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C2
A level of security defined in the Trusted Computer System Evaluation Criteria (TCSEC) published by the United States Government. To meet C2 requirements, a system must perform discretionary access control, authentication and verification, object reuse protection, and auditing of security-relevant events.

C/370
A programming language designed for a wide range of system and commercial applications.

CA
(1) See certificate authority.
(2) See control area.

cable path
A series of cables connected in sequence.

cable-through
Pertaining to a function or feature of a display station that allows multiple work stations to be attached to one cable path.

CA certificate
See certificate authority certificate.

cache
(1) A special-purpose buffer storage, smaller and faster than main storage, used to hold a copy of instructions and data obtained from main storage and likely to be needed next by the processor.
(2) A buffer storage that contains copies of remote documents that are accessed by a portal. Portal Server uses a caching system to improve the performance of remote content feeds and page rendering.
(3) A buffer that contains frequently accessed instructions and data; it is used to reduce access time.
(4) To place, hide, or store frequently used information locally for quick retrieval.

cache coherence protocol
A method for ensuring the cache is up-to-date among distributed shared memory machines. Definition created by terminologist, no official definition found.

cache instance resource
A location where any Java 2 Platform, Enterprise Edition (J2EE) application can store, distribute, and share data.

cache line
A record that contains relevant information about the user data that is currently in the subsystem cache memory. Examples of this information include the current state of the data and the intended location of the data on one or more disks.

cache replication
The sharing of cache IDs, cache entries, and cache invalidations with other servers in the same replication domain.

cache structure
A coupling facility structure that stores data that can be available to all members of a Parallel Sysplex. A DB2 Universal Database for z/OS and OS/390 data sharing group uses cache structures as a group buffer pool. See also group buffer pool.

cache table
In a federated system, a logical table object that is used to cache data from a data source table. A cache table is comprised of a nickname that identifies the data source table, one or more materialized query tables, and a schedule for replicating the data in each materialized query table.

cache timeout
The length of time that is allowed to pass before the cache is updated.

caching
The process of storing frequently used results from a request to memory for quick retrieval, until it is time to refresh the information. DB2 Universal Database provides many forms of caching, such as directory caching, package caching, file system caching, and LDAP caching.

caching proxy server
A proxy server that stores the documents that it retrieves from other servers in a local cache. The caching proxy server can then respond to subsequent requests for these documents without retrieving them from the other servers. This can improve response time.

cadence
The modulated and rhythmic recurrence of an audio signal. For example, a series of beeps or a series of rings.

CAF
See call attachment facility.

CA key
See command attention key.

calculation code
A code associated with order items, catalog entries, or catalog groups to specify how discounts, shipping charges, sales or use taxes, and shipping taxes should be calculated.

calculation rule
A rule that defines how a calculation will be done.

calculation scale
A set of ranges that can be used by a calculation rule. For example, for shipping charges, there can be a set of weight ranges that each correspond to a particular cost. That is, a product that weighs between 0 to 5 kg might cost $10.00 to ship, while a product weighing 5 to 10 kg might cost $15.00 to ship.

calculation specification
In RPG, a specification on which the programmer describes the processing to be done by the program.

calendar
A view in the Notes mail database that can be used to manage time and schedule meetings. You can add appointments, meetings, reminders, events, and anniversaries to the Calendar view. You can also display tasks in the calendar view.

calendaring and scheduling
In Sametime, a feature available for clients using Notes that allows the user whose mail is enabled with Sametime to schedule an online meeting in Notes and send e-mail invitations to prospective participants.

calibration
In capacity planning, the process of refining a model so that it represents the system the user is modeling. The predicted and measured values should match as closely as possible, with no more than a 10% difference for resource utilization, and no more than a 20% difference for response times.

call
(1) To invoke a stored procedure by using the SQL CALL statement.
(2) An instruction in COBOL, assembler language, C/370, or PL/I format that is used by an application program to request DL/I services.
(3) In telephony, a physical or logical connection (association) between one or more parties in a telephone call. For example, a held call has two parties logically connected although they are physically disconnected.
(4) The action of bringing a computer program, a routine, or a subroutine into effect, usually by specifying the entry conditions and jumping to an entry point.
(5) Telephone call. Often used to mean a single runtime instance of a voice application.
(6) To transfer control to a procedure, program, routine, or subroutine.
(7) In Sametime, an audible message sent using a traditional phone call (POTS, PSTN). It may be IP based, or a hybrid using both IP and traditional phone.

callable interface (CI)
(1) In query management, the Common Programming Interface (CPI) that includes the definitions of the control blocks and constants used for the interface.
(2) The name of the interface program, the definition of the arguments passed to the interface program, and the definition of the data structures passed to the interface program.

callable service
A program service provided through the programming interface. See also action services.

call attachment facility (CAF)
A DB2 Universal Database for z/OS and OS/390 attachment facility for application programs that run in TSO or MVS batch. The CAF is an alternative to the DSN command processor and provides greater control over the execution environment.

callback
A way for another thread to notify an application thread that an event has happened.

call back
In WebSphere MQ, a requester message channel initiates a transfer from a sender channel by first calling the sender, then closing down and awaiting a call back.

callback function
See implementation function. See also user-defined node, user-defined parser.

callback handler
A mechanism that uses a Java Authentication and Authorization Service (JAAS) interface to pass a security token to the Web service security runtime for propagation in the Web service security header.

call center
(1) A central point at which all inbound calls are handled by a group of individuals on a controlled sequential basis. Call centers are usually a front end to a business such as airline ticketing or mail order.
(2) A place staffed by users in the Customer Service Representative access group, who can perform some functions on behalf of a customer. For example, they can update customer information, including the password; they can also update orders or place a new order. The forUser parameter is used to enable call centers.

call center dashboard
A user interface that provides information on how the telesales service representative, shift, or call center is performing.

call control
That set of telephony functions that includes call establishment, call transfer, and call disconnection (the program control of a telephone call).

call detail record (CDR)
In telephony, a unit of information containing data about a completed call, such as the time the call began, its duration and date, the originating extension, and the number called.

called number
See dialed number identification service.

called party
(1) Any person, device, or system that receives a telephone call. See also caller.
(2) See dialed number identification service.

called program
A program that is the object of a CALL statement combined at run time with the calling program to produce a run unit.

caller
(1) In voice mail, any person who makes a telephone call to a subscriber. See also user.
(2) The requester of a service.
(3) Any person, device, or system that makes a telephone call. Often used to refer to any user of a voice application, even when DirectTalk has made an outbound call and the user is really the called party. See also called party.

call forwarding
The process of sending incoming calls to a different number.

calling command ID
A numeric identifier for a command that calls an API function.

calling line identification presentation (CLIP)
An ISDN supplementary service that advises the called party of the caller's number: for example, by displaying it on a telephone display panel.

calling program
A program that calls another program.

