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IBM Terminology


A B C D E F G H I J K L M N O P Q R S T U V W X Y Z #


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S
 
 S/390
IBM enterprise servers based on Enterprise Systems Architecture/390 (ESA/390).The S/390 has been superseded by the IBM zSeries.
 S/390 storage
Storage arrays and logical volumes (LVOLs) that are connected to S/390 servers. S/390 storage sometimes also includes zSeries storage. See also zSeries storage.
 SA
(1) See system administrator.
(2) See Security Association.
 SAA
See storage accounting area.
 SAA communications interface
A programming interface that allows program-to-program communication using the SNA APPC protocols.
 SAAJ
See SOAP with attachments API for Java.
 SAA resource recovery interface
A programming interface that provides a consistent application programming interface for applications that make changes to protected system resources.
 SABM
See set asynchronous balanced mode.
 SABME
See set asynchronous balanced mode extended.
 SACL
See State Adaptive Choreography Language.
 SAF
See System Authorization Facility.
 safe condition
Any condition having a severity of 0 or 1. Such conditions are ignored if a condition handler is not handling the situation.
 SAG
See SWIFTAlliance Gateway.
 SAID
See system adapter identification number.
 sale
In WebSphere Commerce Payments, the simultaneous authorization and capture of a transaction.
 sales catalog
A section of the master catalog that contains a flexible structure for customer display purposes. Users can have only one master catalog per store, but can have as many sales catalogs as they want. See also master catalog.
 sales manager
A defined role in WebSphere Commerce that manages order processing, ensuring that orders are properly fulfilled, payment is received, and orders are shipped. The sales manager can search for customer orders, view details, manage order information, and create and edit returns. See also operations manager, order.
 SAM
See sequential access method.
 Sametime discussion
A type of Sametime program. It allows users to share information with coworkers and to keep shared documents in a central location. Users can also chat with others who are using the same discussion.
 Sametime link
See active name.
 Sametime online meeting center
The database template that Sametime users access to reserve online meetings or to attend online meetings.
 SAML
See Security Assertion Markup Language.
 sampled event
An event that happens when a situation becomes true. Situations sample data at regular intervals. When the situation is true, it opens an event, which is closed automatically when the situation returns to false.
 sample line
In RLU, a record that represents data and gives a user's report prototype a more realistic appearance but for which the user does not create data description specifications (DDS).
 sample program
An application program shipped with the CICS system. Assembler sample programs are supplied in source and executable form. High-level language sample programs are supplied in source form only.
 sample statistics program (DFHOSTAT)
Batch program supplied with CICS which provides information that is useful in calculating the storage requirements of a CICS Transaction Server system, for example, the sizes of the dynamic storage areas.
 sample store
See starter store.
 SAN
(1) See system area network.
(2) See storage area network.
 SAN-attached
Describing disks that are physically attached to all nodes in the cluster using Serial Storage Architecture (SSA) connections or using fibre channel switches.
 sandbox
A restricted environment, provided by the Web browser, in which Java applets run.
 SANergy
See Tivoli SANergy.
 SAN File System console
A Web user interface used to remotely monitor and control the SAN File System with any standard Web browser. See also administrative server.
 sanity check
See smoke test.
 SAP
(1) See service access point.
(2) See Service Advertising Protocol.
(3) See system assist processor.
 SAP selector
An external identifier for a service access point.
 SAR
(1) See significant architectural requirement.
(2) See store archive.
 SAR file format
In WebSphere Commerce, SAR (store archive) is a platform-independent file format that aggregates many files into one. See also store archive.
 SAS
(1) See spool access support.
(2) See Secure Association Service.
 SASL
See Simple Authentication and Security Layer.
 satellite
A DB2 database server that is a member of a group of similar DB2 database servers. Each satellite in the group runs the same application and has a similar configuration to support the application. See also DB2 control server.
 Satellite Administration Center
A user interface that provides centralized administrative support for satellites.
 satellite control server
A DB2 database system that contains the satellite control database, SATCTLDB.
 saturation
(1) The amounts of color and gray in a hue that affect its vividness; that is, a hue with high saturation contains more color and less gray than a hue with low saturation.
(2) The level at which a system no longer operates at its full capacity. See also consumption.
 save
(1) To copy specific objects, libraries, or data by transferring them from main storage or auxiliary storage to media such as optical disc, tape, diskette, or a save file. See also restore.
(2) To make a local copy of a file that is attached to a document.
 save area
An area of main storage in which the contents of registers are saved.
 save conflict
A save conflict occurs when two or more Notes users edit the same document in a Notes database on a server at the same time. The document saved first becomes the main document; subsequent users are prompted to save their changes as responses titled '[Replication or Save Conflict].'
 save file
(1) A file allocated in auxiliary storage that can be used to store saved data on disk (without requiring diskettes or tapes), to do I/O operations from a high-level language program, or to receive objects sent through the network. The system-recognized identifier for the object type is *FILE.
(2) In Backup, Recovery, and Media Services, an online file allocated on direct access storage for use as interim or short-term storage before off-loading to removable media or permanently deleting.
 savepoint
A named entity that represents the state of data and schemas at a particular point in time within a unit of work.
 savepoint level
A distinct scope that is used for reference and for interaction between savepoint-related statements.
 save/restore media
The diskette or the tape that the user uses to save and restore the files, folders, or libraries.
 save storage
An operation that copies (sector by sector) all permanent data from configured disk units to tape.
 save system authority
A special authority that allows the user to save and restore all objects on the system and free storage of all objects on the system.
 save-while-active operation
An operation that the user runs to save objects while application programs that change the objects are running. See also dedicated save operation.
 SAVSYS tape
A tape that is generated by the SAVSYS command, on which system data is recorded and saved.
 SAX
See Simple API for XML.
 SB
See sequential buffering.
 SBA
See set buffer address.
 SBCON
See Single-Byte Command Code Sets Connection.
 SBCS
See single-byte character set.
 SBCS data
Data that is associated with a single-byte character set.
 SC
See session control.
 SCA
(1) See shared communications area.
(2) See system control area.
(3) See Service Component Architecture.
 SCA component
A building block of the Service Component Architecture, used to build SCA modules such as mediation modules.
 SCADA
See supervisory control and data acquisition.
 SCADA device protocol (MQIsdp)
A protocol that implements the WebSphere MQ Telemetry Transport to connect SCADA devices to the broker.
 SCA export binding
A concrete definition that specifies the physical mechanism used by a service requester to access an SCA module; for example, using SOAP/HTTP.
 SCA export interface
An abstract definition that describes how service requesters access an SCA module.
 SCA import binding
A concrete definition that specifies the physical mechanism used by an SCA module to access an external service; for example, using SOAP/HTTP.
 SCA import interface
An abstract definition that describes how an SCA module accesses a service.
 scalability
The ability of a system to expand as resources, such as processors, memory, or storage, are added.
 scalable
(1) Pertaining to a system's ability to increase its capacity to distribute information or data as demand heightens.
