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UA
(1) See user agent.
(2) See unnumbered acknowledgment.

UACC
See universal access authority.

UBM
See unified buffer manager.

UCM
See Unified Change Management.

UCS
See universal character set.

UCS-2
A 2-byte (16-bit) encoding scheme based on ISO/IEC specification 10646-1. UCS-2 defines three levels of implementation: Level 1-No combining of encoded elements allowed. Level 2-Combining of encoded elements is allowed only for Thai, Indic, Hebrew, and Arabic. Level 3-Any combination of encoded elements are allowed.

UDC
See user-defined character.

UDDI
(1) See Universal Discovery Description and Integration.
(2) See Universal Description, Discovery, and Integration.

UDDI Business Registry
A collection of peer directories that contain information about businesses and services.

UDDI node
A set of Web services that supports at least one of the Universal Description, Discovery, and Integration (UDDI) APIs. A UDDI node consists of one or more instances of a UDDI application running in an application server or a cluster of application servers with an instance of the UDDI database.

UDDI node initialization
The process by which values are set in the Universal Description, Discovery, and Integration (UDDI) database and the behavior of the UDDI node is established.

UDDI node state
A description of the current status of the Universal Description, Discovery, and Integration (UDDI) node.

UDDI policy
A statement of the required and expected behavior of a Universal Description, Discovery, and Integration (UDDI) registry that is specified through policy values that are defined in the UDDI specification.

UDDI property
A characteristic or attribute that controls the behavior of a Universal Description, Discovery, and Integration (UDDI) node.

UDDI registry
A distributed registry of businesses and their service descriptions that adheres to the Universal Description, Discovery, and Integration (UDDI) standard for managing the discovery of Web services. UDDI registries come in two forms, public and private, both of which are implemented in a common XML format.

UDDS
See user-defined data stream.

UDF
See user-defined function.

UDFS disk pool
An independent disk pool that contains only user-defined file systems. It cannot be a member of a disk pool group unless it is converted to a primary or secondary disk pool.

UDP
See User Datagram Protocol.

UDSA
See user dynamic storage area.

UDT
See user-defined type.

UEP
See user entry procedure.

UFS
See UNIX File System.

UI
(1) See unique identifier.
(2) See graphical user interface.

UIB
See user interface block.

uid
See user identification number.

UID
(1) See user identification.
(2) See unique identifier.

UIM
See user interface manager.

UIM tag language
An iSeries language supported by the user interface manager to define panels, menus, and help items.

U interface
In the reference model for the integrated services digital network (ISDN), the interface that includes the transmission line between the network terminator 1 (NT1) and the line transmission termination (LT).

UI part
An EGL declaration that is used for data presentation. The types of UI parts are forms, form groups, and UI records.

UI record
In EGL, a data structure that makes communication possible between an action program and a specific Web page. This type of record is used to migrate VisualAge Generator Web transactions.

Ultimedia Business Conferencing
An IBM licensed program that provides a solution for desktop business conferencing. Ultimedia Business Conferencing is a cooperative processing application that manages the conference from scheduling to completion.

UMR
See unique message reference.

UMT
See user-maintained data table.

UMTS
See Universal Mobile Telecommunications System.

unacknowledged service
In communications, a data transfer service that does not provide for an acknowledgment from data receiver to data sender that the data was received. An active data link connection does not need to be established between receiver and sender before sending the data. See also acknowledged service.

unambiguous cursor
A cursor that allows a DBMs to determine whether blocking can be used with the answer set. A cursor defined FOR FETCH ONLY or FOR READ ONLY can be used with blocking, whereas a cursor defined FOR UPDATE cannot. See also ambiguous cursor.

unary expression
An expression that contains one operand.

unary operator
In COBOL, a plus sign (+) or a minus sign (-) that precedes a variable or a left parenthesis in an arithmetic expression, which has the effect of multiplying the expression by +1 or -1, respectively.

unattended mode
In Operations Console, a state of the system when the local controlling system can automatically grant access to a remote request for control of the iSeries system as long as the local controlling system does not have control at the time of the request.

unattended node support
A set of functions allowing one or more VSE systems to run without an operator being present. The systems are connected to a single central host.

unauthorized access
Gaining access to resources within a computer system without permission.

unavailable
See varied off.

UNBIND
See unbind session.

unbind
In SNA, to deactivate a session between logical units.

UNBIND command
In SNA, a command used to reset the protocols for a session. See also BIND command.

unbind session (UNBIND)
A request to deactivate a session between two logical units (LUs).

unblocked signal
In POSIX, a condition that allows a signal-handling action associated with a signal to be performed. See also blocked signal.

unbound role
In the Reusable Asset Specification (RAS), a role in a collaboration that does not have a concrete element specified. Note that in Rational XDE, roles are known as association ends.

