 |
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
#
Please send any feedback about the terms and definitions on this site to terms@ca.ibm.com |
|
|
|
-
T1
- A digital trunking facility standard
used in the United States and elsewhere, capable of transmitting and receiving
24 digitized voice or data channels. Signaling can be imbedded in the voice
channel transmission when robbed-bit signaling is used. The transmission rate
is 1544 kilobits per second. See also E1.
-
T1/D3
- A framing format used in T1
transmission.
-
T1/D4
- A framing format used in T1
transmission.
-
tabbable element
- In Web page creation,
a page element that can be reached using the tab key.
-
tab character
- A character that indicates
that printing or displaying should start at the next horizontal position on
the current line. The tab is designated by '\t' in the C language and is named
in the portable character set.
-
tab index
- In Web page creation, an
attribute that allows the directed use of tab stops to change the default
navigation through a page.
-
table
- (1) In a relational database, a
database object that consists of a specific number of columns and is used
to store an unordered set of rows. See also base table, temporary table, view.
- (2) An orderly arrangement of data in rows and columns that
can contain numbers, text, or a combination of both.
- (3) In COBOL,
a set of logically consecutive data items that are defined in the Data Division
with the OCCURS clause.
- (4) In RPG, a series of elements with like
characteristics. A table can be searched for a uniquely identified element,
but elements in a table cannot be accessed by their position relative to other
elements.
-
table analysis
- An analysis process
that consists of primary key analysis and the assessment of multicolumn primary
keys and potential duplicate values.
-
table builder services message (TBSM)
- A message issued by a table builder module.
-
table check constraint
- See check constraint.
-
table collocation
- In a partitioned
database environment, a state that occurs when two tables that have the same
number of compatible partitioning keys are stored in the same database partition
group. When this happens, the DB2 database management system can perform the
join or subquery processing at the database partition where the data is stored.
-
table-controlled partitioning
- A type
of partitioning in which partition boundaries for a partitioned table are
controlled by values that are defined in the CREATE TABLE statement.
-
table designator
- An exposed name
used to qualify a column name. See also exposed name.
-
table element
- In COBOL, a data item
that can be referred to in a table.
-
table expression
- An expression that
creates a temporary result table from a query. For example, a table expression
might be a query that selects all of the managers from several departments
and further specifies that they have over 15 years of working experience and
are located at the main branch.
-
table file
- In RPG, an input file
that contains a table.
-
table function
- A function that receives
a set of arguments and that returns a table to the SQL statement that references
the function. A table function can be referenced only in the FROM clause of
a subselect. See also function, user-defined function, routine.
-
table locator
- A mechanism that allows
access to trigger tables in SQL or from within user-defined functions. A table
locator is a fullword integer value that represents a transition table. See
also transition table.
-
table lock
- A lock on a table of data.
See also row identifier, row lock.
-
table-mode processing
- In SQL replication,
a type of replication subscription-set processing in which the Apply program
retrieves all of the data from the source CD table, applies the data (one
member at a time) to each target table, and finally commits its work. See
also transaction-mode processing.
-
table object ID
- Internal logical
identifier for a table. In DB2 Database for Linux, UNIX, and Windows, table
object IDs for each table in a database are stored in the TABLEID column of
the SYSCAT.TABLES catalog view.
-
table of contents (TOC)
- The list
of documents and folders that are contained in a folder or workbasket. Search
results are displayed as a folder table of contents.
-
table pair
- A set of tables used for
processing specifications: the JES2 table provides the default processing
specifications and the user table provides updates or deletions to the default
processing specifications. See also dynamic table, JES2 table, user table.
-
table partitioning
- A data organization
scheme in which table data is divided across multiple data partitions according
to values in one or more partitioning columns of the table. Data from a given
table is partitioned into multiple storage objects, which can be in different
table spaces, based on the specifications that are provided in the PARTITION
BY clause of the CREATE TABLE statement. See also data partition, database partitioning.
-
table-partitioning key
- An ordered
set of one or more columns whose values are used to determine in which data
partition each table row belongs. See also distribution
key.
-
table queue
- A mechanism for transferring
rows between database partitions. Table queues are distributed row streams
with simplified rules for the insertion and removal of rows. Table queues
can also be used to deliver rows between different processes in a single-partition
database.
-
table reference character (TRC)
- A numeric character corresponding to the order in which font character sets
have been specified. The TRC is used to select a font character set during
printing.
-
table space
- (1) A logical unit of storage
in a database. In DB2 for z/OS, a table space is a page set and can contain
one or more tables. In DB2 Database for Linux, UNIX, and Windows, a table
space is a collection of containers, and the data, index, long field, and
LOB portions of a table can be stored in the same table space or in separate
table spaces. See also page set, container.
- (2) A page set that is used to store the records in
one or more DB2 for z/OS tables. See also segmented
table space.
- (3) A logical unit of storage in a database.
-
table space container
- An allocation
of space to a table space. Depending on the table space type, the container
can be a directory, device, or file.
-
table space ID
- Internal logical identifier
for the primary table space for an object. In DB2 Database for Linux, UNIX,
and Windows, table space IDs for each table space in a database are stored
in the TBSPACEID column of the SYSCAT.TABLES catalog view.
-
table space set
- A set of table spaces
and partitions that should be recovered together because the tables contained
in the table spaces have dependencies on one another. The dependencies can,
for example, be between parent table and descendent table or between base
table and auxiliary table.
-
tab stop
- In VisualAge RPG, a control
setting that determines if a control can be selected by using the tab key.
-
tachometer
- A part that determines
speed of rotation.
-
TACLE
- See terminal abnormal condition line entry.
-
TACS
- See Total
Access Communication System.
-
TAE
- See text
analysis engine.
-
tag
- (1) The statements of the user interface
manager (UIM) tag language. Tags describe the actions, format, and data of
the panel. Tags are used to define the formatting of help information.
- (2) One or more characters attached to a set of data (for example, a field
or document element) that contain information about the set, including its
identification.
- (3) A text string attached to any instance of a word
in a grammar. A tag can be used to distinguish two occurrences of the same
word in a grammar, or to identify more than one word in a grammar as having
the same meaning.
- (4) In markup languages such as SGML, XML, and HTML,
a token representing the start or end of an element.
- (5) A type of
structured field used for indexing in an AFP document. Tags associate an index
attribute-value pair with a specific page or group of pages in a document.
- (6) A mechanism used to identify certain attributes having some bearing
on handling of character data. Some examples are character set identifier,
code page identifier, language identifier, country identifier, and encoding
scheme identifier.
- (7) In UN/EDIFACT EDI Standards, the segment identifier.
In export and import, a code that is assigned to each field in the database
and used to identify the field in the export file. Such export files are known
as tagged files.
- (8) A word or phrase that users create and assign
to an asset. Users create tags to develop search criteria that is meaningful
to themselves.
-
tag content
- The text associated with
a tag.
-
Tagged/Delimited String Format (TDS Format)
- The physical representation of a message in the MRM domain that has
a number of data elements separated by tags and delimiters.
-
Tagged Image File Format (TIFF)
- A file format for storing high-quality graphics.
-
tagged value
- The explicit definition
of a property as a name-value pair. In a tagged value, the name is referred
as the tag. Certain tags are predefined in the UML; others may be user defined.
Tagged values are one of three extensibility mechanisms in UML. See also constraint.
-
Tag Image File Format-Fax (TIFF-F)
- A graphic file format used to store and exchange scanned fax images.
-
taglib directive
- In a JSP page, a
declaration stating that the page uses custom tags, defines the tag library,
and specifies its tag prefixes. (Sun)
-
tag library
- In JSP technology, a
collection of tags identifying custom actions described using a taglib descriptor
and Java classes. A JSP tag library can be imported into any JSP file and
used with various scripting languages. (Sun)
-
TAI
- See trust
association interceptor.
-
tail
- In REXX, the part of a compound
symbol that follows the stem. A tail can consist of constant symbols, simple
symbols, and periods.
-
takeover
- In an XRF environment, the
process by which the failing active IMS is released from its XRF sessions
with terminal users and replaced by an alternate IMS.
-
takeover condition
- An event in the
active that causes IMS in the alternate to request a takeover.
-
takeover phase
- The replacement of
the failing active IMS by the alternate IMS.
-
takeover time
- In XRF, the elapsed
time between the occurrence of a failure, the completion of switching all
terminals to the alternate CICS system, and the running of the first user
transaction.
-
tampering
- A breach of communication
security in which information in transit is changed or replaced and then sent
on to the recipient. See also eavesdropping, impersonation.