(2) Pertaining to the capability of a system to adapt readily to a greater or lesser intensity of use, volume, or demand. For example, a scalable system can efficiently adapt to work with larger or smaller networks performing tasks of varying complexity.
 scalable distribution infrastructure
An infrastructure that enables the management of large numbers of target computers in a variety of topologies. It provides a fast and reliable way to scan, distribute, and install software on target computers or groups of computers.
 scalable node
A physical platform that has at least one SMP Expansion Module. Additional attributes are assigned to a physical platform when it is a scalable node. These additional attributes record the number of SMP Expansion Modules, SMP Expansion Ports, and RXE Expansion ports on the physical chassis.
 scalable object
An IBM Director managed object that is used with Scalable Systems Manager. Scalable objects include scalable nodes, scalable systems, scalable partitions, and remote I/O enclosures that are attached to scalable nodes.
 Scalable Parallel 2 (SP2)
IBM's parallel UNIX system: effectively parallel AIX systems on a high-speed network.
 scalable partition
An IBM Director managed object that defines the scalable nodes that can run a single image of the operating system. A scalable partition has a single, continuous memory space and access to all associated adapters. A scalable partition is the logical equivalent of a physical platform. Scalable partitions are associated with scalable systems and comprise only the scalable nodes from their associated scalable systems.
 scalable system
An IBM Director managed object that consists of scalable nodes and the scalable partitions that are composed of the scalable nodes in the scalable system. When a scalable system contains two or more scalable nodes, the servers that they represent must be interconnected through their SMP Expansion Modules to make a multinode configuration, for example, a 16-way xSeries 455 server made from four scalable nodes.
 Scalable Vector Graphics (SVG)
A vector graphics language written in XML.
 scalar
(1) Pertaining to a single data item.
(2) A type of program object that contains either string or numeric data. It provides the byte string it is mapped to with representation and operational characteristics. See also pointer.
(3) An arithmetic object, an enumerated object, or a pointer to an object.
(4) A quantity characterized by a single value. See also array, vector.
 scalar fullselect
A fullselect that returns a single value: one row of data that consists of exactly one column. See also fullselect.
 scalar function
An SQL function that optionally accepts arguments and that returns a single scalar value each time that it is invoked. A scalar function can be referenced in an SQL statement wherever an expression is valid. See also function, routine.
 scalar instruction
An instruction, such as a load, store, arithmetic, or logical instruction, that operates on a scalar. See also vector instruction.
 scale
(1) The number of digits in the fractional part of a number.
(2) In the GDDM function, the number and progression of ticks along a vertical or horizontal axis.
(3) In the GDDM function, to enlarge an image or marker.
 scale factor
A number that indicates the position of the decimal point in a real number.
 scale line
In Query, a line at the top of a report that shows column positions.
 scaling
A process by which an image is reduced or enlarged in size to fit a given area on the display.
 SCA module
A module that conforms to the Service Component Architecture (SCA) with well-defined interfaces. The module makes its function available to requesters by exporting its interface through an export. The module acts as a requester to a service provider by importing the provider's requirements through an import. It is possible to specify an export from another module as a target in an import. The modules are then packaged in a standard WebSphere Enterprise Archive (EAR) file. An EAR file contains all the files required to deploy the application.
 scan configuration file
A configuration that contains information for scanning commands.
 scan line
(1) A single row of picture elements that are typically arranged horizontally and are scanned sequentially.
(2) In a laser printer, one horizontal sweep of the laser beam across the photoconductor.
 scanner
(1) A device that examines text, graphics, or bar code patterns and generates electrical signals corresponding to the pattern. It sends the signals to a computing device for processing.
(2) The software used to gather hardware information and software information from systems and devices.
 SCA request
A service request that conforms to the Service Component Architecture (SCA). An SCA module routes the request to a service provider, after having done any additional processing specified by the module.
 SCA run time
The server functions that provide support for the Service Component Architecture.
 scattered read
A method of reading contiguous data pages from disk to discontiguous portions of memory. See also block-based I/O.
 scatter plot
A variety of line chart in which only the marked points, and not their joining lines, are drawn.
 SCB
See string control byte.
 SCbus
See Signal Computing bus.
 SCCP
See signaling connection control part.
 SCCS
See Source Code Control System.
 SCD
See system contents directory.
 SCE
See system control element.
 scenario
(1) A set of actions representing a business process within the context of a collaboration. Scenarios can be used to partition a collaboration's logic. For example, if a collaboration handles one type of business object with various possible verbs, the user might develop Create, Update, and Delete scenarios. See also activity.
(2) A specific sequence of actions that illustrates behaviors. A scenario may be used to illustrate an interaction or the execution of one or more use-case instances. See also interaction, use case.
 scenario tree
The set of scenarios, displayed hierarchically, that includes composite scenarios, subdiagrams, and iterators.
 scene
The graphical representation of information retrieved from a database. A scene can also include other graphic elements, such as static text and images, and navigational tools, such as wormholes. See also wormhole.
 schedule
To request that a task set be started at a particular interval or on occurrence of a specified program interrupt.
 scheduled item
Any of the items in an outline to be covered, in sequence, during a session that is added to the Scheduled Items folder at the top of the outline. Instructors add scheduled items when developing the course outline before a session begins.
 scheduled job
(1) A batch job that becomes eligible to run at a specified date and time.
(2) A batch job that is submitted with a value other than *CURRENT for the schedule date and schedule time parameters.
 scheduled meeting
A Sametime meeting that has been created using the New Meeting form, not by clicking an active name or using Sametime Connect. Scheduled meetings can start at a future date and time, or they can start immediately. See also meeting status.
 scheduled offering
A Learning Management System offering with a start and end date that contains one or more learning events, such as a classroom course.
 schedule performance index (SPI)
An earned value metric that describes the ratio of work performed to work scheduled. A number less than 1 indicates that the project is behind schedule.
 scheduler
(1) A computer program that performs functions such as scheduling, initiation, and termination of jobs.
(2) A multithread, multiprocess background server designed to handle the scheduling and launching of jobs, based on a simple timing scheme. See also broadcast job.
(3) A service that provides time-dependent services.
 scheduler agent
A MERVA Liquidity Manager component that schedules the imported messages and updates the balances of the clearing channels.
 scheduler element
The part of the job control table (JCT) entry that represents one or more dynamic support programs (DSPs) needed for processing of jobs by JES3.
 scheduler message block (SMB)
An IMS control block that represents a transaction.
 scheduler work area (SWA)
An element of the CICS address space. The SWA is made up of subpools 236 and 237 which contain information about the job and the step itself. Almost anything that appears in the job stream for the step creates some kind of control block in this area.
 schedule state
A segment of a business schedule. Examples of schedule states are critical, peak, prime, standard, low impact, off hours, and no service.
 schedule variance (SV)
An earned value metric used to describe the difference between the scheduled completion and the actual completion of an activity.
 scheduling environment
A list of resource names along with their required states. If an MVS image satisfies all of the requirements in the scheduling environment associated with a given unit of work, then that unit of work can be assigned to that MVS image. If any of the requirements are not satisfied, then that unit of work cannot be assigned to that MVS image.
 scheduling intent
An application program attribute that is defined in the PSB, and that specifies how the program should be scheduled if multiple programs are contending for scheduling. See also read access, read-only access, exclusive intent, update intent.
 scheduling order
The order in which MERVA Liquidity Manager schedules payments (first-in first-out, smallest first, largest first, or next best fit).
 scheduling parameter
Information that describes the prioritization characteristics of a thread.
 scheduling policy
Information that describes the algorithm that will be used to prioritize threads that are running within the current process or operating system.
 scheduling priority
A transaction attribute that is used in calculating which transaction is selected for scheduling. See also limit priority, normal priority.
 schema
(1) A collection of database objects such as tables, views, indexes, or triggers that define a database. A database schema provides a logical classification of database objects. See also collection.