UNC
See Universal Naming Convention.

uncommitted read (UR)
(1) An isolation level that allows an application to access uncommitted changes of other transactions. The application does not lock other applications out of the row it is reading, unless the other application attempts to drop or alter the table. See also cursor stability, read stability, repeatable read.
(2) In DB2 UDB for iSeries, for a read-only cursor, an isolation level that permits any row read during a unit of work to be changed by application processes that are running concurrently, and permits any row changed by application processes that are running concurrently to be read even if that change has not been committed. For a cursor that can be updated, the uncommitted read level is identical to cursor stability. See also repeatable read.

unconfirmed service
In OSI, a service that does not indicate to the sender whether or not data or control information was properly received. An unconfirmed service involves only request and indication service primitives. See also confirmed service.

undelivered message queue
See dead-letter queue.

underlying connection
The representation of lower-layer connectivity that is used by higher-layer connectivity. For example, the physical connection that transports data between two IP hosts is an underlying connection.

underlying view
In DB2 Universal Database for z/OS and OS/390, the view on which another view is directly or indirectly defined.

underrun
(1) Loss of data caused by the inability of a transmitting device or channel to provide data to the communications control logic at a rate that is fast enough for the attached data link or loop.
(2) To run out of audio data to play, resulting in voice or music being audibly broken up or cut off.

undo
(1) To recover the last edit that has taken place.
(2) In a data entry database, a state that occurs when no changes have been committed in the database. The changes are still in main storage and are backed out from there.
(3) A state of a unit of recovery that indicates that the changes that the unit of recovery made to recoverable DB2 Universal Database for z/OS and OS/390 resources must be backed out.

undoable-in-transactional mode
In software distribution, a transactional mode that reserves disk space during the preparation phase for backup copies that are required for undoability. Using this mode minimizes the risk of failure that is caused by insufficient disk space during the commit phase, during which backup copies are made.

undoable mode
In software distribution, a mode of operation in which committed actions can be rolled back because a backup copy was saved.

undo/redo record
A log record used in recovery. The redo part of the record describes a change to be made to a WebSphere MQ object. The undo part describes how to back out the change if the work is not committed.

UN/EDIFACT
United Nations Standard for Electronic Data Interchange for Administration, Commerce and Transport.

unformatted
Pertaining to something that is not defined, organized, or arranged in a required manner.

unformatted system service (USS)
A communications function that translates a character-coded command, such as a LOGON or LOGOFF command, into a field-formatted command for processing by formatted system services. USS translates field-formatted replies and responses into character-coded requests for processing by a logical unit. See also formatted system service.

unicast
Transmission of data to a single destination. See also multicast.

Unicode
(1) A universal character encoding standard that supports the interchange, processing, and display of text that is written in any of the languages of the modern world. It also supports many classical and historical texts in a number of languages. The Unicode standard has a 16-bit international character set defined by ISO 10646.
(2) An international character encoding scheme that is a subset of the ISO 10646 standard. Each character supported is defined using a unique 2-byte code. See also Extended Binary Coded Decimal Interchange Code, American Standard Code for Information Interchange.

Unicode Transformation Format (UTF)
A method to translate Unicode characters into a fixed-length sequence of bits.

UNID
See universal ID.

unidentified user
A user of the OS/400 licensed program who uses the services of OS/400 but who is not automatically reported on by the license management function of OS/400. An example of an unidentified user is one who accesses an iSeries server through a gateway server that is not iSeries.

unidirectional replication
In Q replication, a configuration in which changes that occur at a source table are replicated over WebSphere MQ queues to a target table or are passed to a stored procedure to manipulate the data. Changes that occur at the target table are not replicated back to the source table.

UNID table
A table that maps a note's UNID to its note ID, which, in turn, can be mapped through the database's RRV table to the note's position within the database file.

unified buffer manager (UBM)
The component of the Notes storage facility that caches information about open databases.

Unified Change Management (UCM)
A process, layered on base ClearCase and ClearQuest functionality, for organizing software development teams and their work products. Members of a project team use activities and components to organize their work.

unified messaging
A messaging system in which a single copy of a message is stored and accessed by multiple applications (for example, voice mail and e-mail). See also integrated messaging.

Unified Modeling Language
A standard notation for the modeling of real-world objects as a first step in developing an object-oriented design methodology. UML is defined by the Object Management Group (OMG).

Uniform Resource Identifier ( URI URI)
(1) A compact string of characters for identifying an abstract or physical resource.
(2) A unique address that is used to identify content on the Web, such as a page of text, a video or sound clip, a still or animated image, or a program. The most common form of URI is the Web page address, which is a particular form or subset of URI called a Uniform Resource Locator (URL). A URI typically describes how to access the resource, the computer that contains the resource, and the name of the resource (a file name) on the computer. See also Uniform Resource Name.

Uniform Resource Locator ( URL URL)
(1) A sequence of characters that represents information resources on a computer or in a network such as the Internet. This sequence of characters includes the abbreviated name of the protocol that is used to access the information resource and the information that is used by the protocol to locate the information resource.
(2) The unique address of a file that is accessible in a network such as the Internet. The URL includes the abbreviated name of the protocol used to access the information resource and the information used by the protocol to locate the information resource.

Uniform Resource Name (URN)
A name that uniquely identifies a Web service to a client. See also Uniform Resource Identifier.

uninterruptible power supply (UPS)
A source of power from a battery installed between the commercial power and the system that keeps the system running, if a commercial power failure occurs, until it can complete an orderly end to system processing.

union
(1) In the C language, a variable that can hold any one of several data types, one data type at a time.
(2) An SQL operation that combines the results of two select statements. Unions are often used to merge lists of values that are obtained from several tables.

unique constraint
The rule that no two values in a primary key or key of a unique index can be the same. See also check constraint, referential constraint, informational constraint.

unique identifier ( UI UID)
(1) In the Information Catalog Center, a key for an object. The key is comprised of up to 16 properties, which, when concatenated in a designated order, uniquely identify the object during the import function.
(2) An identifier for each symbol in an activity diagram.

unique index
An index that ensures that no identical key values are stored in a table.

unique key
(1) A key that is constrained so that no two of its values are equal.
(2) A field or set of fields in a database file that must be unique, ascending, and cannot contain a null value. A unique key can become a parent key.

unique message reference (UMR)
An optional feature of MERVA ESA that provides each message with a unique identifier the first time it is placed in a queue. It is composed of a MERVA ESA installation name, a sequence number, and a date and time stamp.

unique product
A product that is uniquely identified to the OS/400 operating system by a product identifier (product ID) and version, release, and modification identifiers (Vx, Rx, Mx).

unique-weight sort sequence
A sort sequence in which each graphic character in the sequence has a weight different from the weight of every other graphic character in the sequence.

unit
The defined space within disk units that is addressed by the system.

unit abandoned
An orderable item that was placed in a shopping cart but not ordered at the time the data was extracted.

