list of letters
This site contains terms and definitions from many IBM software and hardware products as well as general computing terms.
See measuring and test equipment.
- See mandatory access control.
- See mobile active code.
- See message authentication code.
- See Media Access Control.
See Media Access Control address.
Macao S.A.R. of China
See Macao S.A.R. of the PRC.
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.
- 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.
See computer language.
- 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 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.
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.
See long-running process.
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.
See media access control sublayer.
See multiple area data set.
magnetic ink character recognition
The identification of characters through the use of magnetic ink. See also optical character recognition.
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.
- 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.
- 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 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.
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.
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.
- 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 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.
- 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 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.
- 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.
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.
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.
A user-defined time period for running only required automatic maintenance activities. See also automatic maintenance.
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.
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.
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.
- 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.
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.
See metropolitan area network.
- 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.
A component or resource that is enabled for workspaces and allows content to be written to separate workspace database schemas. See also quick publish.
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.
See managed resource.
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.
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 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.
- 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.
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.
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 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.
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.
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.
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.
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.
- 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.
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.
A policy that determines the degree of control the user has over password injection. See also application policy.
- 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.
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).
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.
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.
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.
In OSI, the part of a systems management application that monitors and controls the resources of an agent process. In OSI Communications Subsystem, the managing process can send operator commands to--and receive event reports from--its agent processes.
mandatory 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.
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.
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.
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.
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.
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.
In data communications, a line type that requires operator actions to receive a call over a switched line. See also automatic answer.
In data communications, a line type requiring operator actions to place a call over a switched line. See also automatic calling.
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.
See attended mode IPL.
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.
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.
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.
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.
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.
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.
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.
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 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.
- 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.
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.
- 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.
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.
- 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 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.
- 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.
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.
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.
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.
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.
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.
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.
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.
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.
See multi-access spool configuration.
- 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.
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.
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.
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.
In a multi-MVS configuration, a region that issues commands to dependent regions at takeover time. See also coordinator.
- 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.
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.
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.
- 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.
- 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.
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.
- 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.
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.
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.
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.
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.
- 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.
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.
In RPG primary or secondary multifile processing, fields within a record type that are to be used for checking the order of a single file, or for matching records of one file with those of another file.
matching record indicator (MR indicator)
An indicator used in calculation or output specifications to indicate operations that are to be performed only when records match in primary and secondary files.
match merge rule
See resolution rule.
- 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.
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.
See multistation access unit.
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.
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.
See multibyte character set.
See Managed Bean.
See more-data bit.
See maximum burst size.
See message control block.
See migration control data set.
See machine check handler.
See maintenance change level.
See multiple chip module.
See multiple console support.
See monitoring control table.
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.
See message-driven bean.
See multidimensional clustering table.
See migration data host.
See managed disk.
See multiplexed distribution.
See Model Definition Language.
See master domain manager.
See miscellaneous data record.
See multiple-domain support message unit.
See Mobile Data Synchronization Protocol.
See Mobile Data Synchronization Service.
See modified data tag.
See Multidimensional Expression Language.
- 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.
- 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.
- 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.
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.
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.
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.
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.
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.
- 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.
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.
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.
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.
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.
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.
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
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.
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.
- 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.
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.
- 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.
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.
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.
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.
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.
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.
See USB flash drive.
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.
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.
See Micro-Electric Mechanical System.
- 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.
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.
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.
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.
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.
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.
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.
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 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.
The part of the message that contains the message payload. See also message header.
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.
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.
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.
- 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.
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.
- 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).
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.
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.
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.
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.
- 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 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.
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.
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.
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 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 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.
A program that interprets the bit stream of an incoming message and creates an internal representation of the message in a tree structure, and that regenerates a bit stream for an outgoing message from the internal representation.
Message Passing Interface (MPI)
A library specification for message passing. MPI is a standard application programming interface (API) that can be used with parallel applications and that uses the best features of a number of existing message-passing systems.
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.
- 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.
- 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.
In JMS, an object that is created by a session and that is used to send messages to a destination. See also producer.
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 policy
A set of conditions that define whether a message can be sent or received between web services. See also policy.
- 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 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 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 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.
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.
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 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 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.
A terminal input message directed to another terminal without being processed by a message processing program. See also program-to-program message switch.
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.
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 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.
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.
- 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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
- 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.
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.
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.
- 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.
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 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 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.
The implementation of the logic of a method. See also routine body.
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.
- 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.
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.
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.
- 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.
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.
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.
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.
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.
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.
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.
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.
See multifunction IOP.
See message field.
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.
See mostly global address space.
See machine-generated data structure.
See Memory Grant Manager.
See machine interface.
See Management Information Base.
In the Simple Network Management Protocol (SNMP), a collection of objects relating to a common management area. See also Management Information Base variable.
See Management Information Base variable.
See Management Information Base variable.
- 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.
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.
A pattern that creates a reusable subprocess from a main process. See also pattern.
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 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.
See message input descriptor.
See Modified Indirect Data Address Word.
A request unit (RU) whose request header (RH) begin chain indicator and RH end chain indicator are both off. See also RU chain.
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.
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.
See multiple image facility.
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.
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.
- 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.
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 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.
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.
See missing-interrupt handler.
- 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.
See Multipurpose Internet Mail Extensions.
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.
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.
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.
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.
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.
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.
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.
See Message Integrity Protocol.
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.
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.
- 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.