(2) A group of object classes defined for and applicable to a single namespace.
(3) See XML schema.
(4) See SQL schema.
 schema document definition
A description or layout of an XML document based on an XML schema.
 schema repository
A repository that stores schemas and versions of schemas for user databases.
 SCI
See Structured Call Interface.
 SCM
(1) See software configuration management.
(2) See supply chain management.
 scope
(1) In the C language, the range within a program in which a declaration is known.
(2) The extent to which the semantic effects of language statements reach. The scope may be to the job or to the activation group.
(3) The level to which a commitment control definition applies.
(4) Information that is used to describe whether the scheduling policy indicates that threads compete directly with other threads within the process or within the system.
(5) In Web services, a property that identifies the lifetime of the object serving the invocation request.
(6) A named part of the CICSPlex SM environment that qualifies the context of a CICSPlex SM request. The scope can be the CICSplex itself, a CICS system, a CICS system group, or any set of CICS resources that are defined as a logical scope in a CICSPlex SM resource description. See also context.
(7) A specification of the boundary within which system resources can be used.
(8) The effective range of the enablement of a condition, the establishment of a user-generated routine to handle a condition, or both. Scope can be both statically and dynamically defined. See also namespace scope.
(9) In identity management, the set of entities that a policy or an access control item (ACI) can affect.
(10) The component of a policy expression that describes the class of resources that is subject to the decision of a policy. In the OGSA Policy Service, scope is the policy discipline and policy role.
(11) A part of a source program in which an object is defined and recognized.
 scope management
The process of prioritizing and determining the set of requirements that can be implemented in a particular release cycle, based on the resources and time available. This process continues throughout the lifecycle of the project as changes occur. See also change management.
 scope of control
See network management domain.
 scope operator
In C++, an operator that defines the scope for the argument on the right: if the left argument is blank, the scope is global; if the left argument is a class name or namespace name, then the scope is within that class or namespace respectively.
 scope terminator
A variable at the end of a statement.
 scoping
A mechanism for controlling multiple sign-ons of the same userid to one or more CICS regions.
 score
In DB2 Text Search and DB2 Net Search Extender, an absolute value of type DOUBLE between 0 and 1 that indicates how well a document meets the search criteria relative to the other found documents. The value indicates the number of matches found in the document in relation to the document's size.
 SCORM
See Sharable Content Object Reference Model.
 SCOS
See single copy object store.
 SCP
(1) See service control point.
(2) See System Control Process.
 SCP dependent LU
See SSCP dependent logical unit.
 SCPF job
See start-control-program-function job.
 scrapbook
An editor that can be used to experiment and evaluate Java expressions. Workbench users can run, inspect, and display snippets of code in the scrapbook.
 scratch
The state of a tape volume that is available for general use because it is not assigned. See also use attribute, nonscratch volume.
 scratchpad area (SPA)
A work area used in conversational processing to retain information from an application program across executions of the program.
 scratch pool
The collection of tape cartridges from which requests for scratch tapes can be satisfied.
 scratch processing
The returning of a volume to scratch status once it is no longer in use and has no outstanding release actions pending.
 scratch tape
See scratch volume.
 scratch tape volume
An unassigned tape volume.
 scratch volume
A labeled volume that is either blank or contains no valid data, that is not currently defined, and that is available for use.
 screen
(1) The physical surface of a display device upon which information is shown to a user.
(2) The display that the user sees when he or she connects to a 3270 application on the host system. A single 3270 application can include many screens, each of which has a purpose within the context of the application.
 screen capture
An XML representation of a host screen, used to create or customize a screen customization or transformation.
 screen customization
A HATS resource with two parts: a set of screen recognition criteria used to match host screens, and a list of actions to be taken when a host screen matches the screen recognition criteria.
 Screen Definition Facility (SDF)
An interactive tool used to define and maintain maps, map sets, and partition sets for CICS and BMS applications.
 screen design aid (SDA)
A function of an application development program that helps the user design, create, and maintain displays and menus.
 screen edit mode
In AFP Utilities, the mode that allows a user to design and edit an overlay.
 screen editor
A 3270 terminal service development tool that enables a developer to create and modify recognition profiles for an imported screen and to assign names to the fields on the screen definition.
 screened transfer
A type of call transfer in which the transfer of the held party to the third party is completed only if the third party answers the call. See also blind transfer.
 screen file
The result of importing a screen definition from a 3270 application into the 3270 terminal service development workbench. A screen file represents a screen definition. The screen definition contains identifiers such as the number of fields on the screen and the row and column position of fields on the screen. There are multiple screen files per 3270 terminal service project. Each screen file can have multiple recognition profiles assigned to it.
 screen-image interface
The part of the Front End Programming Interface that has a buffer with one byte for each screen position.
 screen import
The process of importing a screen definition (in its current state) and saving it to a screen file within the 3270 terminal service tools workbench, for the purpose of generating recognition profiles and custom screen records. Use the 3270 terminal service recorder to import screens.
 screen page
The amount of data displayed, or capable of being displayed, at any one time on the screen of a terminal.
 screen reader
A device that renders onscreen text as audible language. See also digital speech synthesizer.
 screen recognition
A runtime function that determines the state of a screen and processes the screen in accordance with the identifiers in the recognition profiles. Screen recognition compares the screen as presented by the 3270 application to the defined recognition profiles to determine which screen state applies.
 screen recognition criteria
A set of criteria used to determine whether a host screen matches a screen customization and should have that screen customization's actions applied. Screen recognition criteria are also used in the process of recording a macro; in this context they are sometimes called descriptors.
 screen sharing
The viewing and controlling of program screens on a computer other than the user's own computer. During a screen-sharing Sametime meeting or Learning Space - Virtual Classroom Live session, one participant shares a screen with the other participants and can allow them to control the program. The program needs to be installed only on the computer of the person who is doing the actual sharing.
 screen state
The set of conditions (at the time the screen was imported from the host) that determine the allowed and required processing on the screen. A screen's state operates on input to change the status, cause an action, or result in a particular output screen. A single screen can have multiple states and the allowed user actions for the screen vary depending on which state the screen is in.
 screen view
In AFP Utilities, the presentation of a display shown while a user is in screen edit mode.
 script
(1) A series of commands, combined in a file, that carry out a particular function when the file is run. Scripts are interpreted as they are run.
(2) The logical flow of actions for a 3270 server program.
(3) An exact text for the telesales service representative to read to a customer regarding transactions. Scripts can be short-hand or prompts to remind a representative to say certain things to a customer at certain points during a call.
 scripted OS image
An unattended install action where operating system installation files that are used with some configuration files would install the operating system on the target system using boot server technology.
 scripting
A style of programming that reuses existing components as a base for building applications.
 scripting language
A high-level programming, or command, language that is interpreted (translated on the fly) rather than compiled ahead of time. See also JavaScript.
 script language
A high-level, application-specific scripting language that consists of statements used to develop 3270 scripts. These scripts are part of the interface between a state table and a 3270-based host business application.
 scriptlet
A mechanism for adding scripting language fragments to a source file.
 scroll
To move a display image vertically or horizontally to view data that is not otherwise visible in a display screen or window.
 scrollability
A property of a cursor that indicates whether the cursor can fetch in a backward direction. See also fetch orientation.
 scrollable cursor
A cursor that can be used to fetch in backward and forward directions. See also nonscrollable cursor.
 scrollable result set
A result set that is associated with a scrollable cursor that allows the application to fetch rows and to refetch previously fetched rows.
 scroll bar
A part of a window that shows a user that more information is available in a particular direction and can be moved into view by using a pointing device or the page keys.
 scrolling window
The portion of the presentation space that is mapped to the viewport at any given time. The window can be moved vertically within the presentation space by scrolling. See also presentation space.
 scrubbing
The removal from VOB and view storage directories of files that are no longer needed.