United Nations Standard Products and Services Classification (UNSPSC)
An open global standard for classifying products and services based on common function, purpose, and task.

unit number
The unique identifier of a storage unit within a disk unit or a disk unit subsystem configured on the system.

unit of compilation
In VS COBOL II, a section of source input from which the compiler produces a single object program. A unit of compilation can consist of a containing program and other programs nested within it.

unit of recovery
(1) A recoverable sequence of operations within a single resource manager, such as an instance of DB2 Universal Database for z/OS and OS/390. See also transaction.
(2) A sequence of operations within a unit of work between commit points.

unit of recovery descriptor (URD)
A CICS control block that describes the progress of a unit of work through the sequence of syncpoint messages. The URD is chained off the CSA, and survives any failure of either system. It is used for recovery at CICS restart.

unit of recovery ID (URID)
In DB2 Universal Database for z/OS and OS/390, the LOGRBA of the first log record for a unit of recovery. The URID also appears in all subsequent log records for that unit of recovery.

unit of work (UOW)
(1) In advanced program-to-program communications, the amount of processing that is started directly or indirectly by a program on the source system.
(2) A recoverable sequence of operations within an application process. At any time, an application process is a single unit of work, but the life of an application process can involve many units of work as a result of commit or rollback operations. In a DB2 Universal Database for z/OS and OS/390 multi-site update operation, a single unit of work can include several units of recovery. See also multisite update, unit of recovery, remote unit of work.
(3) In DB2 UDB for iSeries, a sequence of SQL commands that the database management system (DBMS) treats as a single entity. The DBMS ensures the consistency of data by verifying that either all the data changes made during a unit of work are performed or none of them are performed.
(4) A recoverable sequence of operations performed by an application between two points of consistency. A unit of work begins when a transaction starts or at a user-requested syncpoint. It ends either at a user-requested syncpoint or at the end of a transaction.

unit-of-work identifier
In advanced program-to-program communications, a unique label assigned to the unit of work. The ID is established when the program on the source system is started and is associated with each job started by that source system on the target system. The unit-of-work identifier provides a beginning-to-end audit trail within an APPC network.

unit-of-work table (UOW table)
In SQL replication, a control table that is stored in the Capture control server that contains commit records read from the database log or journal. The records show that a transaction or unit of work committed successfully and include a unit-of-recovery ID that can be used to join the unit-of-work table and the change data table to produce transaction-consistent change data.

unit reference code (URC)
(1) The last 4 characters of the SRC.
(2) A group of numbers displayed on the console or control panel that identifies failing parts, system or device states, or system or device status conditions.

universal access authority (UACC)
In RACF, the default access authority that applies to a resource if the user or group is not specifically permitted access to the resource. The universal access authority can be any of the access authorities.

universal character set (UCS)
The ISO-9000 standard that allows all data to be represented as 2 bytes (UCS-2) or 4 bytes (UCS-4). Encoding in the UCS-2 form can accommodate the necessary characters for most of the world's written languages.

Universal Description, Discovery, and Integration ( UDDI UDDI)
(1) A mechanism for clients to dynamically find other Web services
(2) A set of standards-based specifications for service description and discovery over the Internet.

Universal Discovery Description and Integration (UDDI)
A distributed registry of businesses and their service descriptions that adhere to the Universal Description, Discovery, and Integration (UDDI) standard for managing the discovery of Web services. UDDI registries come in two forms, public and private, both of which are implemented in a common XML format.

universal ID (UNID)
A unique 16-byte value that is assigned to a note when the note is first created. UNIDs are used when replicating database notes and when replacing or refreshing database design notes.

universally unique identifier ( UUID UUID)
The 128-bit numerical identifier that is used to ensure that two components do not have the same identifier. The identifier is unique for all space and time.

Universal Mobile Telecommunications System (UMTS)
The third generation mobile telecommunications standard, defined by the ITU, that increases transmission speed to 2 Mbps per mobile user and establishes a global roaming standard.

Universal Naming Convention (UNC)
The server name and network name (netname) combined. These names together identify the resource on the domain.

Universal Serial Bus (USB)
A Plug-and-Play (Intel standard) interface between a computer and add-on devices (such as keyboards and printers). USB allows a user to add a new device to a computer without having to add an adapter card or to turn the computer off.

universal system
Any server type except for an iSeries server. Windows and Linux are examples.

Universal Time Coordinated (UTC)
The international time standard. 00:00 UTC is midnight in Greenwich, England.

UNIX File System (UFS)
The native file system in the Solaris Operating Environment.

UNIX operating system
An operating system, developed by Bell Laboratories, that features multiprogramming in a multiuser environment. The UNIX operating system was originally developed for use on minicomputers, but has been adapted for mainframes and microcomputers. The AIX operating system is IBM's implementation of the UNIX operating system.