CALL interface
A part of the external CICS interface (EXCI). The CALL interface consists of six commands that allow you to allocate and open sessions to a CICS system from non-CICS programs running under MVS/ESA; issue DPL requests on these sessions from the non-CICS programs; and close and deallocate the sessions on completion of the DPL requests.x For more details, see the External CICS Interface manual.

call level
The position of an entry (program or procedure) in the call stack. The first entry has a call level of 1. Any entry called by a level 1 entry has a call level of 2, and so on.

call level interface (CLI)
An API for database access that provides a standard set of functions to process SQL statements and related services at run time. See also embedded SQL.

call level number
A unique number assigned by the system to each call stack entry.

call message queue
A message queue that exists for each call stack entry within a job.

CallPath
Software that provides basic computer-telephony integration (CTI) enablement and comprehensive CTI functionality. This includes access to, and management of, inbound and outbound telecommunications.

call profile
In telephony, a set of characteristics that may be used when establishing or manipulating a program-controlled telephone call.

call session
The sequence of events that occurs from the time a call is initiated to the time all activities related to answering and processing the call are completed.

call stack
(1) A list of data elements that is constructed and maintained by the by the Java virtual machine (JVM) for a program to successfully call and return from a method.
(2) The ordered list of all programs or procedures currently started for a job. The programs and procedures can be started explicitly with the CALL instruction, or implicitly from some other event.

call stack entry
A program or procedure in the call stack.

call transfer
A series of actions that directs a call to another telephone number.

call-triggered flow
A data flow triggered by a direct call that the collaboration receives through the Server Access Interface. An access client initiates a call-triggered flow.

call user data (CUD)
User-specified data that can be placed in an X.25 call request packet to be sent to the adjacent node.

campaign
(1) A planned series of operations including advertisements and suggestive selling techniques, that are pursued to achieve a defined set of business objectives. In the WebSphere Commerce Accelerator, campaigns are used to coordinate and aggregate groups of campaign initiatives.
(2) A collection of rules, mappings, and e-mail promotions that are active for a specified period of time to achieve a desired goal.

campaign organizer
A run-time object called by rule content spots that determines which rule (from among all active campaigns, if any) to apply.

cancelation cleanup handler
A function that you can specify to perform an action, such as releasing resources, that occurs after the thread returns from the start routine and calls pthread_exit() or after a cancelation request is performed on the thread.

cancelation point
A function that causes a pending cancelation request to be delivered if the cancelation state is enabled and the cancelation type is deferred.

cancelation state
One of two values, which are either enabled or disabled, that describe whether cancelation requests in the current thread are acted on or held in a pending state. If the value is enabled, the cancelation request is acted on immediately and is based on the current cancelation type. If the value is disabled, the cancelation request is held in a pending state until it is enabled.

cancelation type
One of two values (deferred or asynchronous) that describe how cancelation requests in the current thread are acted on when the cancelation state is enabled. If the value is deferred, the cancelation request is held pending. If the value is asynchronous, the cancel request is acted on immediately, thus ending the thread with a status of PTHREAD_CANCELED.

canned map
A technique to achieve simulated windows using BMS. See also base map, overlay map.

canonical
In computer science, pertaining to an expression that conforms to a specific set of rules.

canonical address
In LANs, the IEEE 802.1 format for the transmission of medium access control (MAC) addresses for token-ring and Ethernet adapters. In canonical format, the least significant (rightmost) bit of each address byte is transmitted first. See also noncanonical address.

canonical format
A format for storing hierarchical names that displays the hierarchical attribute of each component of the name. For example, the canonical format for the name Reuben D. Smith/Ottawa/Acme/CA is: CN=Reuben D. Smith/OU=Ottawa/O=Acme/C=CA where: CN is the common name, OU is the organizational unit, O is the organization, and C is the region or country code.

capability
A set of access rights to a group of target instances.

capability data
In OSI, a confirmed data transfer service provided by the session layer to transfer a limited amount of data outside of an activity. Capability data can be used by two peers to exchange information about their capability to start an activity.

capability list
A list of associated resources and their corresponding privileges per user.

capacitor
An electronic part that permits storage of electricity.

capacity planner
A function that uses information about the system, such as a description of the system's workload, performance objectives, and configuration, to determine how the data processing needs of the system can best be met. The capacity planner then recommends, through the use of printed reports and graphs, ways to enhance performance, such as hardware upgrades, performance tuning, or system configuration changes.

capacity planning
(1) A method of translating growth in user demands into requirements for future computing resources. It projects future workload by taking into account the increase in existing applications and the introduction of new applications, thus allowing a prediction of performance, and helping in the evaluation of future configurations.
(2) The process of determining the hardware configuration needs and performance of a system.
(3) An analysis of processor loading and processor capacity, extending into real storage, other resources (channels, DASD, lines), and timings and response where necessary.

Capacity Upgrade on Demand
The capability to permanently activate one or more inactive processors without having to restart the server or interrupt the data flow of the business, through the purchase of a permanent processor activation. This capability adds significant value by enabling a fast and economical way to add capacity for new workloads, enabling the server to adapt to unexpected performance demands. See also IBM eServer On/Off Capacity on Demand.

capture
(1) In Q replication, to gather changes from a source database and store them in a queue for replication to a target database.
(2) The process by which your Acquirer receives payment from the customer's financial institution and remits the payment to you. A "capture" is the guarantee that the funds are available and that the transfer will take place.
(3) In SQL replication, to gather changes from a source database and store them for replication to a target database. These changes can come from the DB2 log or journal or from source transactions in a non-DB2 relational database.
(4) In event publishing, to gather changes from a source database and send them in XML format through a queue to a user application.

Capture control server
(1) A system where the Capture program is running. See also control server.
(2) In SQL replication, a database or subsystem that contains the Capture control tables, which store information about registered replication source tables.

Capture latency
In SQL replication, an approximate measurement of how recently the Capture program committed data to a CD table. See also Apply latency.

Capture program
In SQL replication, a program that reads database log or journal records to capture changes that are made to DB2 Universal Database source tables and store them in staging tables. See also Apply program, Capture trigger, Q Capture program.

Capture schema
In SQL replication, a name that identifies the control tables that are used by a particular instance of the Capture program.