CICS transaction that recreates a request that is function shipped from one system to another, issues the request on the second system, and passes the acquired data back to the first system.
miscellaneous 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.
missing-interrupt handler (MIH)
An MVS and MVS/XA facility that tracks I/O interrupts. MIH informs the operator and creates a record whenever an expected interrupt fails to occur before a specified elapsed time is exceeded.
mixed-byte character set
A set of characters that contain both single-byte characters and double-byte characters. For example, a file might contain characters from a single-byte coded character set (such as code page 00290) and characters from a double-byte coded character set (such as code page 00300).
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 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.
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.
- 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.
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.
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.
See Motion JPEG.
See migration level 1.
See migration level 2.
See multilevel alias facility.
See machine level control.
See media library device.
See Mid-Level Manager.
See multilingual code page.
See modified link pack area.
See modified least-recently used.
See multilink transmission group.
See Microsoft Management Console.
See memory mapped I/O.
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.
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.
See Mixed Object Document Content Architecture.
See Mixed Object Document Content Architecture-Presentation.
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.
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.
See USB flash drive.
See message output descriptor.
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.
In the GDDM function, a graphics character (symbol), characterized by an unchanging size, constructed from picture elements. See also 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.
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.
- 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.
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.
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.
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.
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.
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.
A time period during the software development process in which design time and analysis time occur. See also design time.
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.
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.
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 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.
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.
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.
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.
- 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.
- 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 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.
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.
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 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.
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.
- 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.
- 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.
For a given module, the unpublished module objects and the routine bodies of published module routines. See also module.
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.
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).
- A method for verifying data.
- Formulas used to calculate the check digit for a self-check field.
See major object environment block.
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.
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 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.
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.
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.
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.
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.
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.
In CICS, the domain responsible for producing performance information about each task. See also monitoring.
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 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.
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.
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.
- 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.
- Referring to a character set that uses one space in a preset width for each character.
- One space.
The spacing of characters according to a single predetermined width. See also proportional spacing.
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.
See magneto-optic recording.
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.
See maintenance and operator subsystem.
See maintenance and operator subsystem extended.
See mobile solutions terminal.
mostly global address space (MGAS)
A flexible virtual address space model, used in systems such as HP-UX, that preserves most of the address space for shared applications. This can enhance performance for processes that share a lot of data. See also 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.
- To place a data medium in a position to operate.
- To make a file system accessible.
- To make recording media accessible.
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.
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.
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.
A transmittal mode in which the record to be processed is copied to or from a user work area. See also locate mode.
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.
- 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.
See mostly private address space.
See multipath channel.
See message protocol data unit.
See Moving Pictures Experts Group.
See Message Passing Interface.
See mandatory print labeling.
See multiple program, multiple data.
See multiprocess multithread.
See multiple port sharing.
See multiprotocol transport networking.
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.
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).
See message processing unit.
See MQ Attachment.
See WebSphere MQ Administration Interface.
See MQSeries queue handler.
See Message Queue Interface.
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.
See SCADA device protocol.
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.
See message queue management.
See MQSeries nucleus server.
See WebSphere MQ script commands.
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.
See materialized query table.
See matching record indicator.
See multileaving remote job entry.
See machine readable material.
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.
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.
See message reference number.
See multiregion operation.
See machine-reported product data.
See Message Reception Registry.
See multiport serial adapter.
See most significant byte.
See Multiple Systems Coupling.
Descriptors used by Extended Terminal Option (ETO) to relate LTERMs to statically defined Multiple Systems Coupling (MSC) links. See also ETO descriptor.
See Microsoft Cluster Server.
See main storage dump.
See main storage database.
See mail server framework.
See management services focal point.
See maintain system history program.
See message sequence number.
See message queue ID.
See message type.
See message transfer agent.
See in-memory table.
See mean time between failures.
See Multitasking Facility.
See manual tape library.
See master terminal operator.
See message transfer part.
See message unit.
See message unit identifier.
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 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.
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.
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.
See escape sequence.
- 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.
See concurrent server.
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.
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.
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.
The process of assessing and evaluating an enterprise on more than one level. See also business dimension.
multidimensional data source
See dimensional data source.
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.
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-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.
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.
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.
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.
The ability for software to handle multilingual content, including different scripts within the same computing session. See also globalization.
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.
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.
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.
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.
A scan that consists of two or more phases. See also phase.
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.
In a data-sharing environment, a coupling facility structure that contains more than one VSO DEDB area. See also single-area structure.
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.
A semantic variation of generalization in which an object may belong directly to more than one class. See also dynamic classification.
- 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.
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.
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.
- 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 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 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.
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 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)
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.
- 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.
- 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.
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.
More than two devices sharing the same transmission line at the same time. See also point-to-point network.
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.
Referring to multiple languages that differ in script, for example: German, Hebrew, and Korean. See also multilingual.
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.
- 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 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.
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.
- Pertaining to a process that has multiple active threads.
- Pertaining to concurrent operation of more than one path of execution within a computer.
An application written using threads. See also threadsafe.
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.
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.
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.
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.
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.
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.
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.
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.
See model view controller.
See multiversion file system.
See Multiple Virtual Storage.
MVS configuration program (MVSCP)
See hardware configuration definition.
See MVS configuration program.
See MVS/Data Facility Product.
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.
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.
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.
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.
See mark weight.
See multiword expression.
See message waiting indicator.
See midrange workload license charge.
See multiple extended remote copy.
See mail exchange record.