-
tangent
- The single point at which
a straight line meets a curve or surface.
-
tap
- To use a stylus to interact with
a handheld device.
-
TAP
- See Telocator
Alphanumeric Protocol.
-
tape cartridge
- A case containing
a reel of magnetic tape that can be put into a tape unit without stringing
the tape between reels.
-
tape configuration database (TCDB)
- The set of tape library records and tape volume records that reside in integrated
catalog facility (ICF) volume catalogs and describe the current tape library
configuration.
-
tape controller
- A logic card located
in some tape units that controls input/output tape devices and synchronizes
their operation with the operation of the system as a whole.
-
tape device
- A collection of tape
units that share a model type and serial number, such as all the logical unit
numbers (LUNs) of a tape library. See also tape unit.
-
tape drive
- A device used to move
magnetic tapes, as well as to read and write information onto those tapes.
-
tape file
- A device file to support
a tape device.
-
tape label
- A tape record that identifies
a magnetic tape volume and the data sets on that volume.
-
tape librarian
- The person who manages
the tape library. This person is a specialized storage administrator.
-
tape library
- (1) A device that includes
a selection of cartridges in a common (secure) area within access of one or
more automated removable media (ARM).
- (2) A set of equipment and facilities
that support an installation's tape environment. The tape library can include
tape storage racks, a set of tape drives, and a set of related tape volumes
mounted on those drives. See also Automated Tape Library
Dataserver, system-managed tape library, manual tape library.
-
tape library data server
- An IBM hardware
device that maintains the tape inventory that is associated with a set of
tape drives. A tape library data server also manages the mounting, removal,
and storage of tapes.
-
tape mark
- A unique mark written on
the tape to distinguish file boundaries.
-
tape mount management
- The methodology
used to optimize tape usage in order to decrease the number of tape mounts
and increase the amount of data on each tape. This optimization is accomplished
by redirecting appropriate tape requests to disk and collecting the data in
larger amounts on tape soon after the applications are completed. This methodology
also reduces the time required to run the application.
-
tape reel
- A round device on which
magnetic tape is wound.
-
tape storage group
- A collection of
tape volumes that contain private user data. A volume becomes part of the
tape storage group when it is mounted to satisfy a scratch volume request
for the storage group, or when it is entered into one of the tape libraries
and assigned to the tape storage group by the cartridge entry process. The
volume is removed from the tape storage group when it is returned to scratch
after the data sets on it have expired. See also storage
group.
-
tape subsystem
- A magnetic tape subsystem
consisting of a controller and magnetic tape devices, which allows for the
storage of user data on tape cartridges. See also storage subsystem.
-
tape table of contents (TTOC)
- In
DFSMShsm, the record that describes a tape volume and the data sets (migrated
or backup versions) that reside on that tape.
-
tape unit
- (1) The physical enclosure
containing the tape drive.
- (2) A tape device or a robotics controller
that is visible over a storage network. A tape unit is a member of a single
storage network (of 1 - n fabrics), but can have 1 - n equivalent paths. See
also tape device.
-
tape volume
- The recording space on
a single tape cartridge or reel. See also shelf-resident
tape volume.
-
tape volume table of contents (TVTOC)
- Information about a tape data set that RACF stores in the TAPEVOL profile
for the volume on which the data set resides. The TVTOC includes the data
set name, data set sequence number, creation date, and an indicator as to
whether a discrete tape data set profile exists.
-
target
- (1) The program or system to which
a request for files or processing is sent.
- (2) In VisualAge RPG, a
part that receives a target event from a source part whenever the state of
the source part changes.
- (3) In SEU, a line command, such as B (Before)
or A (After), that specifies the destination for other line commands such
as C (Copy) or M (Move).
- (4) The destination for an action or operation.
- (5) A collection of logical units (LUs) that are directly addressable
on the network. The target corresponds to the server in a client-server model.
- (6) A storage device on a fibre-channel network.
- (7) In distributed
data management (DDM), the platform that fulfills a request for remote data.
A target is also known as a server. See also Distributed
FileManager, source.
- (8) A Small Computer
System Interface (SCSI) device that acts as a subordinate to an initiator
and consists of a set of one or more logical units (LUs), each with an assigned
logical unit number (LUN). The LUs on the target are typically I/O devices.
A SCSI target is analogous to an S/390 control unit; a SCSI initiator is analogous
to an S/390 channel; and a SCSI LU is analogous to an S/390 device. See also
Small Computer System Interface, initiator.
- (9) A value that a Key Performance Indicator (KPI)
should achieve, such as "300" or "5 days."
-
TARGET
- See Trans-European Automated Real-Time Gross Settlement Express Transfer.
-
targetable command
- A command that
can be executed on a different target container. A targetable command invocation
incurs some overhead; making the task command not targetable can improve the
performance of the overall command framework.
-
target based map
- A map based on the
order elements that are defined in the target document definition.
-
target catalog entry
- A promotional
product or SKU that is defined as a merchandising association. See also source catalog entry.
-
target CDD
- A customization definition
document (CDD) to which placeholders have been added, and for which placeholder
values have been specified. A target CDD describes a particular target customization
definition.
-
target CI
- A configuration item (CI)
that is expected to be affected by a change or a release. A target CI is defined
when a request for change (RFC) is created, when an implementation or software
distribution task is defined, and during define targets tasks that can occur
throughout a process.
-
target component
- A component that
is the final target of a client service request.
-
target customization definition
- A customization definition that describes a changed version of a current customization
definition. Each target customization definition has a target CDD that describes
it.
-
target data queue program
- In System
i Access, a series of programs that receive requests for data manipulation
from the source data queue program. Target data queue programs also send data
and replies (to previous requests) to the source data queue program.
-
target directory
- In VisualAge RPG,
the directory in which the compiled VRPG application is stored.
-
target distributed data manager (TDDM)
- In a distributed data management network, programming support that translates
the DDM requests received from a source system into data management or SQL
requests on the target (or remote) system. See also source distributed data manager.
-
target document
- A translated version
of a document.
-
target document definition
- A description
of the document layout used to create an output document from a translation.
-
target document definition window
- One of the pages on the Details tab of the Data Transformation Map Editor
and the Functional Acknowledgement Map Editor. It displays the target document
definition.
-
targeted e-mail
- A means of communicating
a campaign through e-mail to specific recipients based on customer profiling.
-
target event
- In VisualAge RPG, an
event that a target part receives whenever the state of a source part changes.
-
target filter
- A filter that is defined
for each capability set and is based on the attributes defined for a target
instance.
-
target folder
- In VisualAge RPG, the
folder where the application (composite project) will be created.
-
target host
- See task endpoint.
-
target library (TLIB)
- A data set
that contains all or part of a product after it is installed from a distribution
library.
-
target library high-level qualifier (thlqual)
- A high-level qualifier for z/OS target data set names.
-
target logical partition
- In logical
partition (LPAR) mode, the current or immediate LPAR being used or displayed.
-
target namespace
- A unique logical
location for information about the service that associates a namespace with
a WSDL location.
-
target program
- (1) In communications,
the program that is started on the remote system at the request of the source
system. See also source program.
- (2) In
display station pass-through, a program that runs on the remote system.
- (3) In VisualAge RPG, the object to be built by the project, such as a Dynamic
Link Library (DLL).
-
target queue manager
- See remote queue manager.
-
target recovery time
- The amount of
time estimated by the system that it will need to recover access paths during
an initial program load (IPL) after an abnormal system end. Actual performance
may range around the target.
-
target region
- In BTS, the CICS region
on which a routed process or activity executes. See also requesting region, routing region.
-
target release
- (1) The release of the
operating system on which a user intends to use an object being created, or
intends to restore or use an existing object. See also source release.
- (2) In upgrades, the version, release, and modification
level of software that is to be installed.
-
target segment
- In secondary indexing,
the segment to be retrieved.
-
target server
- (1) A database that contains
replication target tables.
- (2) In upgrades, the planned hardware configuration
and software level that exists when the upgrade is completed.
- (3) In Q replication and SQL replication, a database or subsystem that contains
replication target tables or procedures.
-
target service
- A service that exists
outside of the gateway.
-
target system
- (1) The system that receives
a request from another system. See also source system.
- (2) In upgrades, the planned hardware configuration and software
level which will exist when the upgrade is completed.
- (3) A managed
system on which an IBM Director task is performed.
-
target table
- (1) In SQL replication,
a table that is the destination for changes from a registered replication
source. A target table can be a user copy table, a point-in-time table, a
base aggregate table, a change aggregate table, a CCD table, or a replica
table. See also Apply program, source table, replication target.