UNIX System Services
A component of z/OS or OS/390 that provides a UNIX environment.

unlike
Pertaining to two or more different operating environments. For example, unlike distribution is distribution between DB2 UDB for iSeries and DB2 UDB environments.

unlink
(1) In IDDU, to remove the association between a database file on disk and a file definition in a data dictionary. See also link.
(2) The action that DB2 Data Links Manager takes to give up control of a file that is no longer referenced in a table that contains a DATALINK column. A file can be unlinked as the result of such database actions as an SQL UPDATE, DELETE, or DROP TABLE.

unlinked file
In a DB2 Data Links Manager environment, a file that is controlled by the native file system on an operating system. By contrast, a linked file is controlled by the DLFF component.

unlisted meeting
A Sametime hidden meeting. Its name appears only in the "Meetings I Created" view of the Meeting Center. To attend an unlisted meeting, the user must know and enter the name of the meeting.

unload
To remove a volume from a tape unit or a direct access device.

unloaded
Pertaining to a status where the optical image associated with the selected image catalog entry that is not active or not loaded in the active virtual optical device. Only image catalog entries with a status of mounted or loaded can be accessed through the virtual optical device.

unlock
To release an object or system resource that was previously locked and return it to general availability.

unmanaged node
A node that is defined in the cell topology that does not have a node agent that manages the process. An unmanaged node is typically used to manage Web servers.

unmapped conversation
See basic conversation.

unnumbered
In communications, pertaining to a frame format that provides additional control functions, such as XID, DISC, DM, SABM, SABME, UA, and FRMR.

unnumbered acknowledgment (UA)
In communications, a data link command or response that acknowledges the receipt and acceptance of the SABM, SABME, and DISC command protocol data units.

unordered
In binary floating-point, describing the relationship that exists between two values when they cannot be arranged according to relative value. The relationship between two values is unordered either when a not-a-number is compared to any value or when infinity is compared to any value other than infinity.

unpacked decimal format
See zoned decimal format. See also packed decimal format.

unprotected conversation
An LU 6.2 conversation that has a synchronization level of none or confirm. If conversation errors or failures occur, the resources used by the application may be in inconsistent states. See also protected conversation.

unprotected field
A displayed field in which a user can enter, modify, or delete data.

unprotected logical unit of work
The logical unit of work that is used in an unprotected conversation.

unprotected logical unit of work identifier
The logical unit of work identifier that is used in an unprotected conversation.

unprotected storage
The part of the system auxiliary storage pool (ASP) that is not protected by mirrored protection or device parity protection.

unread journal log
A log that keeps unread lists synchronized between various replicas of a Notes database and records when a document's status changes from read to unread and vice-versa.

unrealized
Pertains to a Web diagram node that is not yet associated with an actual resource. See also realize.

unrecognized screen
In the 3270 terminal service development tools, a screen that cannot be identified by any of the recognition profiles currently defined.

unresolved flow
The business object whose receipt causes a collaboration to execute a scenario that ends unsuccessfully. An unresolved flow can be a failed flow, a deferred flow, an in-transit flow, or a possible duplicate flow.

unresolved import
An import whose type and name do not yet match the type and name of an export.

unscheduled meeting
In Lotus Learning Management System, an offering with no start and end date, and no events. Self-paced offerings are unscheduled.

unserviceable request
A request to run an activation of an activity which currently cannot be satisfied, either because the activity is not available or because the region on which the request must run is inaccessible.

unshunting
The process of attaching a transaction to provide an environment under which to resume the processing of a shunted unit of work.

unsolicited data
A type of inbound data that arrives on a connection where no FEPI conversation is active.

unsolicited-data handler
A user-provided part of a FEPI application that handles unsolicited inbound data.

unsolicited statistics
CICS statistics automatically gathered by CICS for a dynamically allocated and deallocated resource (for example, an autoinstalled terminal) when the resource is about to be deleted. See also end-of-day statistics, interval statistics, requested reset statistics, requested statistics.

UNSPSC
See United Nations Standard Products and Services Classification.

untracked terminal
In XRF (CICS/VSE only), a terminal belonging to a class mainly comprised of TCAM(DCB) terminals. These terminals lose their sessions at takeover. The CICS Transaction Server equivalent of this is class 3 terminal.

untrusted system
A system in a network over which you do not have control of security.

untyped parameter marker
A parameter marker that is specified without its target data type. It has the form of a single question mark.

unusable
In cross-site mirroring, pertaining to the mirror copy data state that indicates that the mirror copy contains incoherent data. This occurs (a) during synchronization because synchronization does not preserve the order of writes and (b) if a failure occurs while performing geographic mirroring in asynchronous mode.

unwanted takeover
In XRF, a takeover initiated by the alternate CICS system when there was not an actual failure on the active CICS system. This might be due to an unusual system condition which, although not a true failure, slowed down the active system's participation in the surveillance process to the point where the alternate system believed that a failure on the active system had occurred.

UOW
See unit of work.

