resource names with the subsystem ID as part of the class name. See also single-subsystem scope.
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.
Multiple Virtual Storage/Operator Communication Control Facility (MVS/OCCF)
A facility that intercepts messages from the MVS supervisor. The NetView program and MVS/OCCF help a network operator control multiple MVS systems from a central site.
- To simultaneously transmit two or more messages on a single channel.
- To simultaneously transmit two or more messages on a single channel.
multiplexed connection
A single network connection between a database server and a client application that handles multiple database connections from the client.
- 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.
- A device capable of interleaving events of two or more activities or capable of distributing events of an interleaved sequence to the respective activities.
multiplexed distribution (MDist)
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.
- 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.
- See multiplexed device.
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.
- 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.
- 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.
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 connection
A connection that is established for data transmission between more than two data stations.
multipoint line
A line or circuit that connects several stations. See also point-to-point line, point-to-point network.
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 node
An implementation of MPTN architecture that supports more than one transport protocol.
multiprotocol transport network
A collection of single-protocol transport networks, each using a different transport protocol.
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 email 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.
multiscript
Referring to multiple languages that differ in script, for example: German, Hebrew, and Korean. See also multilingual.
MULTISET constructor
A type constructor used to create a MULTISET data type.
MULTISET data type
A collection data type created with the MULTISET constructor in which elements are not ordered and duplicates are allowed.
multisite update
Distributed relational database processing in which data is updated in more than one location within a single unit of work. See also unit of work.
multistation access unit (MAU)
In the IBM Token-Ring Network, a wiring concentrator that can connect up to eight lobes to a ring.
- In XCF, an authorized application that uses XCF coupling services.
- An application program that has various functions distributed across MVS systems in a multisystem environment.
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 RRSF node
An RRSF node consisting of multiple z/OS system images that share the same RACF database. One of the systems is designated to be the main system, and it receives the unsolicited RRSF communications sent to the node.
multisystem sysplex
A sysplex in which two or more MVS images can be initialized as part of the sysplex.
multitail connection
Multiple simultaneous connections to the subarea network through one or more boundary nodes using independent LU protocols.
multitailed
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.
multitask node
A navigation node in which multiple page instances can be opened in the work area per session.
multitenancy
The ability to deliver software to multiple client organizations from a single, shared instance of the software.
- Pertaining to a process that has multiple active threads.
- Pertaining to concurrent operation of more than one path of execution within a computer.
multithread application program
A VTAM application program that processes requests for more than one session concurrently.
multithread capable
See multithread.
multithreaded
Pertaining to the description of a program that is designed to have parts of its code run concurrently.
multithreaded application
An application written using threads. See also threadsafe.
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.
multitiered 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). See also application, dependent resource groups, location dependency.
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.
multiuser mode
A mode of operation that enables two or more users to use the services of a processor within a given period of time. The usage is usually serial unless otherwise specified.
multiuse rule
A rule that defines the conditions under which multiple invocations of a product require only a single license. These rules are applicable only to concurrent licenses. The vendor of the product defines multiuse rules.
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.
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.
MUN
See member unique name.
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.
MustGather
A data collection service offered on the ibm.com support portal to help detect problems.
mutator method
A method that an object provides to define the interface to its instance variables. See also accessor method, getter method, setter 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.
- 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.
- An identifier for a mutual exclusion (mutex).
- See semaphore.
- 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.
- A synchronization function that is used to allow multiple jobs or processes to serialize their access to shared data.
- An abstraction that enables two or more threads to cooperate in a mutual exclusion protocol providing safe access to shared resources.
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 extended nucleus
A major element of MVS virtual storage. This area duplicates the MVS nucleus above the 16 MB line. See also MVS 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 nucleus
A major element of MVS 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 16 MB line as the MVS extended nucleus. See also MVS extended nucleus.
MVS/OCCF
See Multiple Virtual Storage/Operator Communication Control Facility.
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.
MVS/TSO
A type of operating system used on a System/370 computer.
MW
See mark weight.
MWE
See multiword expression.
MWI
See message waiting indicator.
MWLC
See midrange workload license charge.
- See modular water unit.
- See multiword unit.
MXRC
See multiple extended remote copy.
MX record
See mail exchange record.