- (2) In Q replication, a table that is the destination for replicated changes from
a source that is part of a Q subscription.
-
target workstation
- A system identified
for a Common Inventory Technology (CIT) installation.
-
target zone
- In the System Modification
Program/Extended (SMP/E), a collection of VSAM records describing the target
system macros, modules, assemblies, load modules, source modules, and libraries
copied from distribution libraries (DLIBs) during system generation, and the
system modifications (SYSMODs) applied to the target system.
-
tariff
- The fee the packet-switching
data network charges a user for sending data. The tariff is usually based
on the number of packets sent over the network.
-
task
- (1) In the Task Center, a unit of
work and its associated schedule and task actions. A task can be set to run
on a schedule and can perform various actions based on the success or failure
of the task. DB2 scripts, operating system scripts, and warehouse steps are
all examples of tasks. See also step, task action.
- (2) A process and the procedures that run the process.
- (3) A unit of work to be accomplished by a device or process.
- (4) An activity that has business value, is initiated by a user, and is
performed by software.
- (5) In a Tivoli environment, the definition
of an action that must be routinely performed on various managed resources
throughout the network. A task defines the executables to be run; the authorization
role required to execute the task; and the user or group name under which
the task will execute.
- (6) In CICS, a single instance of the execution
of a transaction.
- (7) A unit of work representing one of the steps
in a process.
- (8) The basic building blocks in the model. Each task
performs some function. Visually, a task represents the lowest level of work
that can be portrayed in a process.
- (9) In Tivoli Intelligent Orchestrator,
an action that runs a deployment job on one or more target devices. A deployment
job can include one or more job items that correspond to workflows.
- (10) The smallest unit of work in a workspace that can be assigned to one
Content Contributor. See also workspace, task group, workspace content contributor.
- (11) A scheduled project activity to which one or more resources can be assigned.
- (12) A work item that an administrator performs, for example: granting
permissions and adding users to a community.
- (13) An action performed
by the provisioning server on a host. Examples of tasks are deployment, creating
cloning profiles, and detecting the currently installed operating system.
-
task action
- In the Task Center, an
action that is performed based on the completion status of a particular task.
For example, "If Task A completes successfully, run Task B" and "If Task Z
fails, disable the schedule of Task Y," both "run Task B" and "disable the
schedule of Task Y" are task actions. See also step, task.
-
task category
- A string that is associated
with any number of tasks in the Task Center for easier administration of related
tasks. For example, a user can create a task category named "Payroll," then
group all of the payroll-related tasks in that category.
-
Task Center
- In the DB2 database management
system, the graphical interface for organizing task flow, scheduling tasks,
and distributing notifications about the status of completed tasks.
-
task command
- A command that implements
a specific application logic. In general, a controller command and a set of
task commands together implement the application logic for a URL request.
See also controller command.
-
task control area (TCA)
- An area of
main storage acquired by CICS when a task is first dispatched. It is used
to control the processing of the task. Once acquired, the TCA exists until
the task is terminated. It contains the current status of the task, its relative
dispatching priority, and parameters and information being passed between
CICS and the application program. During execution of the task, the user can
change the priority through task control services; further processing of the
task is scheduled accordingly.
-
task control block (TCB)
- A z/OS control
block that is used to communicate information about tasks within an address
space that is connected to a subsystem. See also address
space connection.
-
task driver
- The function that interacts
with the appropriate Tivoli software to perform a task. Also, if the respective
task has a user interface, the task driver provides that interface.
-
task dump
- A copy from memory of a
program that failed along with its associated data.
-
task endpoint
- In a Tivoli environment,
the agent that is the ultimate recipient for any type of Tivoli operation.
-
task global table (TGT)
- table containing
information about addresses, the length of working storage, and the program
start address.
-
task group
- The smallest unit of work
in a workspace that can be committed to production-ready data. See also workspace, task, commit, production-ready data, workspace manager, workspace task group approver, quick publish.
-
task library
- (1) In a Tivoli environment,
a container in which a Tivoli administrator can create and store tasks and
jobs.
- (2) A class library that provides the facilities to write programs
that consist of tasks.
-
Task Library Language (TLL)
- In a
Tivoli environment, a programming language used to define a task library.
The TLL definition can be used to copy a task library from one installation
to another. The TLL also allows the arguments for each task to be described
such that graphical user interface tools can interpret them and present an
interface for operators who want to create the tasks.
-
task manager
- In the Windows operating
system, the function that controls the starting and stopping of programs.
-
taskpad
- In System i Navigator, a
view of system tasks that lets a user interact with i5/OS operating system
functions. A taskpad contains a set of interrelated tasks that either perform
a function or launch help that explains how to perform a function.
-
task-related user exit (TRUE)
- A user
exit program that is associated with specified events in a particular task,
rather than with every occurrence of a particular event in CICS processing
(as is the case with global user exits). See also global user exit, resource manager interface.
-
task status
- Indication of the state
of completion of a task and whether any errors occurred when the task was
running.
-
task swapper
- A function, introduced
with DOS 5.00, that allows the user to switch from one application to another
without ending either application. With the task swapper function, only one
application is active at any time. The active program is the application that
is currently running; all other applications are suspended until the user
switches to that application.
-
task switching
- The overlapping of
I/O operations and processing between several tasks.
-
task template
- A group of elements
which can be customized on a host computer. They are either deployment parameters
or graphical user interface elements which condition the appearance of the
target computer screen when Tivoli Provisioning Manager for OS Deployment
is managing the computer. See also deployment scheme.
-
tax category
- Indicates the different
categories of tax a store may be required to collect, such as federal, state
or provincial, and municipal tax. Each tax category must be assigned one of
the tax types; either sales or shipping.
-
taxonomy
- (1) A dictionary that enables
users to search for synonyms of their query terms when they search a collection.
See also category tree.
- (2) The hierarchical
classification of information according to a known system that is used to
easily discuss, analyze, or retrieve that information.
-
tax type
- Indicates the type of tax;
either sales or shipping. Each tax type has its own unique set of tax categories.
-
Tb
- See terabit.
-
TB
- See terabyte.
-
TBSM
- See table
builder services message.
-
TC
- See test
control.
-
TCA
- See task
control area.
-
TCAM
- See Telecommunications
Access Method.
-
TCAP
- See transaction
capabilities application part.
-
TCB
- (1) See task
control block.
- (2) See Trusted Computing
Base.
- (3) See transmission control block.
-
TCDB
- See tape
configuration database.
-
TCDBplex
- A group of one or more systems
or sysplexes, or both, that share the same tape configuration database (TCDB).
The individual systems in the TCDBplex share access to one or more tape library
data servers and to a common pool of scratch volumes in each tape library.
They can also share access to the set of private volumes in each tape library.
-
tc driver
- See automation package.
-
TCO
- See total
cost of ownership.
-
TCP
- See Transmission
Control Protocol.
-
TCP62
- SNA logical unit type 62 (LU62)
protocol encapsulated in TCP/IP. This allows APPC applications to communicate
over a TCP/IP Network without changes to the applications.
-
TCP ACK storm
- A denial-of-service
attack on a server in which a hacker or cracker secretly inserts data into
a client/server session in an attempt to disrupt the session. The resulting
acknowledgements (ACKs) bounce back and forth and a TCP ACK storm ensues after
the hacker has hijacked multiple client/server sessions.
-
TCP channel
- A type of channel within
a transport chain that provides client applications with persistent connections
within a local area network (LAN).
-
TCPI
- See to
complete performance index.
-
TCP/IP
- See Transmission Control Protocol/Internet Protocol.
-
TCP/IP-attached
- In PSF, pertaining
to a device that is linked to the OS/390 system through a TCP/IP network and
receives data from the OS/390 system using the application-layer IBM protocol
for IPDS printers. Some TCP/IP-attached printers require the i-data 7913 IPDS
Printer LAN Attachment. See also SNA-attached.
-
TCP/IP Connectivity Utilities
- The
IBM licensed program that provides a collective set of industrial communications
protocols to support connectivity functions for both local and wide area networks.
-
TCP/IP load balancing
- The ability
to distribute TCP/IP connections across target servers.
-
TCP/IP monitoring server
- A runtime
environment that monitors all requests and responses between a Web browser
and an application server, as well as TCP/IP activity.
-
TCP/IP port
- A 2-byte value that identifies
a TCP/IP network application within a TCP/IP host.
-
TCP/IP stack
- The layered suite of
protocols that comprise TCP/IP.
-
TCS
- See terminal
control system.
-
tcsh
- See Tenex
C shell.