Capture trigger
In SQL replication, a mechanism that captures delete, update, or insert operations that are performed on non-DB2 source tables. See also Apply program, Capture program.
card
(1) WML document that provides user-interface and navigational settings to display content on mobile devices. See also deck.
(2) An electronic circuit board that is plugged into a slot in a system unit to give it added capabilities.

card enclosure
The area in the system unit that contains the logic cards.

cardinality
(1) The specific number of elements in a specific relationship (1:2, 0:1, etc.). Unified Modeling Language (UML) cardinality may assume finer granularity than does the database modeling community. The two uses (UML and database) are similar, but not synonymous.
(2) The number of rows in a database table.

card reader/line printer
In CICS terminal control, a pair of input and output sequential data sets that simulate a card reader and line printer. See discussion of sequential (BSAM) devices in the CICS Transaction Server System Definition Guide or the CICS/VSE System Definition and Operations Guide.

card type
A 4-digit identifier printed on the logic card.
carriage control character
The first character of an output record (line) that is to be printed; it determines the movement before or after the next line is printed (write, space, or skip). See also control character.

carrier
A continuous frequency (a pulse train, or an electric or electromagnetic wave) that may be varied by a signal bearing information to be transmitted over a communication system.

carrier sense
In a local area network, an ongoing activity of a data station to detect whether another station is transmitting.

Carrier Sense Multiple Access with Collision Detection (CSMA/CD)
A media access method that monitors another station's transmissions. If the data station detects another signal during transmission, it stops transmitting, sends a jam signal, then waits for a variable time before trying again.

CART
See command and response token.

CAS
(1) See coordinating address space.
(2) See channel associated signaling.

cascade
In the Data Warehouse Center, to run a sequence of events. When a step cascades to another step, the steps run sequentially or concurrently. A step can also cascade to a program, which runs after the step finishes running.

cascade delete
The way in which DB2 Universal Database enforces referential constraints when it deletes all descendent rows of a deleted parent row.

cascaded initiator
An intermediate node in a transaction program network that uses the two-phase commit protocol.

cascaded menu
A menu that appears from, and contains choices related to, a cascading choice in another menu.

cascade rejection
In SQL replication, the process of rejecting a replication transaction because it is associated with a transaction that had a conflict detected and was itself rejected.

cascading
In high-availability cluster multiprocessing (HACMP), pertaining to a cluster configuration in which the cluster node with the highest priority for a particular resource acquires the resource if the primary node fails but relinquishes the resource to the primary node upon reintegration of the primary node into the cluster.

cascading choice
A choice on a menu that, when selected, presents another menu with additional related choices.

cascading replication
A replication topology in which there are multiple tiers of servers. A peer/master server replicates to a small set of read-only servers which in turn replicate to other servers. Such a topology off-loads replication work from the master servers.

cascading resources
Resources that can be taken over by more than one node. A takeover priority is assigned to each configured cluster resource group on a per-node basis. In the event of a takeover, the node with the highest priority acquires the resource group. If that node is unavailable, the node with the next-highest priority acquires the resource group, and so on.

cascading style sheet (CSS)
A file that defines a hierarchical set of style rules for controlling the rendering of HTML or XML files in browsers, viewers, or in print. A CSS includes a defined order of precedence to address cases when the definitions of any style element in a document conflict.

CASE expression
An expression that allows another expression to be selected based on the evaluation of one or more conditions.

case-insensitive search
A search result without consideration of the case of the string being searched.

CA splitting
In VSAM, to double a control area dynamically and distribute its CIs evenly when the specified minimum of free space is used up by more data.

cassette
A software component which supports a particular payment protocol.

cast
In programming languages, an expression that converts the value of its operand to a specified type.

cast function
A function that is used to convert instances of a source data type into instances of a different target data type. In general, a cast function has the name of the target data type and has one single argument whose type is the source data type. Its return type is the target data type.

CAS tone
See Customer Premise Equipment Alerting Signal tone.

casual connection
In an APPN network, a connection between an end node and a network node with different network identifiers.

catalog
(1) A Notes database on a Domino server that contains a list of other databases on the server. The catalog determines which database titles are available for searching.
(2) A set of tables and views that are maintained by the database manager. These tables and views contain information about the database, such as descriptions of tables, views, and indexes. See also database catalog, information catalog, RDBMS catalog.

catalog asset store
A collection of catalog artifacts that creates a virtual catalog. See also asset store, storefront asset store.

cataloged procedure
In ESA and VSE, a set of job control statements (JCL) that has been placed in a library and can be retrieved by name. In ESA, a cataloged procedure can be executed by an ESA START command or by an EXEC statement in JCL. In VSE, a cataloged procedure can be executed by an EXEC statement in JCL. |

catalog entry
An object in an online catalog. An entry has a name, description, list price, and other details. The entry can be as simple as a SKU; it may also be a product that is automatically broken down into its component items such as a bundle or package.

catalog group
A collection of one or more catalog entries or catalog groups which create a navigational hierarchy for an online catalog.

catalog node
See catalog partition. The catalog node can be a different node for each database.

catalog partition
In a partitioned database environment, the database partition where the catalog tables for the database are stored. Each database in a partitioned database environment can have its catalog partition on a different database partition server. The catalog partition for a database is automatically created on the database partition server where the CREATE DATABASE command is run.

catalog table
A table that is automatically created in the DB2 Universal Database catalog when the database is created. These tables contain information about the database and its objects, such as the definitions of database objects and security information about the authority that users have on these objects.

catalog view
(1) In DB2 UDB for iSeries, one of a set of views containing information about the objects in a collection, such as tables, views, indexes, columns, packages, and constraints.
(2) A SYSCAT or SYSSTAT view on the catalog table.
(3) In DB2 UDB for iSeries, one of the views contained in a UDB for iSeries SQL catalog.
(4) One of several views created when DB2 Net Search Extender is enabled for a database. Catalog views contain information about text search configurations and indexes in the database.

catch-up
(1) In a remote journal network, the process of replicating journal entries that existed in the journal receivers of the source journal before the remote journal was activated.
(2) In XRF, a process in which the active CICS system uses CAVM message services to send a stream of messages describing the current state of all its VTAM terminals, to the message data set and thence to the alternate CICS system.

catch up
To update the resources in the workbench from the team stream by accepting the incoming changes from the stream.

catchup state
In high availability disaster recovery (HADR), a state in which the standby database might not have applied all logged operations that occurred at the primary database. In this state, the standby database retrieves and applies previously generated log data to synchronize with the primary database. There are two types of catchup states: local and remote.