 SCS
See SNA character string.
 SCSA
See Signal Computing System Architecture.
 SCSI
See Small Computer System Interface.
 SCSI back-end layer
The layer in a Small Computer System Interface (SCSI) network that performs the following functions: controls access to individual disk controller systems that are managed by the cluster; receives requests from the virtualization layer, processes them, and sends them to managed disks; and addresses SCSI-3 commands to the disk controller systems on the storage area network.
 SCSI device
A product, such as a drive or adapter, connected to a host through an I/O interface using the Small Computer System Interface (SCSI) protocol. A SCSI device is either an initiator or a target. See also Small Computer System Interface, initiator.
 SCSI Enclosure Services (SES)
A subset of the small computer system interface (SCSI) protocol used to monitor temperature, power, and fan status for enclosure devices.
 SCSI-FCP
A standard that defines the protocol used to transfer Small Computer System Interface (SCSI) commands over the transport physical layer of the fibre-channel interface. This standard is published by ANSI as X3.269-1996.
 SCSI front-end layer
The layer in a Small Computer System Interface (SCSI) network that receives I/O commands from hosts and provides the SCSI-3 interface to hosts. SCSI logical unit numbers (LUNs) are mapped to virtual disks (VDisks) in this layer as well. Thus, the layer converts SCSI read and write commands that are addressed to LUNs into commands that are addressed to specific VDisks.
 SCSI host system
A host system that is attached with a Small Computer System Interface (SCSI). These host systems run on operating systems such as UNIX, OS/400, Windows NT, Windows 2000, or Novell NetWare.
 SCSI ID
A unique identifier assigned to a Small Computer System Interface (SCSI) device that is used in protocols on the SCSI to identify or select the device. The number of data bits on the SCSI bus determines the number of available SCSI IDs. A wide interface has 16 bits, with 16 possible IDs.
 SDA
(1) See screen design aid.
(2) See statistics data area.
 SDC
See Server Display Control.
 SDDM
See source distributed data manager.
 SDEP
See sequential dependent segment.
 SDF
See Screen Definition Facility.
 SDI
See sequential data set input.
 SDK
See software development kit.
 SDL
See system directory list.
 SDLC
See Synchronous Data Link Control.
 SDO (SDO)
(1) See sequential data set output.
(2) See Service Data Objects.
 SDO repository
A database that the service integration bus for Web services enablement uses for storing and serving Web Services Description Language (WSDL) definitions.
 SDRAM
See synchronous dynamic random access memory.
 SDSA
See shared dynamic storage area.
 SDSB
See spool data set browse.
 SDSF
See System Display and Search Facility.
 SDSL
See symmetric digital subscriber line.
 SDSP
See small-data-set packing.
 SDSRM
See server distributed sync point resource manager.
 SDT
(1) See start data traffic.
(2) See series definition table.
(3) See system dump table.
 SDU
See service data unit.
 SDUMP
See system dump.
 SDWA
See system diagnostic work area.
 SDY
See sequential data set system printer.
 SE
(1) See Support Element.
(2) See IBM systems engineer.
 seal
To encrypt a record containing several fields in such a way that the fields cannot be modified without either knowledge of the encryption key or leaving evidence of tampering.
 search
To request the display of objects that meet user-specified criteria.
 search application
In enterprise search, a program that processes queries, searches the index, returns the search results, and retrieves the source documents.
 search argument
(1) In RPG, a literal or field name specified in factor 1 of certain file operations (such as CHAIN) that identifies the record to be processed.
(2) The conditions specified when searching, consisting of one or several search terms and search parameters.
 search cache
A buffer that holds the data and results of previous search requests.
 search condition
A criterion for selecting rows from a table. A search condition consists of one or more predicates.
 search criteria
(1) Attribute values that are used to retrieve a stored item.
(2) In Information Integrator for Content, specific fields that an administrator defines for a search template that limit or further define choices available to the users.
 search engine
A program that accepts a search request and returns a list of documents to the user.
 search field
In a DL/I call, a field that is referred to by one or more SSAs. See also key field.
 search handle
For System i Access, a number returned by the system to an application program when the application program requests a search. The search handle is used by the application program to request subsequent searches.
 search index
An index of related topics that can be searched or browsed. The system-recognized identifier for the object type is *SCHIDX.
 search index database
The database files used by document library services for storing descriptive information about documents and folders (such as keywords, subjects, dates, and so forth). These database files are used when a search of the document library is requested on one or more document descriptors.
 search index file
A file in which an index is stored in the search engine.
 search path
A list of directories searched by the shell when a command path name is not specified.
 search result
A list of documents that match the search request.
 search template
A form, consisting of search criteria designed by an administrator, for a specific type of federated search. The administrator also identifies the users and user groups who can access each search template.
 search value
User-defined information that is used either to make a list of filed documents with similar document details or content, or to find a directory entry.
 Seascape architecture
A storage system architecture developed by IBM for open-systems servers, and S/390 and zSeries host systems. It provides storage solutions that integrate software, storage management, and technology for disk, tape, and optical storage.
 seat
To fit correctly into position.
 SECMEC
See security mechanism.
 secondary authorization ID
In DB2 for z/OS, an authorization identifier that is associated with a primary authorization ID by an authorization exit routine. See also primary authorization ID.
 secondary axis
In the GDDM function, a horizontal or vertical axis drawn parallel to the primary axis and capable of having a title, ticks, and labels different from those of the primary axis. See also primary axis.
 secondary console
In a system with multiple consoles, any console other than the master console.
 secondary data set group
In a database, the dataset group or groups defined in addition to the primary data set. A secondary data set group is normally defined to improve utilization of auxiliary storage. See also data set group, primary data set group.
 secondary device
One of the devices in a dual-copy or remote-copy logical-volume pair that contains a duplicate of the data on the primary device. Unlike the primary device, the secondary device can accept only a limited subset of channel commands. See also primary device.
 secondary disk pool
An independent disk pool that defines a collection of directories and libraries and must be associated with a primary disk pool.
 secondary domain
The domain that is defined by the DNS domain database file that a secondary name server has obtained from a master name server.
 secondary file
(1) In RPG, any input file other than the primary file.
(2) For certain types of join operations using Query, all files except the first file that are joined in a query definition for the purpose of getting data.
(3) In the DDS for a join logical file, any physical file, other than the first physical file, that is specified on the JFILE keyword. See also primary file.
 secondary GPFS cluster configuration server
In a GPFS cluster, the node chosen to maintain the GPFS cluster configuration data in the event that the primary GPFS cluster configuration server fails or becomes unavailable.
 secondary group buffer pool
For a duplexed group buffer pool, the structure that is used to back up changed pages that are written to the primary group buffer pool. No page registration or cross-invalidation occurs using the secondary group buffer pool. The z/OS equivalent is "new structure." See also primary group buffer pool.
 secondary index
(1) In IMS or VSAM, any index used to provide a path for access to a data set other than that provided by the primary keys. See also alternate index.