-
TCT
- See terminal
control table.
-
TCTE
- See terminal
control table terminal entry.
-
TCTLE
- See terminal control table line entry.
-
TCTSE
- See terminal control table system entry.
-
TCTTE
- See terminal control table terminal entry.
-
TCTUA
- See terminal control table user area.
-
TCU
- See transmission
control unit.
-
TD
- (1) See transient
data.
- (2) See intrapartition transient data.
-
TDCC
- See Transportation Data Coordinating Committee.
-
TDD
- See Telecommunications
Device for the Deaf.
-
TDDM
- See target
distributed data manager.
-
TDF
- See time
differential factor.
-
TDLC
- See twinaxial
data link control.
-
TDMA
- See Time
Division Multiple Access.
-
TDS Format
- See Tagged/Delimited String Format.
-
TDT
- See transaction
dump table.
-
TE
- See terminal
equipment.
-
TE1
- See terminal
equipment 1.
-
TE2
- See terminal
equipment 2.
-
TEAC
- See time
variance at completion.
-
team development
- The practice of
several members of a team contributing to a single project, with the potential
for multiple team members to work in parallel on the same files.
-
teaming
- The grouping of two to four
ports or adapters to increase transmission and reception throughput. Teaming
creates a single, high-speed, fault-tolerant link that provides load balancing
for both outbound and inbound traffic. See also adapter
load balancing.
-
team support
- The component that interacts
with a repository to share and version projects and project data. See also
version control.
-
TEB
- See terminal
error block.
-
technical authority
- The member of
a project team who is authorized to decide whether and how to implement a
change request. The technical authority defines change tasks, and estimates
the effort of engineering the work tasks, corresponding to a change request.
-
technical information exchange (TIE)
- A part of the electronic customer support function that allows a user to send
files to and receive files from a remote support system, and to search for
information on a remote support system. The files are sent and received through
a remote support network.
-
technology adapter
- An adapter that
is designed for interactions that conform to a specific technology. The WebSphere
Adapter for FTP, for example, can be an intermediary through which an integration
broker sends data to a file system residing on a local or remote FTP server.
-
technology-independent machine interface (TIMI)
- The lowest visible architectural layer of the server. TIMI defines
the high-level machine instruction set and application programming interface
that is independent of the underlying implementation. This allows the underlying
hardware and Licensed Internal Code to evolve over time to take advantage
of technology advances without affecting the user-level interface.
-
TEI
- See terminal
endpoint identifier.
-
telecommunication
- The transmission
of data between computer systems over telecommunication lines and between
a computer system and remote devices.
-
telecommunication line
- The part of
a data circuit external to the equipment that connects to a data-switching
exchange.
-
telecommunication program PCB (TPPCB)
- The PCB that supports communication between an application program and
a terminal or other application program. There are two types of TP PCBs:
I/O PCB and alternate PCB.
-
Telecommunications Access Method (TCAM)
- An access method used to transfer data between main storage and remote
or local storage.
-
Telecommunications Device for the Deaf (TDD)
- A telephony device with a QWERTY keyboard and a small display
and, optionally, a printer.
-
Telecommunication Standardization Sector (ITU-T)
- Formerly known as the International Telegraph and Telephone Consultative
Committee (CCITT). As of March 1, 1993, recommendations from this group will
be known as ITU-T Recommendations. Recommendations made before March 1, 1993,
will continue to be known as CCITT Recommendations.
-
telephone call state
- In telephony,
the condition of a telephone call that reflects what the past action on that
call has been and what the next set of actions may be.
-
telephone input field
- A field type
that contains information entered by a caller using pushbutton signals.
-
telephony
- The use or operation of
systems for the transmission of voice or data communications between separate
points.
-
teleprocessing
- Processing data that
is received from or transmitted to a remote location by way of communication
channels.
-
Teleprocessing Network Simulator (TPNS)
- A program used to test new functions before they encounter production
volumes.
-
teleprocessing request block (TPRB)
- A function used by NPM to control input/output requests to or from terminals
to files.
-
teletypewriter (TTY)
- Originally an
electromagnetic device consisting of a combined keyboard and printer used
to communicate over telephone lines or other wired serial connections. The
abbreviation TTY is now used to describe any serial teletypewriter-like connection.
-
teletypewriter exchange service (TWX)
- Teletypewriter service in which suitably arranged teletypewriter stations
are provided with lines to a central office for access to other such stations
throughout the U.S. and Canada. Both baudot- and ASCII-coded machines are
used. Business machines may also be used, with certain restrictions.
-
Telex Correspondents File
- A file
that stores data about correspondents. When the user enters the corresponding
nickname in a Telex message, the corresponding information in this file is
automatically retrieved and entered into the Telex header area.
-
telex header area
- The first part
of the telex message. It contains control information for the telex network.
-
telex interface program (TXIP)
- A
program that runs on a Telex front-end computer and provides a communication
facility to connect MERVA ESA with the Telex network.
-
Telex Link
- The MERVA ESA component
used to link to the public telex network via a Telex substation.
-
Telex substation
- A unit comprised
of the following: Telex Interface Program, a Telex front-end computer, and
a Telex box.
-
Telnet
- In TCP/IP, a protocol that
provides remote-terminal connection service. Telnet enables users of one host
to log on to a remote host and interact as if they were directly attached
terminal users of that host.
-
Telocator Alphanumeric Protocol (TAP)
- An industry-standard protocol for the input of paging requests.
-
TEMA
- See Tivoli
Enterprise Monitoring Agent.
-
template
- (1) A pattern to help the user
identify the location of keys on a keyboard, functions assigned to keys on
a keyboard, or switches and lights on a control panel.
- (2) An object
used to create new objects of the same type. The newly created object has
the same characteristics as the template.
- (3) In REXX, a guide that
allows strings to be parsed by words (delimited by blanks), by explicit matching
of strings, or by specifying numeric positions.
- (4) A family of C++
classes or functions with variable types.
- (5) A DB2 utilities output
data set descriptor that is used for dynamic allocation. A template is defined
by the TEMPLATE utility control statement.
- (6) In WebSphere Commerce,
a predefined skeleton or pattern that determines how information displays
on a Web page. The template defines characteristics such as the location and
type of text and images, and background color.
- (7) A model of a new
Notes database. If it is a design template, it will update database design
elements created from the template.
- (8) A standard layout used in
such system communications as e-mail, approval requests, and error messages.
- (9) A HATS resource that describes the relatively static portion
of the Web pages presented by the HATS application, including a banner and
navigation area.
- (10) A predefined structure for an artifact.
- (11) In the Reusable Asset Specification (RAS), a special kind of pattern,
providing a common solution to a common problem in a given context. A template
is the most flexible in terms of manipulating its participants, as compared
to mechanisms, frameworks, and component systems.
- (12) A grouping of
elements that share common properties. These properties may be defined only
once, at the template level, and are inherited by all elements using the template.
In Java terms, this is an abstract class.
- (13) An XML representation
of the instructions that call the promotions engine.
- (14) In UML modeling,
a model element with unbound formal parameters that you can use to define
families of classifiers, packages, and operations. A parameterized model element
that describes or identifies the pattern for a group of model elements of
a particular type.
- (15) A generalized project or deliverable plan without
populated data for use by project managers for planning a project.
- (16) A predefined process of activity roadmap that can be applied to specific
process workflows and modified to meet the needs of a specific workflow. Templates
can be created, edited, cloned, or deleted.
-
template argument
- In UML modeling,
the actual value that is assigned to a template parameter to make the template
a usable model element. See also template parameter.
-
template class
- A C++ class instance
generated by a class template.
-
template file
- In Lotus Notes, a file
with the extension NTF that contains the structure for the database -- that
is, forms, folders, and views -- but does not contain documents. Domino Designer
comes with a collection of templates that can be used to create system and
application databases.
-
template function
- A C++ function
generated by a function template.
-
template instantiation
- The act of
creating a new definition of a function, class, or member of a class from
a template declaration and one or more template arguments.
-
template library
- The database, known
as the Portal Template Catalog, that stores place template specifications
and portlets forms, subforms, and profiles.
-
template parameter
- In UML modeling,
a formal parameter that, after it is bound to an actual value, makes a template
a usable model element. See also template argument.
-
template tree view
- The tree viewer
that displays the template definitions, scenario tree, and message file of
the collaboration template. Display of the template tree view is optional.
-
temporary data set
- An uncataloged
data set with a name that begins with an ampersand (&) or two ampersands
(&&) and that is normally used only for the duration of a
job or interactive session. See also permanent data
set.