categorization
In Discovery Server, the third phase of the K-map Building service that involves the process of using an existing taxonomy to route new documents to the appropriate categories. Categorization continuously assigns newly discovered or modified documents to new and existing categories.

category
(1) An optional grouping of messages that are related in some way. For example, messages that relate to a particular application.
(2) In Discovery Server, sets of documents and/or subcategories that contain similar themes and subjects. Discovery Server mathematically models and analyzes documents for similar word patterns that comprise themes and then groups them together into categories. K-map Editor lets taxonomy editors further customize categories, and the K-map lets users browse and search for information within the categories.
(3) A group within a system of classification whose contents share similar properties. In WebSphere Commerce, categories are used to organize products or services offered by the store. For example, a clothing store may include categories arranged by lifestyle (casual, formal, outdoor), gender (men, women), or age (infants, children, adults). A category is usually implemented as a catalog group. See also category page.
(4) The recommended security specifications needed for both the CICS transaction definitions and the corresponding RACF profiles.
(5) In Notes/Domino, a word, phrase, or number used to group documents in a view.

category 1 transaction
A set of CICS transactions categorized according to the level of security checking required for them. Transactions in this category are never associated with a terminal: that is, they are for CICS internal use only and should not be invoked from a user terminal. For this reason, CICS does not perform any security checks when it initiates transactions in this category for its own use.

category 2 transaction
A set of CICS transactions categorized according to the level of security checking required for them. Transactions in this category are either initiated by the terminal user or are associated with a terminal. You should restrict authorization to initiate these transactions to userids belonging to specific RACF groups.

category 3 transaction
A set of CICS transactions categorized according to the level of security checking required for them. Transactions in this category are either invoked by the terminal user or associated with a terminal. All CICS users, whether they are signed on or not, require access to transactions in this category. For this reason, they are exempt from any security checks and CICS permits any terminal user to initiate these transactions. Examples of category 3 transactions are CESN and CESF, to sign on and off, respectively.

category bean
A bean that logs information about content categories.

category link
In Discovery Server, a link in the K-map or in the Affinities field of a user's profile that opens a K-map category.

category manager
A defined role in WebSphere Commerce that manages the category hierarchy by creating, modifying, and deleting categories. The category hierarchy organizes products or services offered by the store. The category manager also manages products, expected inventory records, vendor information, inventory, and return reasons.

category page
A Web page in an online store that displays product categories. Category pages connect customers to child category pages or to products that belong to the selected category. See also category, child category.

category table
A dynamic table that displays category information in a series of rows and columns.

category tree
In Discovery Server, the hierarchy of categories that the K-map displays.

CAVM
See CICS availability manager.

CAVM message data set
In XRF, a data set used by the active CICS system to transmit messages to the alternate CICS system about the current state of resources, and when the XRF control data set is unavailable, for the secondary surveillance signals of the active and alternate CICS regions.

CBC
See cipher block chaining.

CBD
See component-based development.

CBIPO
See Custom-Built Installation Process Offering.

CBJ
See Class Broker for Java.

CBR
See content based routing.

CBX
See computerized branch exchange.

CC
(1) See change control.
(2) See clearing channel.

cc
See control character.

CCA
See Common Cryptographic Architecture.

CCB
(1) See connection control block.
(2) See command control block.

CCD table
See consistent-change-data table.

CCF
(1) See channel control function.
(2) See Common Connector Framework.

CCH
See Comite de Coordination de l'Harmonisation.

CCMS
See Configuration Change Management System.

CCP
See Communication Control Program.

CCS
(1) See Common Communications Support.
(2) See common channel signaling.

CCSID
See coded character set identifier.

CCSID 65534
See coded character set identifier 65534.

CCSID 65535
See coded character set identifier 65535.

CCTL
See coordinator control subsystem.

CD
See compact disc.

CDB
(1) See conversation data block.
(2) See communications database.

CDF
See channel definition file.

CDK
See connector development kit.

CDMA
See code division multiple access.

CDNM session
See cross-domain network manager session.

CDPD
See cellular digital packet data.

CD-R
See compact disc - recordable.

CDR
See call detail record.

CDRA
See Character Data Representation Architecture.

CD read/write drive (CD-RW drive)
A CD drive that can be read from and written to.

CDRM
See cross-domain resource manager.

CD-ROM (compact-disc read-only memory)
High-capacity read-only memory in the form of an optically read compact disc.

CDRSC
See cross-domain resource
.
CD-RW drive
See CD read/write drive.

CDS
See class definition statement.

CDSA
See CICS dynamic storage area.

CDS clerk
The software that provides an interface between client applications and CDS servers.

CDT
See class descriptor table.

CD table
See change-data table.

CE area
The name of a reserved area on disk used for analyzing hardware.

CEB
See conditional end bracket.

CECI
See command-level interpreter.

CelDial sample catalog
A sample information catalog (ICCSAMP) available when you install the Information Catalog Center. An administrator initializes the catalog, and users can use the sample data to become familiar with the Information Catalog Center.

cell
(1) One or more processes that each host run-time components. Each cell has one or more named core groups.
(2) A unique combination of dimension values. Physically, a cell is made up of blocks of pages whose records all share the same values for each clustering column.
(3) An arbitrary grouping of one or more nodes in a WebSphere Application Server distributed network.

cell-scoped binding
A binding scope where the binding is not specific to, and not associated with any node or server. This type of name binding is created under the persistent root context of a cell.

cellular digital packet data (CDPD)
A standard for transmitting data over a cellular network that places the data in digital electronic envelopes and sends it at high speed through underused radio channels or during pauses in cellular phone conversations.

Cellular Telecommunications Industry Association (CTIA)
A trade group that represents cellular, PCS, and enhanced specialized mobile radio carriers.