UOW table
See unit-of-work table.

upcall
In a Tivoli environment, a method invocation from an endpoint up to the gateway. ant: downcall See also downcall.

updatability
The ability of a cursor to perform positioned updates and deletes. The updatability of a cursor can be influenced by the SELECT statement and the cursor sensitivity option that is specified on the DECLARE CURSOR statement.

updatable result set
A result set that is associated with a cursor that was created with a SELECT statement that contains the FOR UPDATE clause.

update
(1) To modify a file or data set with current information.
(2) In a DB2 Data Links Manager environment, to modify a linked file.

update-anywhere replication
In SQL replication, a configuration in which all tables are both registered sources and read-write targets. One table is the primary source table for full refresh of all the others. See also replica table, master table, multi-tier replication, peer-to-peer replication.

update authority
A data authority that allows the user to change the data in an object, such as a journal, a message queue, or a data area.

update file
In RPG, a file from which a program reads a record, changes data fields in the record, and writes the record back to the location from which it came.

update hole
A row for a SELECT statement of a cursor that no longer has a corresponding row in the base table because the row was updated. An update hole is created when a row in the base table is updated such that the row no longer qualifies to be in the result set while a cursor is open whose SELECT statement result contains the row that is updated. Such a row is no longer accessible though the cursor. See also delete hole.

update-in-place
In a DB2 Data Links Manager environment, the process of making changes to a linked file while a DATALINK column value in a database is pointing to that file. Any changes to linked files during an update-in-place operation become visible to database users when the DB2 host is notified that the update is complete.

update-in-progress state
The logical state of a file under the control of a DB2 Data Links Manager that is in the process of being updated. A linked file enters this state after it is opened using a write token, and is no longer in this state when the DB2 host is notified that the update is complete.

update intent
In IMS, DL/I, or SQL/DS, the type of access intent that allows a subsystem to insert, delete, or replace records on a database.

update lock
A lock that limits concurrently executing application processes to read-only operations on the data if these processes have not declared that they might update the row. See also exclusive lock, gross lock, shared lock.

update operation
An I/O process that changes the data in a record.

update rule
A condition enforced by the database manager that must be met before a column can be updated.

update trigger
(1) In DB2 Universal Database for z/OS and OS/390, a trigger that is activated when an update operation occurs on the base table of the trigger definition. See also trigger activation.
(2) A trigger that is defined with the triggering SQL operation UPDATE.

upgrade
(1) Any hardware or software change to a later release, or any hardware addition or software addition.
(2) To add or replace hardware or software with newer models or releases.

upline
Pertaining to controllers that are above devices, and lines that are above controllers in a communications configuration. See also downline.

upload
To transmit data from a computer to a central computer or network, or to an attached device such as a printer.

up-sell
A product recommendation of a related yet pricier product in the same product line as the currently displayed or selected product. Effective up-sell and cross-sell techniques drive sales by presenting products complementary to initial purchases or invite customers to purchase more expensive items than the original selection in the same product category. See also cross-sell, accessory.

upstream
(1) Pertaining to the direction opposite to data flow, which is toward the source of a transmission. See also downstream.
(2) Pertaining to the direction of the flow, which is from the start of the process (upstream) toward the end of the process (downstream).
(3) In DB2 Universal Database for z/OS and OS/390, the node in the syncpoint tree that is responsible, in addition to other recovery or resource managers, for initiating the execution of a two-phase commit.

UR
See uncommitted read.

URC
See unit reference code.

URD
See unit of recovery descriptor.

URI
See Uniform Resource Identifier.

URID
See unit of recovery ID.

URL
(1) See Uniform Resource Locator.
(2) See user route list.

URL scheme
A format that contains another object reference.

URN
See Uniform Resource Name.

usable
In cross-site mirroring, pertaining to the mirror copy data state that indicates that the correct order of updates to the mirror copy from the production copy is being preserved, but the mirror copy may be outdated. The usable mirror copy data state occurs (a) when the system performs geographic mirroring in synchronous mode, (b) after successfully suspending geographic mirroring, and (c) when the mirror copy is successfully detached.

usage
In the Reusable Asset Specification (RAS), a collection of artifacts describing the core extension points and techniques for using an asset. This section of an asset provides key insights to making the asset approachable and consumable.

usage statement
In a privacy management environment, a logical statement that identifies how personally identifiable information (PII) can be used. A statement identifies PII types, the groups that can access the PII types, the purposes for which the PII types can be used, and conditions that might apply to the use of the PII. For example, a privacy policy might include the following usage statement: "Doctors (group) can access medical records (PII type) for diagnosis and treatment (purpose)." See also condition rule.

usage type
In OS/400, a license management function that monitors usage by tracking the number of license users. Concurrent usage type indicates the usage limit is for the number of unique jobs using the product at the same time. Registered usage type indicates the usage limit is for the number of unique license users registered to use the product.

USB
See Universal Serial Bus.

use authority
An object authority that allows the user to run a program or to display the contents of a file. Use authority combines object operational authority, read authority, and execute authority.

use case
(1) A technique for identifying user requirement by providing scenarios that illustrate how a user and a system interact. In WebSphere Commerce, a use case shows the flow of each user interaction in the starter store and acts as a template for creating a store.
(2) The specification of a sequence of actions, including variants, that a system (or other entity) can perform, interacting with actors of the system. See also scenario.
(3) A description of a set of sequences of actions, including variants, that a system performs to yield an observable result of value to an actor. See also include relationship, scenario.

use-case diagram
A diagram that shows the relationships among actors and use cases within a system.

use-case realization
A construct that describes how a particular use case is realized within the design model, in terms of collaborating objects.

use count
Number of tasks using a program concurrently. This is maintained by CICS in the program processing table.