-
temporary dynamic queue
- A dynamic
queue that is deleted when it is closed. Temporary dynamic queues are not
recovered if the queue manager fails, so they can contain nonpersistent messages
only. See also permanent dynamic queue.
-
temporary field
- A field that is used
during calculations. The variable that is used in the temporary field is not
stored.
-
temporary file system (TFS)
- A temporary,
in-memory physical file system that supports in-storage mountable file systems.
Normally, a TFS runs in the kernel address space, but it can be run in a logical
file system (LFS) colony address space.
-
temporary group
- A list of existing
calendars used to schedule items for a group of users in one step. The list
can be used in the current session only, after which the list is deleted.
-
temporary library
- A library that
is automatically created for each job to contain temporary objects that are
created by the system for that job. The objects in the temporary library are
deleted when the job ends. The system name for temporary library is QTEMP.
-
temporary object
- An object, such
as a data path or compiler work area, that is automatically deleted by the
system when the operating system is loaded.
-
temporary storage (TS)
- (1) The CICS facility
that allows application programs to store data in a temporary storage queue
for later retrieval.
- (2) See working storage.
-
temporary storage group identification (TSGID)
- A control block containing entries addressing each element of
a temporary storage queue. Each temporary storage queue has at least one TSGID.
Extra TSGID entries are allocated as required.
-
temporary storage queue
- A queue of
data items which can be read and reread, in any sequence. The queue is created
by a task, and persists until the same task, or a another task deletes it.
-
temporary storage table (TST)
- A table
describing temporary storage queues and queue prefixes for which CICS is to
provide recovery or security or that are located on a remote CICS system.
-
temporary storage unit table (TSUT)
- A table that contains an entry for each temporary storage identifier. Each
entry addresses either a temporary storage record in main or in auxiliary
storage, or, in the case of a temporary storage queue, the TSGID.
-
temporary table
- A table that holds
temporary data. Temporary tables are useful for holding or sorting intermediate
results from queries that contain a large number of rows. The two kinds of
temporary tables, which are created by different SQL statements, are the created
temporary table and the declared temporary table. See also base table, result table, table, declared temporary table, created temporary table.
-
temporary table space
- A table space
that can store only temporary data. See also system
temporary table space, user temporary table space.
-
temporary-text-delay character (TTD character)
- The BSC transmission control character that tells the receiving
station that there is a temporary delay in sending the data.
-
tenancy
- The period of time between
a port's winning arbitration in a loop and the return of that port to the
monitoring state.
-
Tenex C shell (tcsh)
- An enhancement
of the UNIX C shell (csh) that is compatible with csh.
-
TEP
- See terminal
error program.
-
terabit (Tb)
- For processor storage,
real and virtual storage, and channel volume, 2 to the power of 40 or 1 099
511 627 776 bits. For disk storage capacity and communications volume, 1 000
000 000 000 bits.
-
terabyte (TB)
- For processor storage,
real and virtual storage, and channel volume, 2 to the 40th power or 1 099
511 627 776 bytes. For disk storage capacity and communications volume, 1
000 000 000 000 bytes.
-
teraspace
- A one terabyte temporary
storage area that provides storage that is private to a process.
-
term
- (1) A string, symbol, or function
call contained within a REXX expression.
- (2) The smallest part of
an expression that can be assigned a value.
-
terminal
- (1) In a system or communications
network, a point at which data can either enter or leave.
- (2) The
point at which one node in a message flow is connected to another node. Terminals
can be connected to control the route that a message takes, dependent on the
outcome of the operation that is performed on that message by the node.
- (3) In data communication, a device, usually equipped with a keyboard and
display device, capable of sending and receiving information.
-
terminal abnormal condition line entry (TACLE)
- An area containing CICS error information and a copy of the data
event control block (DECB) at the time an error occurred on a non-VTAM terminal
or line. When an abnormal condition occurs on a non-VTAM terminal or line,
terminal control places the terminal out of service and dynamically creates
a TACLE, which is chained off the terminal control table line entry (TCTLE)
for the terminal or line on which the error occurred.
-
terminal adapter
- A device that connects
a computer to an external digital communications line such as an integrated
services digital network (ISDN) line.
-
terminal control
- In CICS, a facility
that handles addressing, and transmission error detection and correction for
terminals (displays and printers) associated with the local CICS system. It
also handles the intercommunication data queue used by CICS.
-
terminal control interface
- An interface
that allows an application program to send or receive a device-dependent terminal
data stream.
-
terminal control system (TCS)
- A table
defining the connections between CICS systems.
-
terminal control table (TCT)
- (1) CICS
control table retained to define non-VTAM terminal networks.
- (2) A table describing the terminals and logical units within a CICS network.
-
terminal control table line entry (TCTLE)
- A control block in the TCT for all non-VTAM terminals on the same line.
The TCTLE contains all parameters necessary for processing requests for terminals
on the line. For example, there are TCTLLEs for BSAM terminals on CICS Transaction
Server and CICS/VSE, and for TCAM terminals on CICS Transaction Server only.
The equivalent information for VTAM terminals is in the VTAM request parameter
list (RPL).
-
terminal control table system entry (TCTSE)
- In the TCT, an entry that is generated for each system known to the
local CICS system. Using resource definition macro (RDM), the DFHTCT TYPE=SYSTEM
macro defining a TCTSE must specify the applid of the remote system in the
NETNAME or the SYSIDNT option. Using resource definition online (RDO), the
CEDA DEFINE CONNECTION transaction defining a remote system generates a TCTSE,
and must specify the applid of the remote system in the NETNAME option.
-
terminal control table terminal entry (TCTE,
TCTTE)
- In the TCT, an entry for each terminal known to CICS. TCTTEs
are generated either during system initialization (for terminals predefined
by resource definition) or when a terminal is autoinstalled. The TCTTE describes
the terminal and addresses the corresponding TCTLE (RPL for VTAM terminals),
the active TCA, and TIOAs; it also contains control information relating to
terminal control requests issued by the CICS application program.
-
terminal control table user area (TCTUA)
- An area used to pass information between application programs, but only
if the same terminal is associated with the application programs involved.
-
terminal device file
- See character special file.
-
terminal emulation
- The capability
of a microcomputer or personal computer to operate as if it were a particular
type of terminal linked to a processing unit and to access data.
-
terminal endpoint identifier (TEI)
- A number to identify the endpoint to the ISDN. Normally, assignment of the
TEI can be done automatically by the ISDN.
-
terminal equipment (TE)
- In an ISDN,
data terminal equipment (DTE) that provides the function necessary for the
operation of the access protocols by the user.
-
terminal equipment 1 (TE1)
- Data terminal
equipment (DTE) with integrated ISDN support. In an ISDN, the System i system
is a TE1. See also terminal equipment 2.
-
terminal equipment 2 (TE2)
- Data terminal
equipment (DTE) without an ISDN interface. To communicate with other equipment
through an ISDN, this equipment must have the protocol converted to one that
can be recognized by the network. For example, a 7820 ISDN terminal adapter
may be used. See also terminal equipment 1.
-
terminal error block (TEB)
- Control
block that maintains error information associated with terminals, for use
by the CICS terminal error program.
-
terminal error program (TEP)
- A user-replaceable
CICS program used to handle error conditions that can occur when TCAM devices
(in CICS Transaction Server) or BTAM terminals (in CICS/VSE) or sequential
devices are used. (Node error programs must be used for VTAM-supported devices.)
The terminal error program analyzes the cause of the terminal or line error
that has been detected by the terminal control program.
-
terminal file
- The resource in a 3270
service project that contains the information necessary for connecting to
the host system during build time. Terminal files are automatically generated
when the 3270 terminal service project is created. In the Navigator view,
if a terminal file is selected, the 3270 terminal service recorder opens in
the editor area.
-
terminal identification (TID)
- The
first 9 characters of a bank identifier code (BIC).
-
terminal-initiated transaction routing
- Transaction routing that is initiated by a request to start a remote
transaction arriving from a terminal. On the basis of an installed resource
definition for the transaction and possibly on decisions made in a user-written
dynamic transaction routing program, the request is routed to the appropriate
remote system. The transaction runs as if the terminal were attached to the
transaction-owning system.
-
terminal input/output area (TIOA)
- Area that is set up by storage control and chained to the terminal control
table terminal entry (TCTTE) as needed for terminal input/output operations.
-
terminal list table (TLT)
- CICS control
table that allows terminal, or operator identifications, or both, to be grouped
logically. See also supervisory terminal functions.
-
Terminal Monitor Program (TMP)
- The
program that manages a Time Sharing Option (TSO) session.