Celsius
Pertaining to a thermometric scale at which water boils at 100 degrees and freezes at 0 degrees in standard atmospheric pressure.

central directory architecture
Directory architecture in a Domino domain in which some servers store configuration directories and use primary Domino Directories on remote servers for lookups.

central institution
An organization that performs clearing, netting, or settlement for a financial community. Typically, but not necessarily, a national or central bank.

centralized directory service
In OSI, a method of organizing directory services so that one node provides directory service for other nodes. OSI Communications Subsystem supports only centralized directory service.

centralized processing
In CICS, processing in which the application is processed on a central processor, which users access using a terminal.

centralized script management
The process of managing scripts centrally in the OS/390 library and sending them to the fault-tolerant agents to be run.

central office (CO)
A telephone switching system that connects customer-premise business and subscriber lines to other customer lines or trunks, both locally or remotely. A central office is located on the edge of the telephone service provider's network, rather than on a customer's premises.

central processing unit (CPU)
The part of a computer that includes the circuits that control the interpretion and running of instructions. A CPU is the circuitry and storage that executes instructions. Traditionally, the complete processing unit was often regarded as the CPU, whereas today the CPU is often a microchip. In either case, the centrality of a processor or processing unit depends on the configuration of the system or network in which it is used.

central processor complex (CPC)
In a z/OS or OS/390 environment, a physical collection of hardware (such as an ES/3090) that consists of main storage, one or more central processors, timers, and channels.

central registry
A component of the License Use Management network topology. A server's database which logs requests for licenses, upgrades for licenses, and journals all license activity in a tamper-proof auditable file.

central resource registration
A process in which an APPN network node sends information about itself and its client end nodes to a central directory server.

central service
In MERVA, a service that uses resources that either require serialization of access, or are only available in the MERVA nucleus.

central site
In a network of servers, the server licensed to receive program temporary fixes (PTFs) and distribution media from IBM. This system is also used to provide problem handling support to other systems in a network. In a distributed data processing network, the central site is usually defined as the focal point in a communications network for alerts, application design, and remote system management tasks such as problem management.

central system
A single server that handles all of the communications to an endpoint system.

CEPT
See Conference Europeenne des Administrations des Postes et Telecommunications.

CERN
See Conseil Européen pour la Recherche Nucléaire.

certificate
In computer security, a digital document that binds a public key to the identity of the certificate owner, thereby enabling the certificate owner to be authenticated. A certificate is issued by a certificate authority.

certificate authority ( CA CA)
(1) An organization that issues certificates. The CA authenticates the certificate owner's identity and the services that the owner is authorized to use, issues new certificates, renews existing certificates, and revokes certificates.
(2) A trusted third-party organization or company that issues the digital certificates used to create digital signatures and public-private key pairs. The certificate authority guarantees that the individual granted the unique certificate is, in fact, who she claims to be. The role of the CA is to authenticate the entities (individuals or organizations) involved in electronic transactions. CAs are a critical component in data security and electronic commerce because they guarantee that the two parties exchanging information are really who they claim to be.

certificate authority certificate (CA certificate)
(1) In computer security, a digital document that identifies an organization that issues certificates.
(2) A binary file stored on the CA server's hard drive that contains a public key, a name, and a digital signature. The CA certificate identifies the Domino or third-party CA.

certificate revocation list
(1) A list of certificates that have been revoked before their scheduled expiration date. CRLs are maintained by the certification authority and used, during SSL handshaking, to ensure that the certificates involved have not been revoked.
(2) A list of certificates issued by a certificate authority (CA). The certificates on this list might not be expired, but are no longer trusted by the CA.

certificate store
The Windows name for a key repository.

certification
A process that creates special signed messages called certificates, which state that a particular public key is associated with a particular user or server name.

certifier ID
A file that generates an electronic "stamp" that indicates a trust relationship. It is analogous to the device used to stamp passports--it verifies that a person is trusted by that stamping authority.

CFIOP
See combined function IOP.

CF key
See command function key.

CF message
Confirmed message. When a sending MERVA Link system is informed of the successful delivery of a message to the receiving application, it routes the delivered application messages as CF messages, that is, messages of class CF, to an ACK wait queue or to a complete message queue.

CFRM
See Coupling Facility Resource Manager.

CFRM policy
In DB2 Universal Database for z/OS and OS/390, a declaration by an MVS administrator regarding the allocation rules for a coupling facility structure.

CFStruct
A WebSphere MQ object used to describe the queue manager's use of a Coupling Facility list structure

CGI
See Common Gateway Interface.

CGI program
A program that runs on a Web server and uses the common gateway interface (CGI) to perform tasks that are not usually done by the server, such as database access and form processing. The OS/400 operating system supports compiled CGI programs that are written in ILE C, ILE RPG, and ILE COBOL languages.

CGI script
A computer program that runs on a Web server and uses the Common Gateway Interface (CGI) to perform tasks that are not usually done by a Web server (for example, database access and form processing). A CGI script is a CGI program that is written in a scripting language such as Perl.

CGU
See character generator utility.

chain
(1) The name of a channel framework connection that contains an endpoint definition.
(2) A group of logically linked records that are transferred over a communications line.
(3) In RPG, an operation code that reads input records identified by specified relative record numbers or keys.
(4) In DFU, a way to change from one display format to another after the user signals that the first display format was completed.
(5) A group of request units delimited by begin-chain and end-chain. Responses are always single-unit chains.

chain assembly
In CICS intercommunication, a grouping of one or more request units to satisfy a single request. Instead of an input request being satisfied by one RU at a time until the chain is complete, the whole chain is assembled and sent to the CICS application satisfying just one request. This ensures that the integrity of the whole chain is known before it is presented to the application program.

chained data areas
A series of data areas in which each area contains the means of addressing the next. Chained data areas are implemented in VS COBOL II by means of the ADDRESS special register.

chained storage area
In COBOL, areas each of which contain a pointer to the next area in the chain.

chaining
A method of storing records in which each record belongs to a list or group of records and has a linking field for tracing the chain.

chain server topology
A topology that connects servers one-to-one, end-to-end. Information travels along the chain and then back.

Challenge Handshake Authentication Protocol (CHAP)
An authentication protocol that protects against eavesdropping by encrypting the user name and password. See also Password Authentication Protocol.

change accumulation
The process of merging log data sets and reducing the information they contain to the minimum required to perform recovery on a particular database or group of databases.

change aggregate table
In SQL replication, a type of replication target table that contains data aggregations that are based on the contents of a CD table. See also base aggregate table.

change authority
An object authority that allows a user to perform all operations on the object except those limited to the owner or controlled by object existence authority, object management authority, object alter authority, and object reference authority. The user can add, change, and delete entries in an object, or read the contents of an entry in the object. Change authority combines object operational authority and all the data authorities.

change bar
A character used in the left margin to indicate that a document line is changed.

change-capture replication
In replication, the process of capturing changes that are made to a replication source table and applying them to a replication target table. See also full refresh.

change control (CC)
The use of change management commands for the installation or removal of software or data.

change-data table (CD table)
In replication, a replication table at the Capture control server that contains changed data for a replication source table.