(2) A nonpartitioning index on a partitioned table. See also nonpartitioned index.
 secondary index database
An index that is used to establish accessibility to a physical or logical database by a path that is different from the one provided by the database definition. A secondary index contains an index pointer segment type that is defined in a secondary index database.
 secondary language
One or more additional national languages that can be installed on the system to display and print information. See also primary language.
 secondary link
The optical connection between two remote bus adapter cards.
 secondary log
A set of one or more log files used to record changes to a database when the primary log is full. See also primary log.
 secondary logical unit (SLU)
In SNA, the logical unit (LU) that contains the secondary half-session for one logical unit-to-logical unit (LU-to-LU) session. See also primary logical unit.
 secondary logical unit (SLU)
A nonhost port through which the end user gains access to the services of the network. Normally, a nonhost program that resides within a controller or control unit.
 secondary name server
(1) A name server that gets its domain data from a primary name server by way of a zone transfer.
(2) A Domino server that can stand in for a Notes user's home server to ensure that the Notes Name Service is always available over TCP/IP.
 secondary partition
A logical partition that has certain dependencies on the primary logical partition, but otherwise is independent from the primary logical partition. For example, a secondary logical partition may be powered off and on, dumped, or installed without affecting other logical partitions.
 secondary processing sequence
In a database, the hierarchic order of segment types in a physical or logical database that results automatically when a database is accessed through a secondary index.
 secondary referential constraint
The constraint that occurs when a unique constraint or a primary key constraint is added to file that is a parent file in a defined referential constraint relationship. The referential constraint is regarded as secondary processing because the primary request is for the processing of the unique constraint or the primary key constraint.
 secondary request
In a multisystem environment, a message inserted to a transaction code destination by an application program. See also primary request, reply.
 secondary space allocation
The amount of additional space requested by the user for a data set when existing space is full. See also primary space allocation.
 secondary system name
An alternative system name that can be used to identify a system in a SNADS network. See also primary system name.
 secondary system name table
In SNADS, the table containing all the system names that can be used to identify the local system for distributions arriving on the system.
 secondary thread
Any thread that is started by, or on behalf of, the application that is not the initial thread. See also initial thread.
 secondary virtual disk
Pertinent to remote copy, the virtual disk (VDisk) in a relationship that contains a copy of data written by the host application to the primary VDisk. See also relationship.
 secondary vital-record specification
The second retention and movement policy that DFSMSrmm matches to a data set and volume used for disaster recovery and vital records purposes. See also vital record specification, primary vital-record specification.
 secondary window
A window that obtains or displays supplemental information that is often related to the objects that appear in a primary window. Dialog boxes and message boxes are secondary windows.
 second backup object
The second backup copy of an object, which is stored in the object-backup storage group that is specified as a second, object-backup, storage group. See also object backup-storage group.
 second-level destination
The part of a JES2 destination identifier that indicates a remote workstation, special local-route code, or user ID at the target node to which input is to be sent. See also first-level destination.
 section
(1) The segment of a plan or package that contains the executable structures for a single SQL statement. See also SQL and XQuery compiler.
(2) In COBOL, a set of zero, one, or more paragraphs or entries preceded by a section header. Each section consists of a section header and the related section body.
(3) A defined area on a Notes form that can include fields, objects, layout regions, and text. Sections can be set to display (expand) or hide (collapse).
(4) A named collection of program object components, called elements. Each section is assigned a name in binder control statements.
(5) A unit of code or data produced by the compiler. Sections do not have attributes. See also segment.
 sector
(1) In disk storage, an addressable subdivision of a track used to record one block of a program or data.
(2) The smallest amount of information that can be written to or read from a disk or diskette during a single read or write operation.
 secure
To control who can use and to what extent an object can be used by controlling the authority given to the user.
 Secure Association Service (SAS)
An authentication protocol used to communicate securely for the client principal by establishing a secure association between the client and server.
 secure chat
A chat that is encrypted. The default is set for all chats to be encrypted. The default can be changed in Preferences or when initiating a chat with multiple participants. See also secure meeting.
 Secure Electronic Transaction (SET)
An industry standard for secure credit card and debit card payments over open networks such as the Internet. The SET protocol ensures confidentiality of information, integrity of all transmitted data, authentication of the cardholder and the merchant, and interoperability.
 Secure Hash Algorithm (SHA)
An encryption method in which data is encrypted in a way that is mathematically impossible to reverse. Different data can possibly produce the same hash value, but there is no way to use the hash value to determine the original data.
 Secure Hash Algorithm digest (SHA digest)
A character string used to identify a GPFS security key.
 Secure Hypertext Transfer Protocol
A security-enhanced variation of HTTP. S-HTTP allows servers and clients to authenticate each other and to define the kind of security used in transmissions. S-HTTP is an alternative to another well-known security protocol, Secure Sockets Layer (SSL). See also secure server.
 secure interface
For security gateways, the physical layer connection between the gateway and a secure network. See also nonsecure interface.
 Secure Internet Protocol Network
A SWIFT network based on the Internet Protocol (IP) and related technologies.
 secure meeting
An online meeting that is encrypted. During meeting creation, the person scheduling the meeting has the option to secure the meeting by choosing encryption. See also secure chat.
 secure/MIME (S/MIME)
A secure version of the MIME protocol that allows users to send encrypted and electronically signed mail messages, even if users have different mail programs.
 secure network
A set of nodes that are controlled by a single administrative party. See also nonsecure network.
 secure server
A server that encrypts files that it is sending and decrypts files that it has received to facilitate secure communication with a client. See also Secure Hypertext Transfer Protocol.
 Secure Sockets Layer (SSL)
A security protocol that provides communication privacy. With SSL, client/server applications can communicate in a way that is designed to prevent eavesdropping, tampering, and message forgery.
 SecureWay Directory
An LDAP directory that can store user-related data, such as the user ID, the user name, and passwords.
 security
The protection of data, system operations, and devices from accidental or intentional ruin, damage, or exposure.
 security administration
The administration of roles and the assignment of roles in conjunction with organizational units to users. See also system configuration administration, configuration administration.
 security administrator
(1) A programmer who manages, protects, and controls access to sensitive information.
(2) The person who controls access to business data and program functions.
(3) An individual who is responsible for managing security within a database.
 security administrator authority
A special authority that allows a user to add users to the system distribution directory, to create and change user profiles, to add and remove access codes, and to perform office tasks, such as delete documents, folders, and document lists, and change distribution lists for other users.
 Security Assertion Markup Language (SAML)
An XML framework for exchanging authentication and authorization information.
 Security Association (SA)
A contract between a local key server and a remote key server. This contract protects data exchanges.
 security attribute propagation
The transportation of security attributes from one server to another server in a WebSphere Application Server configuration.
 security category
A non-hierarchical grouping of sensitive information used to control access to data.
 security classification
(1) In RACF, the use of security categories, a security level, or both, to impose access controls. See also security level.