user
(1) A person who requires the services of Content Manager. This term generally refers to users of client applications, rather than the developers of applications, who use the Content Manager APIs.
(2) Someone who uses DirectTalk as a system administrator, application developer, or similar. See also caller.
(3) Any person, organization, process, device, program, protocol, or system that uses the services of a computing system.
(4) In the Information Catalog Center, a person who accesses the information available in the information catalog but who is not an administrator. Some users can also perform object management tasks normally performed by administrators, such as creating and updating objects. See also administrator, administrator.

user activity keypoint
A keypoint written to the system log by a user transaction. See also activity keypoint.

user agent (UA)
In OSI X.400, one of two basic parts of electronic mail. A user agent is a program that provides access to the mail system. This program allows users to compose, send, and receive mail.

user ASP
(1) One or more auxiliary storage pools used to isolate journals, journal receivers, and save files from the other system objects stored in the system ASP. See also system ASP, auxiliary storage pool.
(2) One or more storage units used to isolate some objects from the other objects that are stored in the system ASP and other user ASPs. User ASPs are defined by the user.

user assistance
Online information that accompanies a product and provides immediate information to assist the user in completing tasks. It can include help files, messages, screen text, images, or other reference information.

user authentication
In RACF, part of security checking at signon. It consists of identification of the user IDand verification of the password or of the user identification card.

user bag
In the MQAI, a type of data bag that is created by the user.

user-based pricing
A pricing option that provides the capability for the customer to pay for the licensed program on the basis of the number of users.

user class
The classification of a user by the system task, such as security officer, security administrator, programmer, system operator, and user. Each user class has a set of special authorities depending on the security level of the system. The user class determines which options are shown on the IBM-supplied menus.

user configuration
In iSeries Access, the set of files, created by the iSeries Access administrator, that define the user's iSeries Access configuration and the functions used. The files include the configuration file and the command file.

user-controlled environment
An extended program model (EPM) environment that is explicitly created using the QPXXCALL program.

user copy table
In SQL replication, a replication target table whose content matches all or part of a registered source table and contains only user data columns.

user-created data stream
A data stream that has not been validated by a system program on the system when the data was spooled.

User Datagram Protocol ( UDP UDP)
In the Internet suite of protocols, a protocol that provides unreliable, connectionless datagram service. It enables an application program on one machine or process to send a datagram to an application program on another machine or process.

user data set
In MVS, a data set defined to RACF in which either the high-level qualifier of the data set name or the qualifier supplied by an installation exit routine is a RACF userid. See also group data set.

user-defined character (UDC)
A character that is created through the Character Generator Utility (CGU). CGU is an extension of the code page with special user-defined ideographic characters, symbols, or logos. User-defined characters may be present in some of the Japanese, Chinese, and Korean code pages.

user-defined collating sequence
In Query, a collating sequence defined by the user that replaces the EBCDIC collating sequence provided by the system for sorting fields in a query report.

user-defined communications support
An Operating System/400 function that provides an application program interface (API). User-defined communications support allows user-written application programs to call routines to set up and use a communications protocol over a token-ring, Ethernet, or X.25 network.

user-defined data stream (UDDS)
A data stream in which the user has defined and embedded all device control characters.

user-defined edit code
A number (5 through 9) indicating that editing should be done on a numeric output field according to a pattern predefined to the system program. User-defined edit codes can take the place of edit words, so that repetitive coding of the same edit word is not necessary.

user-defined event
An event defined by the BTS application programmer. The BTS user-defined events are activity completion events, input events, and timer events. See also composite event, system event, timer event.

user-defined function ( UDF UDF)
(1) A function that is defined to DB2 by using the CREATE FUNCTION statement and that can be referenced thereafter in SQL statements. A user-defined function can be an external function, or an SQL function. See also built-in function, sourced function, database function.
(2) A database object that is created with the CREATE FUNCTION statement. All functions that are not built-in functions are user-defined functions. See also built-in function.

user-defined node
An extension to the broker that provides a new message flow node in addition to those supplied with the product. See also callback function, utility function.

user-defined parser
An extension to the broker that provides a new message parser in addition to those supplied with the product. See also callback function, utility function.

user-defined performance variable
A performance variable created by a user and added to the performance variable profile.

user-defined program
A program that a user supplies and defines to the Data Warehouse Center, as contrasted with supplied programs, which are included with and defined automatically in the Data Warehouse Center. UDB Data Warehouse Center

user-defined structured type
See structured type.

user-defined type ( UDT UDT)
(1) A data type that is not native to the database manager and was created by a user. In DB2 Universal Database, the term distinct type is used instead of user-defined type.
(2) A mechanism that can be used to create new data types. A UDT can extend the capabilities of the built-in data types and capture the unique semantics of user data.

user-defined word
In COBOL, a word, required by a clause or a statement, that must be supplied by the user in a clause or statement.

user domain
A CICS domain responsible for identifying users and recording their non-security attributes.

user domain object
An object on the system that can be accessed directly by a user state program. The object types that can be either system domain or user domain are: *USRSPC, *USRIDX, *USRQ, *PGM, *SQLPKG. All other object types are system domain. See also domain.

user dynamic storage area (UDSA)
A storage area in CICS Transaction Server 3.3 allocated below the 16MB line and reserved exclusively for those user application programs that execute in user-key and that reside below the 16MB line.

user entry procedure (UEP)
The entry procedure, written by the application programmer, that is the target of a dynamic program call. This procedure gets control from the program entry procedure (PEP). See also program entry procedure.