change description
Textual information that specifies the changes associated with a given revision of a project, document, or requirement. See also version information.

change-direction protocol
In SNA, a data flow control protocol in which the sending logical unit (LU) stops sending normal-flow requests, signals this fact to the receiving LU using the change-direction indicator (in the request header of the last request of the last chain), and prepares to receive requests.

changed subfile record
A subfile record into which the work station user has entered data, or a subfile record for which a write or change operation was issued with the DDS keyword SFLNXTCHG or DSPATR(MDT) in effect.

change history
The list of audit entries recorded for a resource.

change log
For directory shadowing, a record of changes made to directory entries, departments, and locations for the purpose of sending only the updates and not the entire directory to collecting systems.

change-managed relationship
A connection between two requirements that implies dependency or another type of relationship. RequisitePro tracks two types of change-managed relationships: hierarchical relationships and traceability relationships. Changes to either of the requirements can cause a "suspect" condition in the relationship. See also suspect relationship state.

change management
The process of planning (for example, scheduling) and controlling (for example, distributing, installing, and tracking) software changes over a network.

change number of sessions (CNOS)
An internal transaction program that regulates the number of parallel sessions between the partner LUs with specific characteristics.

change request (CRQ)
In System Manager, an instance of a change request description that has been submitted to run or is running. A change request is uniquely identified by the change request name and a sequence number.

change request description (CRQD)
An OS/400 object that describes a change to be made to the computing environment. The object, which is maintained only at the central site server or servers, consists of a list of activities that describe the steps needed to make the change.

change set
A list of related versions associated with a Unified Change Management (UCM) activity. ClearCase records the versions that developers create while working on an activity. An activity uses a change set to record the versions of files that are delivered, integrated, and released together.

channel
(1) An entry point to the Web services gateway that carries requests and responses between Web services and the gateway.
(2) A point-to-point physical link to transport data. There are 24 channels on a T1 trunk, and 30 on an E1 trunk. See also conversation, trunk.
(3) A functional unit, controlled by the processor, that handles the transfer of data between processor storage and local peripheral equipment.
(4) A specialized Web application within a portal to which a user can subscribe. See also open content syndication channel.
(5) A group of channel items that are related to each other. For example, a channel called 'IBM News' would contain a group of news stories about IBM.

channel associated signaling (CAS)
A method of communicating telephony supervisory or line signaling (on-hook and off-hook) and address signaling on T1 and E1 digital links. The signaling information for each traffic (voice) channel is transmitted in a signaling channel permanently associated with the traffic channel. On T1 links, supervisory signaling is sent in the traffic channel using robbed-bit signaling (RBS). On E1 links, a separate channel is used to send signaling. Address signaling can be transmitted either in the signaling channel (out-of-band) or in the traffic channel (in-band). See also common channel signaling.

channel bank
A device that converts an analog line signal to a digital trunk signal.

channel code
A number from 1 to 12 that identifies a position in a forms-control buffer or a page definition.

channel control function (CCF)
A program to move messages from a transmission queue to a communication link, and from a communication link to a local queue, together with an operator panel interface to allow the setup and control of channels.

channel definition file (CDF)
A file containing communication channel definitions that associate transmission queues with communication links.

channel event
An event reporting conditions detected during channel operations, such as when a channel instance is started or stopped. Channel events are generated on the queue managers at both ends of the channel.

channel exit program
A user-written program that is called from one of a defined number of places in the processing sequence of a message channel agent (MCA).

channel framework
A common model for connection management, thread usage, channel management, and message access within WebSphere Application Server.

channel group
A group of channels defined for a particular MERVA Liquidity Manager installation. The channels in a group need not all use the same currency.

channel initiator
A component of WebSphere MQ distributed queuing that monitors the initiation queue to see when triggering criteria have been met and then starts the sender channel.

channel item
A single news item or other piece of syndicated content.

channel link
A System/390 I/O channel-to-control-unit interface that has an SNA network address. A channel link can be a subarea link, a peripheral link, a LEN link, or an APPN link.

channel listener
A component of WebSphere MQ distributed queuing that monitors the network for a startup request and then starts the receiving channel.

channel manager
A defined role in WebSphere Commerce that manages the channel hub, as well as the distributors and resellers associated with that hub, including creating and importing distributor and reseller contracts.

channel number
The identifying number assigned to a licensed channel on the T1 or E1 trunk that connects DirectTalk to the switch, channel bank, or channel service unit.

channel process (CHP)
(1) In WebSphere Voice Server, the system process that manages call flow.
(2) The AIX process that executes the logic of the state table; each active caller session has one active channel process.

channel service unit ( CSU CSU)
(1) An American Telephone and Telegraph (AT&T) unit that is part of the AT&T nonswitched digital data system.
(2) A device used to connect a digital phone line to a multiplexer, a channel bank, or directly to another device producing a digital signal. A CSU performs certain line-conditioning and equalization functions, and responds to loopback commands sent from the central office (CO).

channel status word (CSW)
An area in storage used to indicate the status of a device and channel involved in an I/O operation.

channel switch
The rerouting of an outgoing and not yet scheduled message to another clearing channel.

CHAP
See Challenge Handshake Authentication Protocol.

CHAPS
See Clearing House Automated Payment System.

CHAPS-Euro
The Euro-denominated RTGS payment system operated by the CHAPS Clearing Company Ltd. and comprising a network, central message handling software, elements of members' interfaces to the network, and the Bank of England's central interface.

character
Any symbol that can be entered on a keyboard, printed, or displayed. For example, letters, numbers, and punctuation marks are all characters.

character array
A named list or table of character data.

character cell
In the GDDM function, the imaginary box whose boundaries govern the size, orientation, and spacing of individual characters to be displayed on a work station.

character code
In iSeries Access, an ASCII or EBCDIC value assigned to the symbols or functions that are used by a computer.

character-coded
See unformatted. See also field-formatted.

character constant
(1) The actual character value (a symbol, quantity, or constant) in a source program that is itself data, instead of reference to a field that contains the data. See also numeric constant.
(2) In the C language, a character or an escape sequence enclosed in quotation marks.

character conversion
The process of changing data from one character coding representation to another.