-
terminal operator
- The user of an
Emulator High-Level Language Application Programming Interface (EHLLAPI) application
program.
-
terminal-owning region (TOR)
- A CICS
region which owns most or all of the terminals defined locally. See also application-owning region, data-owning
region.
-
terminal paging
- A set of commands
for retrieving pages of an oversize output message in any order.
-
terminal-related MSDB
- A type of MSDB
in which each segment is assigned to and owned by one logical terminal (LTERM),
the owner with terminal security may alter or update that segment, and, a
segment may be referenced by other than the owner. Terminal-related MSDBs
are fixed, which allows changes, or dynamic, which permits segment insertion
and deletion.
-
terminal response mode
- The type of
response mode that suspends all input operations from the terminal until the
application program has generated the output message. See also line response mode, response mode.
-
terminal security
- The use of system
definition macros and security maintenance utility control statements to authorize
a particular logical or physical terminal to issue some or all of the operator
commands and to send or receive some or all of the currently defined transactions.
-
terminal type (tty)
- A generic device
driver for a text display. A tty typically performs input and output on a
character-by-character basis.
-
Terminal User Control Block (TUCB)
- A control block containing terminal-specific and user-specific information
used for processing messages for display devices such as screen and printers.
-
terminate
- In SNA products, a request
unit that is sent by a logical unit (LU) to its system services control point
(SSCP) to cause the SSCP to start a procedure for ending one or more designated
LU-LU sessions.
-
terminating plug
- A part that ends
the cable path on a computer system. The terminating plug is attached to the
last disk, diskette, or tape unit in a series.
-
termination character
- A character
that defines the end of a telephone data entry.
-
termination imminent step
- The final
step of the three-step condition-handling model. In the termination imminent
step, a final chance is provided to handle conditions or to perform cleanup
before the thread is terminated. See also condition
step, enablement step.
-
termination notification
- A pending
event that is activated when a CICS subsystem successfully connects to WebSphere
MQ for z/OS.
-
termination phase
- (1) The XRF phase in
which an IMS shuts down.
- (2) The XRF phase in which the XRF complex
returns to two separate and independent environments and all XRF activity
in the alternate system stops.
-
territory
- A portion of the POSIX
locale that is mapped to the territory code for internal processing by the
database manager.
-
territory code
- A code that is used
by the DB2 database manager to preset the default collation order for an SBCS
database and to establish monetary, date, time, and numeric formatting that
is specific to a country, region, or territory.
-
tessellation
- The division of a surface
into a mesh or network.
-
test
- (1) In communications, a data link
command or response used to perform a basic test of the station-to-station
link connection.
- (2) A discipline in the software-engineering process
whose purpose is to integrate and test the system.
-
testability
- The ability of target
test items to be appropriately tested: if the target item cannot have the
required tests implemented against it, it is possibly lacking testability.
-
test asset
- The information that is
used to create, run, and evaluate tests. Test assets include plans, designs,
test cases, test logs, and test reports.
-
test case
- (1) A set of tasks, scripts,
or routines that automate the task of testing software.
- (2) The inputs,
execution conditions, and expected results that are used to evaluate an aspect
of a system under test. See also test idea.
-
test condition
- A statement that,
when taken as a whole, may be either true or false, depending on the circumstances
existing at the time the expression is evaluated.
-
test configuration
- (1) A set of characteristics
of the system that hosts the system under test. These characteristics affect
the conditions for test execution and the evaluation of test results.
- (2) A property of the integration test client that is used to specify modules
for testing and to control the tests.
-
test control (TC)
- A signal sent by
the data terminal equipment (DTE) to the attached data-circuit terminating
equipment (DCE) to signal a testing mode.
-
test coverage
- A measurement of the
extent of testing for a product. This measurement is often a percentage that
represents the degree to which a set of tests address the formal specifications
specified test cases for a system or component.
-
test driver
- A software module or
application used to invoke a test and, often, provide test data, control and
monitor execution, and report test outcomes. A test driver sequences and controls
the automated execution of one or more tests.
-
test environment
- A specific instance
of a configuration of hardware and software established for the purpose of
conducting tests under known and controlled conditions. See also deployment environment.
-
test escape
- A fault or defect that
is not detected in product testing and is found by a customer.
-
test fix
- A temporary fix that is
supplied to specific customers for testing in response to a reported problem.
See also fix pack, interim
fix, refresh pack, manufacturing
refresh, fix.
-
test harness
- A series of script files
used to enable a DB2 database for use by the DB2 XML Extender. A test harness
is optionally created when a DAD file is generated from a relational database
to XML mapping. Once enabled, it tests composing XML from data as well as
decomposing XML files into relational data.
-
test idea
- The definition of one aspect
of a possible software test that is used to evaluate the benefit of creating
that test. Examples of test ideas include inputs, execution conditions, and
expected results. See also test case.
-
test key
- A key added to a telex message
to ensure message integrity and authorized delivery. The test key is an integer
value of up to 16 digits, calculated manually or by a test-key processing
program using the significant information in the message, such as amounts,
currency codes, and the message date.
-
test-key processing program
- A program
that automatically calculates and verifies a test key. The Telex Link supports
panels for input of test-key-related data and an interface for a test-key
processing program.
-
test library
- A user-defined library
used for debugging operations that does not contain objects needed for normal
processing. See also production library.
-
test mission
- See evaluation mission.
-
test mode
- The mode that causes any
input message entered into a terminal under test to be returned to the test
terminal, with error analysis procedures bypassed.
-
test motivator
- The rationale for
testing a product.
-
test oracle
- A mechanism that determines
whether a software program passes a test case.
-
test pattern
- A template used for
the automatic generation of component tests. There are several test patterns
available for testing both Java and EJB components. See also component test.
-
test plan
- A set of test cases that
defines an area of testing.
-
test requirement
- See test idea.
-
test script
- A collection of step-by-step
instructions that realize a test, enabling its execution. Test scripts may
take the form of either documented textual instructions that are executed
manually or computer readable instructions that enable automated test execution.
-
test suite
- A collection of test cases
that define test behavior and control test execution and deployment.
-
test value
- A value used to compare
for a specified condition.
-
text
- A sequence of characters that
can be read by a person and encoded into formats such as ASCII that can be
interpreted by a computer.
-
text analysis
- The process of extracting
semantics and other information from text to enhance the retrievability of
data in a collection. See also semantic search.
-
text analysis engine (TAE)
- A software
component that is responsible for discovering and representing context and
semantic content in text. See also Common Analysis
Structure.
-
text attribute
- In the GDDM function,
characteristics of chart information, such as the color or type style.
-
text-based scoring
- The process of
assigning an integer value to a document that signifies the relevance of the
document with respect to the terms in a query. A higher integer value signifies
a closer match to the query. See also dynamic ranking, static ranking.
-
text box
- A box within a dialog box
into which a user can type information. The text box may be empty or may contain
default information when the dialog box first appears.
-
text control
- Structured field data
that control the format, placement, and appearance of text.
-
text control sequence
- A text control
and its associated data.
-
text correction
- A substitution method
that uses lexical analysis and dictionary support to propose candidates for
corrected text, for example: spelling suggestion, search query resolution,
and thesaurus lookup.
-
text editor
- A program used to create,
modify, and print or display text files.
-
text file
- A file that contains only
printable characters. See also binary file.
-
text index
- In DB2 Net Search Extender,
a collection of significant terms extracted from text documents. Each term
is associated with the document from which it was extracted.
-
text index entry
- An entry for a document
in the text search index database. The text index entry is used by the system
to locate documents when doing a text search.
-
text orientation
- A description of
the appearance of text as a combination of print direction and character rotation.
-
text search index
- In DB2 Text Search,
a collection of significant terms extracted from text documents. Each term
is associated with the document from which it was extracted.
-
text search index database
- The database
files used by text search services for storing the significant words of documents.
These database files are used when a user requests a search of the document
library for one or more phrases.
-
text search services
- The system support
that lets office users add, delete, and search for documents in the text search
index database.
-
text segmentation
-
text stream
- In the C language, an
ordered sequence of characters where each sequence or line is ended with a
new line control sequence and consists of zero or more characters.
-
text suppression
- The intentional
omission of portions of text in copy groups specified in the form definition.
-
text-to-speech (TTS)
- The process
by which ASCII text data is converted into synthesized speech.
-
text transparency
- In binary synchronous
communication (BSC), a method of sending and receiving data containing any
or all of the 256 character combinations in EBCDIC in specific bit patterns,
including transmission control characters.