user exit
(1) A point in a program at which a user exit routine may be given control.
(2) In Backup Recovery and Media Services, a special operation (*EXIT) available in the control group to permit automatic processing of predefined user routines during control group processing.

user exit handler
A CICS program that is invoked at an exit point (other than an exit point in a domain) to handle the user exit program associated with that exit point. For programming information, see the CICS Transaction Server Customization Guide.

user exit program
A program, written by a user, that receives control at predefined user exit points. When a user exit program is invoked, the database manager passes control to the executable file. Only one user exit program can be invoked in a database manager instance.

user exit programming interface (XPI)
A CICS interface that provides global user exit programs with access to some CICS services. XPI consists of a set of function calls that you can use in your user exit programs to extend or modify CICS system functions. For programming information, see the CICS Transaction Server Customization Guide.

user exit routine
A user-written routine that receives control at predefined user exit points.

user experience time
The time it takes to complete a single HTTP transaction.

user file
A file containing information about all MERVA ESA users; for example, which functions each user is allowed to access. The user file is encrypted and can only be accessed by authorized persons.

user group
(1) A collection of users that enroll with a portal.
(2) A group consisting of one or more defined individual users, identified by a single group name.
(3) See customer group. See also site administrator.

user ID
(1) See user identifier.
(2) See user identification.

user ID/address
The two-part network name used in the system distribution directory and in the office applications to uniquely identify a user and send electronic mail.

user identification ( user ID UID, user ID)
(1) In Notes/Domino, a file assigned to every user and server that uniquely identifies them to Lotus Notes and Domino.
(2) In the UNIX operating system, a string that uniquely identifies each user to the operating system.
(3) The name used to associate the user profile with a user when a user signs on to a system.
(4) The first part of a two-part network name used in the system distribution directory and in the office applications to uniquely identify a user. The network name is usually the same as the user profile name, but does not need to be. See also common user identification.

user identification and verification
The acts of identifying and verifying a RACF-defined user to the system during logon or batch job processing. RACF identifies the user by the user ID and verifies the user by the password or operator identification card supplied during logon processing or the password supplied on a batch JOB statement.

user identification number (uid)
A 4-byte, unsigned integer (uid) used to identify a user profile. See also group identification number.

user identifier (user ID)
(1) In a privacy management environment, a user key that the PII owner is likely to know the value of. See also user key.
(2) A string of characters that uniquely identifies a user to a system.

user index
In OS/400 application programming interfaces, an object that provides a specific order for byte data according to the value of the data. User index objects reside in the user domain. The system-recognized identifier for the object type is *USRIDX.

user information
Information specific to a user, such as a user name, password, and e-mail address.

user interface
(1) Any of the actions or items that allow a user to interact with and perform operations on a computer.
(2) Any control mechanisms including graphical displays; components such as buttons or dials; or operating system commands, provided by a machine or program to allow the user to communicate with and use the machine or program. Definition adapted from whatis.com

user interface block (UIB)
A control block used in the CALL DLI interface to pass information to the user program. It contains the address of the PCB address list (UIBPCBAL) from the schedule request, and the response code to each DL/I request. A definition of the UIB should only be included in the application program if the UIB is to be referenced. The UIB is acquired by the interface routine when an application program issues a schedule request specifying a pointer reference to be set with the address of the UIB.

user interface manager (UIM)
A function of the operating system that provides a consistent user interface by providing comprehensive support for defining and running panels (displays), dialogs, and online help information.

user item
In the MQAI, a type of data item that is created by the user.

user key
In a privacy management environment, a storage location, with a value that might or might not be known by the PII owner, that represents the identity of the PII owner of other PII-classified storage locations. See also storage location, user identifier.

user-key storage
Storage obtained by CICS in MVS open-key storage. It is for user application programs and their associated data areas. It can be accessed and modified by user applications and by CICS. See also CICS-key.

user log
A log file on the host in which all user actions that change the contents of the host database (for example logging on or off, changing the priority of a payment, or starting or stopping a currency, channel, or payment) are recorded.

user login map
A variable user name that can be mapped to different users on different operating systems.

user-maintained data table (UMT)
A type of CICS data table that has no CICS-supported association with its source data set after it has been loaded. Changes to the table are not automatically reflected in the source data set.

user mapping
(1) In a federated system, the association between the authorization ID at the federated server and the authorization ID at the data source. User mappings are needed so that distributed requests can be sent to the data source. User mappings are created when a user's authorization ID to access the federated database differs from the user's authorization ID to access a data source. The CREATE USER MAPPING statement is used to define the association. The ALTER USER MAPPING statement is used to modify a user mapping that you have already created. See also user options.
(2) The association of Information Integrator for Content user IDs and passwords to corresponding user IDs and passwords in one or more content servers. User mapping enables single logon to Enterprise Information Portal and multiple content servers.

user message queue
A user-created object used to receive messages sent from the system, other users, and application programs.

user name
(1) A string of characters that uniquely identifies a user to a system. See also user identification.
(2) In Sametime, the name by which a user is seen by other users. This name is entered, along with a password, when the user logs onto the Sametime server.