Character Data Representation Architecture (CDRA)
An IBM architecture that defines a set of identifiers, resources, services, and conventions to achieve consistent representation, processing, and interchange of graphic character data in heterogeneous environments.

character data representation identifier
A tag that is used to achieve data integrity. The Character Data Representation Architecture specifies that you should tag all character data as it flows through the system. You can tag using a short-form or a long-form identifier. A coded character set identifier (CCSID) is an example of a character data representation identifier.

character encoding
The mapping from a character (a letter of the alphabet) to a numeric value in a character code set. For example, the ASCII character code set encodes the letter "A" as 65, while the EBCIDIC character set encodes this letter as 43. The character code set contains encodings for all characters in one or more language alphabets.

character expression
A character constant, a simple character variable, an element of a character array, a character-valued function reference, a substring reference, or a sequence of the above separated by the concatenation operator and parentheses.

character field
An area that is reserved for information that can contain any of the characters in the character set. See also numeric field.

character format
In REXX, a format that is used in the REXX conversion functions to indicate that data is in a textual form as opposed to machine-readable form.

character generator utility (CGU)
A function of the Application Development ToolSet licensed program that is used to define and maintain user-defined double-byte characters and related sort information.

character grid
In Business Graphics Utility, an invisible network of uniformly spaced horizontal and vertical lines covering the chart area. Used by the Business Graphics Utility to determine the physical dimensions of the chart and the placement of the data on it.

character grid unit
In Business Graphics Utility, the distance between two adjacent horizontal or vertical lines on a character grid.

character ID
See character identifier.

character identifier (character ID)
(1) The standard identifier for a character, regardless of its style. For example, all uppercase A's have the same character identifier.
(2) On a server, a 4-byte binary value. The value is a concatenation of the graphic character set global identifier followed by the code page global identifier. For example, the character identifier for German (feature 2929) is 00697 00273.

character key
A keyboard key that allows the user to type into the system the character shown on the key. See also function key.

character large object ( CLOB CLOB)
(1) A character string that contains single-byte characters with an associated code page.
(2) A data type that contains a sequence of characters (single-byte, multi-byte, or both) that can range in size from 0 bytes to 2 gigabytes less 1 byte. In general, character large object values are used whenever a character string might exceed the limits of the VARCHAR type. See also binary large object.

character large object string
See character large object. See also binary large object.

character operator
A symbol representing an operation to be performed on character data, such as concatenation (joining the data or fields) in the control language (CL).

character printer
A device that prints a single character at a time. (T) (A) See also line printer.

character set
(1) A defined set of characters with no coded representation assumed. A character set may be defined by alphabet, by language, by script, or any combination of these definitions. A character set is not, however, the same as a display font or printer font.
(2) A defined set of characters that can be recognized by a configured hardware or software system.
(3) A defined set of characters. For example, 26 nonaccented letters A through Z.
(4) A set of binary codes that represent specific text characters.

character set identifier 65534
The character set identifier (CCSID) that is used to show that a CCSID value for data at this level of processing is not relevant. When CCSID 65534 (FFFE ) is associated with data, a CCSID value for the data should be obtained from the tagged fields of elements that are at a lower level in the defined hierarchy. For example, a file has CCSIDs tagged for each individual field it contains. If the file is tagged with CCSID 65534, processing is based on the CCSIDs assigned to each individual field instead of the CCSID assigned to the file.

character set identifier 65535
The character set identifier (CCSID) that is used to show that data associated with the CCSID should not be processed as coded-graphic-character data.

characters per inch (cpi)
The number of characters printed horizontally within an inch across a page.

character string
(1) A sequence of bytes that represent bit data, single-byte characters, or a mixture of single-byte and multibyte characters.
(2) A sequence of consecutive characters that are treated as a unit.

character string delimiter
The characters that are used to enclose character strings in delimited ASCII files that are imported or exported.

character variable
(1) In the C language, a data object whose value can be changed while a program is running and whose data type is a signed or unsigned character.
(2) Character data whose value is assigned or changed while the program is running.

charge-back account
An account used for tracking computing resource usage by business departments or projects. Examples of charge-back accounts are "Marketing Department" or "Summer catalog project".

chart
A picture defined in terms of graphics primitives and graphics attributes.

chart area
In the GDDM function, the part of the picture space in which a business chart is to be drawn.

chart format
In Business Graphics Utility, an object containing chart characteristics, such as the chart type, chart heading, legend position, and so on. The chart format does not include the data values to be plotted. The system-recognized identifier for the object type is *CHTFMT.

chart layout
In Business Graphics Utility, the arrangement of the various parts in the chart area and surrounding margins.

CHASE
In SNA, a command used by the host system to determine when the secondary logical unit has finished processing all previously sent response units.

chat
(1) In Sametime, the sending of typed messages between online meeting participants. The term chat replaces the terms instant message (IM) and conference. It pertains to a one-on-one chat or a chat with multiple participants.
(2) In LearningSpace - Virtual Classroom session, the sending of typed messages between session participants. There are two types of chat: session chat, which allows a user to send messages to everyone in the session and private chat, which allows a user to send a message to an individual participant.

chat transcript
The log of the typed messages between Sametime meeting participants during a chat meeting. Sametime chat transcripts can be saved as .txt files on each user's hard drive.

cheat sheet
An interface that guides users through the wizards and steps required to perform a complex task, and that links to relevant sections of the online help.

check box
A square box with associated text that represents a choice. When a user selects the choice, the check box is filled to indicate that the choice is selected. The user can clear the check box by selecting the choice again, thereby deselecting the choice.

CHECK clause
In SQL, an extension to the SQL CREATE TABLE and SQL ALTER TABLE statements that specifies a table check constraint.

check condition
A restricted form of search condition used in check constraints.

check constraint
(1) A rule that is associated with a table that specifies the values allowed in one or more columns of every row in the table. A check constraint is optional and can be defined using the CREATE TABLE or the ALTER TABLE statement. See also unique constraint, informational constraint.
(2) In DB2 UDB for iSeries, a rule that limits the values allowed in a column or group of columns. A check constraint can be defined for either a table or a file.

check digit
The far right number of a self-check field used to verify the accuracy of the field.

check in
(1) In certain software configuration management (SCM) systems, to copy files back into the repository after changing them.
(2) In the Application Development Manager feature of the Application Development ToolSet licensed program, to release the access key for a part so other users can change the part.

checkin
The second part of the two-part process that extends a branch of an element's version tree with a new version. Checkin completes the process by creating the new version.

checkin screen
The screen identifying the host screen that should be active for a connection to be considered ready to be returned to the connection pool. If the application is not on the screen specified by the checkin screen, the connection will be discarded or recycled in attempt to return the connection to the host screen specified by the checkin screen. The checkin screen is only meaningful if connection pooling is specified for a connection.

check integrity
The condition that exists when each row in a table conforms to the check constraints that are defined on that table. Maintaining check integrity requires DB2 to enforce table check constraints on operations that add or change data.