(2) An installation-defined level of security printed on the separator pages of printed output.
 security compliance check
A type of compliance check that is used to check for a variety of security issues. See also software compliance check.
 security constraint
A declaration of how to protect Web content, and how to protect data that is communicated between the client and the server.
 security context
The digitally signed token that identifies a principal, lists the roles and access rights for the principal, and contains information about when the token expires.
 security definition
In z/OS, a member containing the definitions for one identification label. These definitions include instructions for the overlay name, and the size and origin of paper to be used.
 security definitions library
In z/OS, a partitioned data set or a series of concatenated partitioned data sets that contain the security definitions for an entire system.
 security domain
The set of all the servers that are configured with the same user registry realm name.
 security DST capability
A dedicated service tools (DST) capability used by a service representative or an experienced system user that provides access to all DST functions.
 security enabling interface (SEI)
The WebSphere MQ interface to which customer- or vendor-written programs that check authorization, supply a user identifier, or perform authentication must conform. A part of theWebSphere MQ Framework.
 security entity
Entities used to specify what a user is authorized to do. Security entities include roles and users.
 security exit
A channel exit program that is called immediately after the initial data negotiation has completed on channel startup. Security exits normally work in pairs and can be called on both message channels and MQI channels. The primary purpose of the security exit is to enable the message channel agent (MCA) at each end of a channel to authenticate its partner.
 security group
In a Tivoli environment, a group of managed resources over which a Tivoli administrator is granted authority. Examples of a security group include a policy region and the administrator collection.
 security id
See security identifier.
 security identifier (security id)
On Windows systems, a supplement to the user ID that identifies the full user account details on the Windows security account manager database where the user is defined.
 security label
(1) In RACF, an installation-defined name that corresponds to a specific RACF security level with a set of security categories.
(2) In a trusted computing base, a label used to maintain multiple levels of security on a system. This label is a combination of a security class and a security level. See also identification label.
(3) In label-based access control (LBAC), a database object that can be granted to users and can also be applied to columns and rows in a table to protect the data. Only users who are granted appropriate security labels can access data that is protected by a security label. See also label-based access control, security label component, security policy.
(4) A classification of users' access to objects or data rows in a multilevel security environment.
 security label component
In label-based access control, a database object that represents one of the criteria that an organization uses to decide who has access to specific data. See also security label, element.
 security level
In RACF, an installation-defined name that is associated with a number in the range 1 through 254. The security level increases as the numbers become higher. See also security classification.
 security log
A log that maintains a history of administrator login activity generated by the administrative server.
 security manager domain
A CICS domain that handles all the interfaces to the external security manager, for example, RACF.
 security mechanism (SECMEC)
A technical tool or technique that is used to implement a security service. A mechanism might operate by itself, or in conjunction with others, to provide a particular service. Examples of security mechanisms include access control lists, cryptography, and digital signatures.
 security message
One of the messages, sent by security exits that are called at both ends of a channel, to communicate with each other. The format of a security message is not defined and is determined by the user.
 security officer
A person assigned to control all of the security authorizations provided with the system. A security officer can, for example, remove password or resource security or add, change, or remove security information about any system user.
 security overlay
An overlay, such as one created by use of Overlay Generation Language, that resides in a secure library and is used to place security resources on a page.
 security permission
Authorization granted to access a system resource.
 security policy
(1) A written document that defines the security controls that you institute for your computer systems. A security policy describes the risks that you intend these controls to minimize and the actions that should be taken if someone breaches your security controls.
(2) In label-based access control, a database object that is associated with one or more tables and that defines how LBAC can be used to protect those tables. The security policy defines what security labels can be used, how the security labels are compared to each other, and whether optional behaviors are used. See also label-based access control, security label.
 Security Policy Index (SPI)
A value that the local systems and remote systems use to identify a particular Security Association (SA).
 security profile
A role-based security model that supports classes of service, which have different levels of access to system and repository information.
 security registry
The database of user IDs, passwords, and user descriptions for a local workstation.
 security-relevant
Pertaining to anything that occurs on the system that affects, either positively or negatively, the safety and integrity of the system's processes and data.
 security role
In Java EE, an abstract logical grouping of users that is defined by the application assembler. When an application is deployed, the roles are mapped to security identities, such as principals or groups, in the operational environment. (Sun)
 security role reference
A role that defines the access levels that users have and the specific resources that they can modify at those levels.
 security service
A service within a computer system that protect its resources. Access control is an example of a security service.
 Security Support Provider Interface (SSI)
The means for networked applications to call one of several security support providers (SSPs) to establish authenticated connections and to exchange data securely over those connections. It is available for use on Windows systems.
 security token
(1) In RACF, a collection of security information that represents data to be accessed, a user, or a job. A security token contains a user ID, a group ID, a security label, the node of origin, and other information.
(2) A representation of a set of claims that are made by a client that can include a name, password, identity, key, certificate, group, privilege, and so on.
 see also entry
A cross-reference from one index entry to additional information. See also see entry.
 seed
A value that adds randomness to the creation of pseudorandom numbers.
 seed file
A file, containing a list of nodes within an administrative domain, that helps create the network topology map.
 seed list page
In WebSphere Portal, an XML page that contains links to the pages that are available on a portal. Crawlers use the seed list to identify the documents to crawl. The seed list page also contains metadata that is stored with the crawled documents in the enterprise search index.
 see entry
A cross-reference to a preferred term from obsolete terms, selected synonyms, or terms used by competitive products. See also see also entry.
 seek
To position the read/write head of a disk unit or a diskette unit.
 segment
(1) One or more contiguous elements of a string.
(2) For TCP/IP, the unit of end-to-end transmission in the TCP. A segment consists of control information and data fields. A segment is transmitted as an IP datagram.
(3) A part of a program that can be run without the entire program being in main storage.
(4) In IMS, the unit of access to a database; for the database system, the smallest amount of data that can be transferred by one IMS operation. For input terminal operations using IMS TM, a segment is defined by the particular terminal type and is obtained by the application program with one call.
(5) A group of pages that holds a row of a single table.
(6) A collection of composed text and images, prepared before formatting and included in a document when it is printed.
(7) In data mining, a group of input data records within a data set that have similar characteristics. Each group is called a segment. Within a segment, each piece of data is evaluated (or scored) for the degree to which it fits the segment to which it belongs. This statistical conformance is represented by a number, called the score, which ranges between 0.0 and 1.0. In DB2 Intelligent Miner, this concept is known as a cluster.
(8) A unit of code or data produced by the linker and existing only in an executable image of the program. The linker assigns attributes to sections, orders and groups them, and puts them into segments. See also section.
 segmentation
(1) The division of text into segments, usually words, sentences and paragraphs.
(2) The division of text into distinct lexical units. Nondictionary-based processing includes white space and n-gram segmentation, while dictionary-based support includes word, sentence, and paragraph segmentation, and lemmatization.
 segmentation violation
An error caused when a program attempts to access memory not allocated to it.
 segment directory
A file containing the format of all EDI segments in an EDI standard.
 segmented table space
A table space that is divided into equal-sized groups of pages called segments. Segments are assigned to tables so that rows of different tables are never stored in the same segment. See also table space, universal table space.
 segment identifier
A unique three-character identifier at the beginning of each EDI segment.
 segment ID number
One or more numbers used to identify a voice or prompt segment.
 segment ID separator
The character that separates the segment identifier from the EDI data elements in the EDI segment. See also data element delimiter.
 segmenting
In OSI, a function performed by an (N)-entity to map one (N)-service-data-unit into multiple (N)-protocol-data-units.(I) Segmenting is the opposite of reassembly.
 segment-number
In COBOL, a user-defined word that classifies sections in the Procedure Division for purposes of segmentation. Segment numbers can contain only the characters 0 through 9. A segment-number can be expressed either as a 1- or 2-digit number.
 segment occurrence
In a database, an instance of a segment type. See also segment type.
 segment search argument (SSA)
The portion of a DL/I call that identifies a segment or group of segments to be processed. Each SSA contains a segment name and, optionally, one or more command codes, and one or more qualification statements. Multiple SSAs may be required to identify the desired segment. See also qualified segment search argument, unqualified segment search argument.
 segment terminator
The character that marks the end of an EDI segment.
 segment type
In a database, a user-defined category of data. See also segment occurrence.