-
textual data
- The collective term
for menus, displays, lists, prompts, options, online help information, and
messages.
-
textUI program
- A type of EGL program
part that interacts with the user by way of a character-based display. The
display appears in a 3270 screen or a command window, not in a Web browser.
-
TFS
- See temporary
file system.
-
TFTP
- See Trivial
File Transfer Protocol.
-
TG
- See transmission
group.
-
TGS
- See ticket-granting
service.
-
TGT
- (1) See ticket-granting
ticket.
- (2) See task global table.
-
TG vector
- A representation of an
endpoint transmission group (TG) in a T2.1 network, consisting of two control
vectors: the TG Descriptor (X'46') control vector and the TG Characteristics
(X'47') control vector.
-
TH
- See transmission
header.
-
theme
- (1) The style element that gives
a place a particular look. The portal provides several themes, similar to
virtual wallpaper, from which you can choose when creating a place.
- (2) A collective set of style sheets that supports the look and feel of
the Rational Asset Manager Web client.
-
theme extraction
- A type of concept
extraction that automatically recognizes significant vocabulary items in text
documents to extract the theme or topic of a document. See also concept extraction.
-
thin application client
- A lightweight,
downloadable Java application run time capable of interacting with enterprise
beans.
-
thin client
- A client that has little
or no installed software but has access to software that is managed and delivered
by network servers that are attached to it. A thin client is an alternative
to a full-function client such as a workstation. See also rich client.
-
Thin Console
- An appliance that provides
a 5250-based operating system console for the i5/OS operating system. This
appliance connects directly to the server using one of the HMC Ethernet ports
(labeled HMC 1 and HMC 2) on the back of the server.
-
third generation (3G)
- The next generation
of wireless technology. Multimedia 3G networks transmit wireless data up to
2 megabits per second, making possible the integration of voice, data and
video.
-
third-generation language (3GL)
- A high-level programming language that was designed to run on the third generation
of computer processors, built on integrated circuit technology roughly from
1965 to 1970. C, FORTRAN, Basic and Pascal are examples of third-generation
languages still in use today.
-
third party
- A company that manufactures
and sells applications for use with a major manufacturer's computer or peripherals,
usually without any involvement from the major manufacturer.
-
third-party plug-in
- In System i Navigator,
the support that allows users to install software from different vendors.
-
thlqual
- See target library high-level qualifier.
-
thousands of power-on hours (KPOH)
- A unit of time used to measure the mean time between failures (MTBF).
-
thousands separator
- The character
(comma in the United States) placed every third number starting left of the
decimal point. For example, three thousands separators are used in the number:
641,322,974,821.
-
thread
- (1) The DB2 structure that describes
an application's connection, traces its progress, processes resource functions,
and delimits its accessibility to DB2 resources and services. Most DB2 functions
execute under a thread structure.
- (2) A stream of computer instructions
that is in control of a process. In some operating systems, a thread is the
smallest unit of operation in a process. Several threads can run concurrently,
performing different jobs.
- (3) The messages or documents that capture
a written conversation about a topic. In Notes, a thread consists of an initial
mail message or document and all its replies, contained in a view or displayed
as a history in a document.
-
thread-capable
- Pertaining to the
ability to create threads.
-
thread contention
- A condition in
which a thread is waiting for a lock or object that another thread holds.
-
thread handle
- In DCE Remote Procedure
Call (RPC), a data item that enables threads to share a storage management
environment.
-
thread ID
- The unique integral number
that can be used to identify a thread. Thread ID is sometimes used to describe
the pthread_t data type that represents the abstraction to a thread.
-
threading
- The process whereby various
transactions undergo concurrent execution.
-
thread local storage (TLS)
- (1) See thread-specific storage.
- (2) A mechanism that
allows each thread in a multithread process to allocate storage for its corresponding
data.
-
thread private storage
- See thread-specific storage.
-
threadsafe
- Pertaining to a function,
macro, or operating system service that can be called from multiple threads
in a process at the same time. See also thread unsafe, reentrant code.
-
thread-specific storage
- Storage that
is not shared among threads, but can be accessed by all functions within that
thread.
-
thread synchronization
- The ability
to synchronize the activities of various threads. A thread synchronizes itself
with another thread by putting itself to sleep. Before doing so, the thread
notifies the operating system as to what event has to occur in order for the
thread to resume execution.
-
thread unsafe
- A thread that cannot
be called from multiple threads. See also threadsafe.
-
three-part name
- The full name of
a table, view, or alias that consists of a location name, an authorization
identifier, and an object name, separated by periods.
-
threshold
- (1) A level set in the system
at which a message is sent or an error-handling program is called. For example,
in a user auxiliary storage pool, the user can set the threshold level in
the system values, and the system notifies the system operator when that level
is reached.
- (2) In OSI, a user-specified value that determines the
frequency with which events will be reported. For example, if a certain error
threshold is set at 10, the error will not be reported until the tenth occurrence
of the error.
- (3) A customizable value for defining the acceptable
tolerance limits (maximum, minimum, or reference limit) for an application
resource or system resource. When the measured value of the resource is greater
than the maximum value, less than the minimum value, or equal to the reference
value, an exception or event is raised. See also performance
threshold.
- (4) A setting that applies to an interrupt in a simulation
that defines when a process simulation should be halted based on a condition
existing for a specified proportion of occurrences of some event.
- (5) A storage group attribute that controls the space usage on direct access storage
device (DASD) volumes, which is defined as a percentage of occupied tracks
versus total tracks.
- (6) A user-defined entity that establishes a
condition or boundary that, if exceeded, causes the data server to take a
prescribed set of actions. See also workload definition.
-
threshold analysis
- In Backup, Recovery,
and Media Services, the comparison of actual media statistics to standard
industry statistics for that media.
-
threshold definition domain
- The object
that a threshold is associated with and whose activities are monitored to
ensure that the threshold condition is not exceeded. A threshold affects only
activities within its domain.
-
threshold enforcement scope
- The area
for which a threshold is both monitored and enforced for activities to which
the threshold has been applied. Examples of this area include a workload occurrence,
a database partition, or a database.
-
threshold event
- In OSI, an event
that occurs when a counter has reached its user-specified threshold. OSI Communications
Subsystem logs threshold events and generates messages to the operator about
these events.
-
threshold value
- In the capacity planning
tool, a value used as a general guide for optimal resource utilization. If
resource utilization is above the threshold value, the resource performance
may be unacceptable. Threshold values are also available for the rate of synchronous
reads in the machine pool and for the sum of all pools. See also guideline value.
-
throttle
- (1) A condition defined in the
filter table and used to regulate the flow of traps.
- (2) The act of
cutting off or reducing input or output.
-
throttled utility
- A utility that
has a limit placed on the resources that would otherwise be consumed. The
degree to which the resources are limited is based on the current workload
of the system. Supported utilities include backup, restore, and table space
reorganization.
-
throughput
- (1) The measure of the amount
of work performed by a device, such as a computer or printer, over a period
of time, for example, number of jobs per day.
- (2) In data communications,
the total traffic between stations over a period of time.
- (3) A measure
of the amount of information transmitted over a network in a given period
of time. It is generally measured in bits per second (bps), kilobits per second
(Kbps), or megabits per second (Mbps). See also aggregate
bandwidth.
-
throughput class
- In packet switching,
the speed at which data terminal equipment (DTE) packets travel through the
packet switching network.
-
throughput class negotiation
- (1) In X.25,
a packet-switching data network optional facility that allows the data terminal
equipment (DTE) to negotiate the speed at which its packets travel through
the packet-switching data network.
- (2) In OSI, a network layer facility
that selects the speed with which data transmission requests are to be handled.
-
throughput rate
- The data processing
work successfully completed per unit of time.
-
throw
- In programming languages, to
pass an error or exception to a handling routine.
-
thumbnail
- An icon-sized rendering
of a larger graphic image that permits a user to preview the image without
opening a viewer or graphical editor.
-
thunking
- In System i Access, the
process that occurs when a 32-bit application calls a 32-bit application programming
interface that is implemented by a 16-bit component of the system.
-
TIC
- See trunk
interface card.
-
tick
- In Business Graphics Utility,
a reference point on either the vertical or horizontal axis of some chart
types that represents the location of specified data values.
-
ticket
- A mechanism for securely transmitting
the identity of a client to a server.
-
ticket-granting server
- A part of
the key distribution center (KDC) that generates service tickets. A principal
presents a ticket-granting ticket to the ticket-granting server when the principal
requests a service ticket. The ticket-granting server uses the ticket-granting
ticket to verify that the principal has authenticated to the authentication
server before it grants the request for a service ticket.