check out
(1) In certain software configuration management (SCM) systems, to copy the latest revision of a file from the repository so that it can be modified.
(2) In the Application Development Manager feature of the Application Development ToolSet licensed program, to copy a part to a specific development group, if it is not there already, and to set the access key for the part so no other application developer can change it.

check pending
(1) A state into which a table can be put where only limited activity is allowed on the table and constraints are not checked when the table is updated.
(2) A state that occurs on OS/400 when data for a constraint for a database file cannot be verified as valid. A constraint could be either a referential constraint or a check constraint.

checkpoint
(1) A point at which the database manager records internal status information on the log; the recovery process uses this information if the subsystem abnormally terminates. |
(2) A place in a program at which a check is made, or at which a recording of data is made to allow the program to be restarted in case of interruption.

checkpoint size
In OSI X.400, the maximum amount of data (in units of 1024 bytes) that can be sent between two minor synchronization points. The checkpoint size is used by the X.400 reliable transfer server.

checksum
In error detection, a value that is produced by accumulating a quantity of data. The checksum and the accumulated data are sent together so that the receiver can verify the integrity of the data by regenerating the checksum and comparing it to the previously generated checksum.

checksum protection
(1) In TCP/IP, the sum of a group of data associated with the group and used for error checking purposes.
(2) A function that protects data stored in an auxiliary storage pool from being lost because of the failure of a single disk. When checksum protection is in effect and a disk failure occurs, the system automatically reconstructs the data when the system program is loaded after the device is repaired. See also device parity protection, mirrored protection.

checksum set
Units of auxiliary storage defined in groups to provide a way for the system to recover data if a disk failure occurs when checksum protection is in effect.

child
In a generalization relationship, the specialization of another element, the parent. See also parent.

child activity
An activity that has been defined by another activity, its parent .

child business object
A business object that is contained or referenced by another business object. When the full child business object is part of its parent's hierarchy, the child is contained by the parent. See also array attribute, foreign key attribute, single-cardinality attribute.

child category
A category that is subordinate to another category in a hierarchy. See also category page, parent category.

child class
A class that inherits instance methods, attributes, and instance variables directly from the parent class (also known as the base class or superclass), or indirectly from an ancestor class.

child component
Optional second or lower level of a hierarchical item type. Each child component is directly associated with the level above it.

child document
In Notes/Domino, a document that inherits values from another document (the parent document).

child lock
In explicit hierarchical locking, a lock that is held on a table, a page, a row, or a large object. Each child lock has a parent lock. See also parent lock.

child organizational entity
One or more further levels of organizational entities that exist beneath the parent organizational entity.

child process
A process that is created by a parent process and that shares the resources of the parent process to carry out a request.

child requirement
A requirement that participates in a hierarchical relationship with a parent requirement. A child can have only one parent requirement. See also hierarchical requirement, parent requirement, peer requirement, root requirement.

child window
A window that appears within the border of its parent window (either a primary window or another child window). When the parent window is resized, moved, or destroyed, the child window also is resized, moved, or destroyed. However, the child window can be moved or resized independently from the parent window, within the boundaries of the parent window.

choose
In iSeries Access, to use the mouse or keyboard to pick a command or button to begin an action. See also select.

CHP
See channel process.

cHTML
See Compact Hypertext Markup Language
.
CI
(1) See control interval.
(2) See callable interface.

CIC
See circuit identification code.

CICS ( CICS Customer Information Control System)
An IBM licensed program that provides online transaction-processing services and management for business applications.

CICS attachment facility
A facility that provides a multithread connection to DB2 Universal Database to allow applications that run in the CICS environment to execute DB2 commands.

CICS availability manager (CAVM)
In XRF, the mechanism that provides integrity for a CICS system with XRF. The CAVM uses the control data sets and the message file to handle communication between the active and alternate systems. See also availability manager.

CICS business transaction services (BTS)
CICS domains that support an application programming interface (API) and services that simplify the development of business transactions .

CICS client
A member of the family of CICS workstation products that provide a standard set of functions for client/server computing. Each CICS client is designed to run on a particular operating system. Each can attach to a range of CICS server systems, and provides access to resources owned by the servers. See also external call interface, external presentation interface.

CICS database adapter transformer
A component of the CICS-DBCTL interface in the CICS address space. Also referred to in IMS publications as the adapter or the adapter/transformer. Its main responsibility is to communicate with the database resource adapter (DRA).

CICS default userid
The userid assigned to a terminal user before the user signs on to CICS, and after the user signs off.

CICS-deployed JAR file
A deployed JAR file, produced specifically (via several intermediate stages) for the CICS EJB server, which has been stored on the hierarchical file system (HFS) used by the host operating system. This name is reserved for the original "deployed JAR file" on the HFS of a CICS system. (There are no specific names for JAR files in the various intermediate stages of deployment)

CICS-DL/I router
Forms the interface between application programs and the DL/I call processor. It accepts requests for remote, local, or DBCTL database processing.

CICS dynamic storage area (CDSA)
(1) A storage area allocated from CICS-key storage below the 16MB line. The size of the CDSA is controlled by the CDSASZE system initialization parameter.
(2) In CICS/VSE, the CICS DSA is preallocated at system initialization, and is the area of storage left within the CICS partition after the CICS nucleus has been loaded. The size of the partition is determined by the EXEC DFHSIP SIZE parameter.

CICS EJB server
One or more CICS regions that support enterprise beans. A logical CICS EJB server typically consists of multiple (cloned) CICS listener regions and multiple (cloned) CICS AORs. The listener regions and AORs may be combined into listener/AORs.

CICS group
An OS/400 library containing the CICS resource definition for CICS tables.

CICS Internet gateway
A workstation application that can accept requests from Web browsers and route them into CICS. It uses a CICS client and the EPI.

CICS-key
Storage protection key in which CICS is given control (key 8) when CICS storage protection is used. This key is for CICS code and control blocks. CICS-key storage can be accessed and modified by CICS. Application programs in user-key cannot modify CICS-key storage, but they can read it. CICS-key storage is obtained in MVS key-8 storage. See also user-key storage.

CICS-maintained data table (CMT)
A type of CICS data table, for which CICS automatically maintains consistency between the table and its source data set. All changes to the data table are reflected in the source data set and all changes to the source data set are reflected in the data table.

CICS messages and codes data set (DFHCMACD)
A VSAM key-sequenced data set (KSDS) that is created and loaded by running the DFHCMACI job. Serv