User Name Server
A component that interfaces with operating system facilities to determine valid users and groups.

user name token
A type of token that is represented by a user name and optionally, by a password.

user options
In a federated system, parameters of the CREATE USER MAPPING and ALTER USER MAPPING statements to which values related to authorization are assigned. For example, suppose that a user has the same ID with different passwords for the federated database and a data source. For the user to access the data source, it is necessary to map the passwords to one another. This is accomplished with the user option REMOTE_PASSWORD. See also user mapping.

user password
A unique string of characters that a system user enters to identify that user to the system, if the system resources are secured.

user plane
In Tivoli NetView, the submap layer on which symbols of objects that are not managed by an application program are displayed. Symbols on the user plane are displayed with a shadow, which makes them appear higher than symbols on the application plane. See also background plane, application plane.

user profile
(1) In LearningSpace - Virtual Classroom, a collection of permissions that control access to the product's features and functionality.
(2) An object with a unique name that contains the user's password, the list of special authorities assigned to a user, and the objects the user owns. The system-recognized identifier for the object type is *USRPRF.
(3) In computer security, a description of a user that includes such information as user ID, user name, password, access authority, and other attributes that are obtained when the user logs on.
(4) In Lotus Learning Management System, a descriptive label an administrator creates and a user elects so that the user might be notified of potentially interesting courses.

user profile name
The name or code that the system associates with a user when the user signs on the system.

user queue
In OS/400 application programming interfaces, an object consisting of a list of messages that communicate information to other application programs. The system-recognized identifier for the object type is *USRQ.

user registration properties file
A file on the WebSphere Commerce Server that contains information needed to support the correct language and country or region for a store.

user registry
(1) A database of known users and user-provided information that is used for authentication purposes.
(2) A collection of user information, such as user IDs and passwords, that is used as the basis for security control by a system such as a Web application server.

user-related activity
An activity that requires human involvement. Such an activity cannot be started automatically by BTS, because it is dependent on a user being ready to process the work.

user-replaceable program
A CICS program that is invoked at a particular point in CICS processing as if it were part of CICS code. You can modify the supplied program by including your own logic, or replace it with a version that you write yourself. Examples include the dynamic routing program, and the transaction restart program.

user resource
Java classes (.class), Java archive (.jar), and resource (.hrf, or XML) files that reference user data contained in an external data store. A user resource is a specific type of content resource. User resources are not generally content managed.

user role
See authorization role.

user route list (URL)
A list of terminals to which a routed message is to be sent by BMS. Each entry in the list contains the terminal identification, any necessary logical device code or operator identification, and a status flag.

user security
That part of a security facility that verifies that a user is authorized to (a) sign on to a local or remote system (b) run a transaction and (c) to access the resources and use the commands that a transaction invokes. See also bind-time security.

user selector
In the WebSphere MQ Administration Interface (MQAI), the identifier that is placed with a data item into a data bag to identify the data item. WebSphere MQ provides predefined user selectors for WebSphere MQ objects.

user session
Any APPC session other than a SNASVCMG session.

users group
A security group that can, by default, read documents and requirements, create views, and participate in discussions. Administrators can modify Users group permissions.

user shell
An interactive shell. The user's CICS application program runs directly under this CICS facility.

user space
In OS/400 application programming interfaces, an object consisting of a collection of bytes that can be used for storing any user-defined information. The system-recognized identifier for the object type is *USRSPC.

user state program
A program that can access objects in the user domain. All user programs on the system are user domain. A user state program can call only another user state program.

user-supplied route list entry
An entry that defines the terminals or operators to which a BMS logical message is to be routed.

user table
(1) In SQL replication, a table created for and used by an application before it is defined as a replication source. A user table is used as the source for updates to read-only target tables, consistent-change-data tables, replicas, and row-replica tables.
(2) A list of user IDs authorized to an iSeries finance job.

user time
In UNIX, the time spent executing database manager code. See also system time.

user transaction
A user-written transaction.

user transaction abend code
An abend code issued by a user program or by an IBM licensed program other than CICS.

user view
In logical data modeling, a model or representation of critical information that the business requires.

uses relationship
In Unified Modeling Language (UML), a dependency in which one element (the client) requires the presence of another element (the supplier) for its correct functioning or implementation.

USS
See unformatted system service.

UTC
(1) See coordinated universal time.
(2) See Universal Time Coordinated.

UTF
See Unicode Transformation Format.

UTF-16
Unicode Transformation Format, 16-bit encoding form, which is designed to provide code values for over a million characters and is a superset of UCS-2. The CCSID value for data in UTF-16 format is 1200. DB2 Universal Database for z/OS and OS/390 supports UTF-16 in graphic data fields.

UTF-8
Unicode Transformation Format, 8-bit encoding form, which is designed for ease of use with existing ASCII-based systems. The CCSID value for data in UTF-8 format is 1208. DB2 Universal Database for z/OS and OS/390 supports UTF-8 in mixed data fields. See The Unicode Standard Version 3.0.

utility
(1) In WebSphere MQ, a supplied set of programs that provide the system operator or system administrator with facilities in addition to those provided by the WebSphere MQ commands.
(2) A stereotype that groups global variables and procedures in the form of a class declaration. The utility attributes and operations become global variables and global procedures, respectively. A utility is not a fundamental modeling construct, but a programming convenience.

utility function
A function provided by the broker that can be used by developers who write user-defined nodes or parsers. See also user-defined node, user-defined parser.

utility server
A Content Manager component that is used by the database utilities for scheduling purposes. You configure a utility server when you configure a resource manager or library server. There is one utility server for each resource manager and each library server.

UTOKEN
The RACF security token that encapsulates or represents the security characteristics of a user. RACF assigns a UTOKEN to each user in the system.

utterance
A spoken word, phrase, or sentence that can be preceded and followed by silence.

UUID
See universally unique identifier.

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