 SEI
See security enabling interface.
 seion
A Japanese syllable.
 select
To highlight a choice so that a subsequent action will use that choice. Selecting does not initiate the action.
 select function
A system function that determines which records from a physical file are to be included in a logical file. See also omit function.
 selection border
The visual border that appears around a control, allowing that control to be moved with the mouse or keyboard.
 selection character
A character used to select a choice in a selection list or a selection field.
 selection data set
In aggregate backup and recovery processing, a sequential data set or a member of a partitioned data set (PDS) used to define the data sets that compose the input. The selection data set contains any include, exclude, accompany, or allocate lists.
 selection entry
In System Manager, an entry that assigns each alert processed by the filter to a group. In this way, many alerts can be grouped into manageable categories.
 selection field
A panel element that contains a fixed number of choices in which the user cannot page up or page down.
 selection list
In SAA Advanced Common User Access architecture, a set of choices that a user can scroll through to make a selection.
 selection priority
See scheduling priority.
 selective backup
The process of backing up selected files or directories from a client domain.
 selective prompting
A function of the operating system that allows the user to tailor command prompts at a parameter level. See also conditional prompting.
 select/omit field
A field in a logical file record format whose value is tested by the system to determine if records including that field are to be used. The test is a comparison with a constant, the contents of another field, a range of values, or a list of values; and the record is either selected or omitted as a result of the test.
 select/omit level specifications
Data description specifications coded on the lines following the last key-field specification. These specifications are permitted only in a logical file.
 selector
An identifier for a data item. In the WebSphere MQ Administration Interface (MQAI), there are two types of selector: a user selector and a system selector.
 selector component
A component that provides a means of interposing a dynamic selection mechanism between the client application and a set of target implementations.
 self-check digit
The far right digit of a self-check field.
 self-check field
A field, such as an account number, consisting of a base number and a self-check digit. For data entry applications, the operator-entered self-check number is compared with the self-check number calculated by the system.
 self-configure
To adapt to dynamically changing environments. See also autonomic computing.
 self-defining element
An element for which no matching definition exists in the message model. See also self-defining message, predefined element.
 self-defining message
An message for which no matching definition exists in the message model. For example, a message coded in XML is self-defining. See also predefined message, self-defining element.
 self-heal
To discover, diagnose, and act to prevent disruptions.
 self-healing
Pertaining to an on-demand operating environment that responds automatically to problems, security threats, and system failures. Also describes the ability, in autonomic computing, to discover, diagnose, and prevent disruptions. See also on demand operating environment.
 self-optimize
To tune resources and balance workloads to maximize the use of IT resources.
 self-protect
To anticipate, detect, identify, and protect against attacks.
 self-referencing constraint
A referential constraint that defines a relationship in which a table is a dependent of itself.
 self-referencing row
A row that is a parent of itself.
 self-referencing table
A table that is both a parent and a dependent table in the same referential constraint.
 self-registration
The process by which a user can enter required data and become a registered user, without the involvement of an administrator.
 self test
A test that runs automatically after a device is turned on.
 self-timed interface (STI)
An interface that has one or more conductors that transmit information serially between two interconnected units without requiring any clock signals to recover the data. The STI performs clock recovery independently on each serial data stream and uses information in the data stream to determine character boundaries and inter-conductor synchronization.
 self-transition relationship
In UML modeling, a relationship that indicates that the active state does not change when an object in the source state receives a specified event, performs a specific action, or meets a certain condition. See also transition relationship.
 seller
(1) A defined role in WebSphere Commerce that has access to all WebSphere Commerce Accelerator capabilities. See also expected inventory, expected inventory record.
(2) The role that supervises the overall store objectives and management, in addition to tracking the store sales. The seller role is equivalent to a merchant.
 seller administrator
The seller administrator manages the information for the selling organization. The seller administrator creates and administers the suborganizations within the selling organization and the various users in the selling organization, including the assignment of appropriate business roles.
 semantic model
In the Reusable Asset Specification (RAS), a model that describes the nature of core elements of an asset. The model elaborates on specific elements of an asset, providing insight to the asset's structure as captured in the asset structure model.
 semantics
The relationships of characters or groups of characters to their meanings, independent of the manner of their interpretation and use. Semantics is the meaning conveyed by a character string. See also syntax.
 semantic search
A type of keyword search that incorporates linguistic and contextual analysis. See also text analysis.
 semantic type
The usage or rules for an item. Base, annotation, and note are semantic types supplied by Content Manager; users can also define their own semantic types. See also item.
 semantic variation point
A point of variation in the semantics of a metamodel. It provides an intentional degree of freedom for the interpretation of the metamodel semantics.
 semaphore
(1) A mechanism that is used to synchronize one or more jobs.
(2) An indicator used to control access to a file. For example, in a multiuser application, a semaphore is a flag that prevents simultaneous access to a file.
(3) In UNIX systems, a general method of communication between two processes that extends the features of signals.
(4) An object used by multi-threaded applications for signaling purposes and for controlling access to serially reusable resources. Processes can be locked to a resource with semaphores if the processes follow certain programming conventions.
 semaphore adjustment value
A value associated with a semaphore and applied to the semaphore's value if a process ends while holding resources represented by the semaphore.
 semaphore set
An interprocess communications mechanism that contains one or more semaphores.
 semi-automatic mode
An operating mode in which all deployment requests are automatically generated, and then manually reviewed and approved by an administrator before being executed.
 semicolon
In REXX, a token that indicates the end of a clause and is implied by the REXX interpreter in three cases: by the end of a line, by certain keywords, and by a colon if it follows a single symbol.
 send and forget
See datagram.
 send depth
In SNADS, the number of items that must be on the distribution queue before any item is sent to the next system.
 sender
The object passing a stimulus to a receiver object. See also receiver, receive.
 sender bean
In extended messaging, an enterprise bean (stateless session bean) that can be built to send asynchronous messages. A sender bean translates its method invocation into a JMS message, then passes that message to JMS. It can also retrieve a response message, translate that message into a result value, and return it to the caller.
 sender channel
In message queuing, a channel that initiates transfers, removes messages from a transmission queue, and moves them over a communication link to a receiver or requester channel.
 send exit
A type of channel exit program that is called just before a message channel agent (MCA) issues a communications send to send a unit of data over a communications connection. See also receive exit.
 sending cross-domain key
In Cryptographic Support, a cross-domain key used to encrypt a data-encrypting key before it is sent to another location.
 send queue
In Q replication, a WebSphere MQ message queue that is used by a Q Capture program to publish transactions that it has captured. A send queue can be used either for Q replication or event publishing, but not both at the same time.
 send time
In SNADS, the values that specify the time that distributions are sent to other locations in a network. The from and to times inclusively specify the range during which distributions can be sent; the force time specifies the time at which distributions are sent regardless of the number of items in the queue.
 senior role
See authorization role.
 sense code
A value sent or received, or a negative response to indicate what error occurred.
 sense data
(1) In SNA, data sent with a negative response, indicating the reason for the response.
(2) In printers, sense information used to indicate the causes of command-stream and device exceptions and to direct the host program to the appropriate exception-recovery actions.
 sense type and model (STM)
Command sent by the operating system to detect the type and model of an attached printer.
 sensitive cursor
A cursor that is sensitive to changes made to a database after the result table has been materialized. See also cursor, cursor sensitivity.
 sensitive segment
A segment type in a database to which an application program is sensitive.
 sensitivity
(1) A level of classification of information as defined by the X.400 Standard. Mail items can be assigned a sensitivity of none, personal, private, or confidential.
(2) An IMS capability that ensures that only data segments or fields predefined as "sensitive" are available for use in a particular application. The sensitivity concept also provides a degree of control over data security, inasmuch as users can be prevented from accessing particular segments or fields by omission of those segments or fields from the logical database. Sensitivity is implemented through the DB PCB.
(3) The amount of time by which a threshold-based health indicator must exceed its threshold or the amount of time that a state-based health indicator must be in a non-normal state before an alert is generated.
 sensor
(1) A device that converts measurable elements of a physical process into data that is meaningful to a computer.
(2) Software that monitors security networks, applications, or systems for security-related information, possibly indicative of suspicious activity.
(3) An interface that exposes information about the state and state transitions of a managed resource. A sensor is used to retrieve data from a managed resource, whereas an effector is used to alter data in a managed resource. See also managed resource, effector, externalized data value, manageability interface, touchpoint.
(4) A program that reads information from a managed software system to create configuration information.
 sensor event
An intrusion detection event that is reported by a sensor or adapter.
 sensor event adapter
Software that intercepts information generated by one or more sensors, filters the data, reformats the data into an appropriate sensor event, and forwards the sensor event.
 sensor value
In a policy-enabled system, a data value that is returned by a sensor and that can be used by a policy. See also sensor.
 sentence
In COBOL, a sequence of one or more statements, the last of which is stopped by a separator period.
 SEPA
See Software Engineering Process Authority.
 separate search space
An implementation of the Product Advisor. For this style of implementation, additional database tables must be created that contain metadata to facilitate searching a particular category of products. See also base search space.
 separator
A punctuation character that separates parts of a command or file, or that delimits character strings.
 separator page
An identifying sheet of paper between successive jobs.
 sequence
(1) To arrange in order.
(2) A database object that is independent of any one table that automatically generates unique key values based on initial user specifications.
(3) A sequentially ordered flat collection.
(4) In the XQuery and XPath data model, an ordered collection of zero or more items. See also XQuery and XPath data model.
(5) In fibre-channel technology, a group of related frames transmitted in the same direction between two node ports (N_ports).
 sequence checking
(1) In RPG, a function that checks the sequence of records in input, update, or combined files used as primary and secondary files.
(2) The process of verifying the order of a set of records relative to some field's collating sequence.
 sequence diagram
A UML structural diagram that shows the chronological sequence of messages between instances (objects or classifier roles) that work together in an interaction or interaction instance. See also collaboration diagram, lifeline.
 Sequenced Packet Exchange protocol (SPX)
A session-oriented network protocol that provides connection-oriented services between two nodes on the network, and is used primarily by client/server applications. It relies on the Internet Packet Exchange (IPX) protocol, provides flow control and error recovery, and guarantees reliability of the physical network.
 sequence errors
In Performance Tools, the number of frames received by the terminal equipment (TE) that contained sequence numbers indicating that frames were lost.
 sequence field
The field in a database segment that used to store segment occurrences in sequential ascending order.
 sequence grouping
The specification of the order in which entity beans update relational database tables.
 sequence number
(1) The number of a record that identifies the record within the source member.
(2) A field in a journal entry that contains a number assigned by the system. This number is initially 1 and is increased until the journal is changed or the sequence number is reset by the user.
(3) A 2-byte field in the structured field introducer that identifies the position of the structured field in the data set.
(4) A number assigned to each message exchanged between two nodes. The number is increased by one for each successive message. It starts from zero each time a new session is established.
 sequence number wrap value
In WebSphere MQ, a method of ensuring that both ends of a communication link reset their current message sequence numbers at the same time. Transmitting messages with a sequence number ensures that the receiving channel can reestablish the message sequence when storing the messages.
 sequence page
A page in the settings of a composite project that allows the user to specify the order in which projects are built.
 sequence set
The lowest level of the index of a key-sequenced data set (KSDS); it gives the locations of the control intervals in the data set and orders them by the key sequence of the data records they contain. The sequence set and the index set together comprise the index. See also index set.
 sequence type
A data type that can be expressed by using the SequenceType syntax, which describes the type of an XQuery value. Sequence types are used to refer to a data type in an XQuery expression.
 sequential access
(1) A mode of accessing data on a medium in a manner that requires the storage device to access consecutive storage locations on the medium.
(2) The retrieval or storage of a VSAM or SAM data record in either its physical order or its collating sequence relative to the previously retrieved or previously stored record.
(3) The process of referring to records one after another in the order in which they appear on the file. See also access mode.
 sequential access method (SAM)
An access method for storing, deleting, or retrieving data in a continuous sequence based on the logical order of the records in the file.
 sequential buffering (SB)
Efficient sequential input buffering techniques that reduce the elapsed time required to sequentially process large IMS OSAM databases.
 sequential-by-key processing
A method of processing indexed files in which records are read or written in the order of the key field in the record.
 sequential concatenation
The allocation of sequential data sets, partitioned data set (PDS) members, partitioned data set extended (PDSE) members, UNIX files, or any combination of these such that the system retrieves them as a single, sequential, data set. See also data set concatenation.
 sequential data set
A data set whose records are organized on the basis of their successive physical positions, such as on magnetic tape. See also partitioned data set, direct data set.
 sequential data set input (SDI)
A batch utility used to import messages from a sequential data set or a tape into MERVA ESA queues.
 sequential data set output (SDO)
A batch utility used to export messages from a MERVA ESA queue to a sequential data set or a tape.
 sequential data set system printer (SDY)
A batch utility used to print messages from a MERVA ESA queue.
 sequential data striping
A software implementation of the striping of a disk array that distributes data sets across multiple volumes to improve performance.
 sequential dependent segment (SDEP)
A segment of a data entry database that is chained off the root segment and inserted (last-in first-out) into the last part of a DEDB area. After being inserted by an online program, the SDEP cannot be modified. See also data entry database.
 sequential file
(1) See sequential data set.
(2) For Network File System (NFS), a type of MVS file that has its records stored and retrieved according to their physical order within the file. It must be on a direct access volume.
 sequential millisecond response
A parameter specified in the definition of a storage management subsystem (SMS) storage class indicating the desired response time to read the next 4-KB block of a data entity assuming the prior 4-KB block has been read.
 sequential organization
In COBOL, the permanent logical file structure in which a record is identified by a predecessor-successor relationship that is established when the record is placed into the file.
 sequential prefetch
A mechanism that triggers consecutive asynchronous I/O operations. Pages are fetched before they are required, and several pages are read by using a single I/O o