-
ticket-granting service (TGS)
- A service
provided by the key distribution center (KDC) that issues service tickets.
-
ticket-granting ticket (TGT)
- (1) A ticket
that a principal passes to the ticket-granting server when a service ticket
is requested. The ticket-granting service uses the ticket-granting ticket
to verify that the principal has authenticated to the authentication server
before it grants the request for the service ticket.
- (2) A ticket
that allows access to the ticket granting service on the key distribution
center (KDC). Ticket granting tickets are passed to the principal by the KDC
after the principal has completed a successful request. In a Windows 2000
environment, a user logs on to the network and the KDC will verify the principal's
name and encrypted password and then send a ticket granting ticket to the
user.
-
TID (XID)
- (1) See transaction identifier.
- (2) See terminal
identification.
-
TIE
- See technical
information exchange.
-
tier
- A group of servers that share
a function in an application.
-
tiered SLA
- A service level agreement
(SLA) that includes an offering containing at least one previously deployed
SLA. They can be used to include the results of operational level agreements,
internal SLAs or outsourced SLAs, in an external SLA that are supplied to
a customer.
-
tie-up record (TUR)
- In the CICS backup
while open (BWO) facility, a record in the forward recovery journal that associates
a file name with a data set name.
-
TIFF
- See Tagged
Image File Format.
-
TIFF-F
- See Tag Image File Format-Fax.
-
tight loop
- A loop in a single program
that never returns control to the program or operating system.
-
tightly coupled multiprocessing
- A type of processing in which two computing systems operate simultaneously
under one control program while sharing resources.
-
tilde
- One of the accent marks in
Latin script (~).
-
time
- A three-part value that designates
a time of day in hours, minutes, and seconds.
-
time-based update detection
- A means
of determining when rows were last updated, using the ROW CHANGE TIMESTAMP
expression.
-
time code
- A codes that is used to
classify reported time.
-
time differential factor (TDF)
- In
the DCE Distributed Time Service (DTS), the difference between coordinated
universal time (UTC) and the time in a particular time zone.
-
Time Division Multiple Access (TDMA)
- A digital communication technology used by some carriers to provide PCS service.
TDMA is a multiplexing technology used with satellites and cell phones, in
which multiple channels of data are interleaved (each signal is assigned to
a different time interval, and the signals are transmitted by taking turns).
See also extended time division multiple access.
-
time-division multiplex bus
- A method
of transmitting many channels of data over a smaller number of physical connections
by multiplexing the data into timeslots, and demultiplexing at the receiving
end. In this document one such channel can be considered to be a half-duplex
unidirectional stream of 64 kilobits per second.
-
timed payment
- A payment that is to
be scheduled before its schedule time. This capability is used by Continuous
Linked Settlement (CLS). In MERVA Liquidity Manager, timed payments are scheduled
even if the corresponding currency, channel, or partner banks are stopped.
-
time duration
- A DECIMAL (6,0) value
that represents a number of hours, minutes, and seconds.
-
time event
- An event that denotes
the time elapsed since the current state was entered.
-
time expression
- An expression that
resolves to an absolute or relative value of time.
-
time-independent messaging
- See asynchronous messaging.
-
timemark
- A specific period of time
that is allowed by the Telnet server to verify that a connection is still
active.
-
Time-Modulated Ultra-Wide Band (TM-UWB)
- New wireless technology that greatly broadens bandwidth. Developed by
Time Domain, TM-UWB uses short, coded pulses transmitted over a wide range
of frequencies, making it useful for a broad range of applications from networking
to through-the-wall radar and secure communications.
-
time-of-day clock (TOD clock)
- A timing
device that counts units of time based on the starting point of 00 hours,
00 minutes, and 00 seconds on January 1, 1900. Time-of-day (TOD) information
is used to monitor computer operations and events. See also time tolerance.
-
timeout
- (1) A time interval that is allotted
for an event to occur or complete before operation is interrupted.
- (2) An event that occurs at the end of a predetermined period of time that
began at the occurrence of another specified event.
- (3) Abnormal termination
of either an application or the DB2 for z/OS subsystem because of the unavailability
of resources.
-
time provider (TP)
- In the DCE Distributed
Time Service (DTS), a process that queries coordinated universal time (UTC)
from a hardware device and provides it to the server.
-
time provider interface (TPI)
- In
the DCE Distributed Time Service (DTS), an interface between the DTS server
and external time provider process.
-
timer
- (1) A BTS object that expires when
the system time becomes greater than a specified time, or after a specified
period has elapsed.When you define a timer, a timer event is automatically
associated with it. When the timer expires, its associated event fires.
- (2) A task that produces output at certain points in time.
-
timer domain
- Major component of CICS
that provides interval timing and alarm clock services for CICS domains. These
are processes that cause an action to occur at some predetermined future time.
This service can be performed after a specific interval, at periodic intervals,
at a specified time of day, or at a specific time of day every day. It also
provides date and time provision and conversion facilities.
-
timer event
- An atomic event that
fires when its associated timer expires. See also user-defined event.
-
timeron
- A unit of measurement used
to give a rough relative estimate of the resources required, or the cost,
for the database server to execute two plans for the same query. The resources
calculated in the estimate include weighted processor and I/O costs.
-
timer-related event
- A CICS interval
control function that is used to support events that are delayed, suspended,
or restarted after a time interval.
-
time sharing
- Sharing computer time
and resources.
-
Time Sharing Option (TSO)
- A base
element of the z/OS operating system with which users can interactively work
with the system. See also Interactive System Productivity
Facility.
-
Time Sharing Option Extensions (TSO/E)
- A licensed program that is based on Time Sharing Option (TSO). With
TSO/E, MVS users can interactively share computer time and resources.
-
Time Sharing Option single point of control (TSO
SPOC)
- An IBM-supplied application from which a user can manage
operations of all IMS systems within an IMSplex.
-
time slice
- The amount of processor
time (specified in milliseconds) allowed for a job before other waiting jobs
of equal priority are allowed to process data.
-
time slicing
- A mechanism that preempts
running threads at fixed intervals. This ensures that every thread is allowed
time to execute.
-
time slot
- The smallest switchable
data unit on a data bus, consisting of eight consecutive bits of data. One
time slot is equivalent to a data path with a bandwidth of 64 kilobits per
second.
-
time stamp
- The value of an object
that indicates the system time at some critical point in the object's history.
-
timestamp
- A seven-part value that
consists of date and time. The timestamp is expressed in years, months, days,
hours, minutes, seconds, and microseconds.
-
timestamp duration
- A DECIMAL (20,6)
value that represents a number of years, months, days, hours, minutes, seconds,
and microseconds.
-
timetable
- A schedule of times. In
business process modeling, timetables are usually associated with resources
or costs. For resources, timetables indicate availability (such as Monday
to Friday). For costs, timetables are useful if the cost varies with time
of day (such as electricity) or time of year (such as seasonal foods).
-
time tolerance
- The difference between
the TOD clocks on two adjacent nodes, beyond which the path manager will not
allow a session to be established. See also time-of-day
clock.
-
time to live
- (1) A technique used by
best-effort delivery protocols to inhibit endlessly looping packets. The packet
is discarded if the TTL counter reaches 0.
- (2) The time interval in
seconds that an entry can exist in the cache before the name server discards
it.
-
time variance (TV)
- The difference
between budgeted cost of work performed (BCWP) and budgeted cost of work scheduled
(BCWS) in weeks.
-
time variance at completion (TEAC)
- Schedule at completion divided by schedule performance index.
-
TIMI
- See technology-independent
machine interface.
-
timing constraint
- A specialized validation
action used to measure the duration of a method call or a sequence of method
calls. See also validation action.
-
TIOA
- See terminal
input/output area.
-
title
- In OSI, a permanent identifier
for an object.
-
title bar
- The area at the top of
each window that can contain the system-menu symbol, the name of the window,
and the maximize, minimize, and restore buttons.
-
Tivoli administrator
- In a Tivoli
environment, a system administrator who has been authorized to perform systems
management tasks and manage policy regions in one or more networks.
-
Tivoli client
- A client of a Tivoli
server. See also Tivoli server.
-
Tivoli desktop
- In the Tivoli environment,
the desktop that system administrators use to manage their network computing
environments.
-
Tivoli Enterprise Monitoring Agent (TEMA)
- In Internet Service Monitoring, the agent that converts and sends test
results received from the Internet service monitors to IBM Tivoli Monitoring.
-
Tivoli environment
- The configured
Tivoli applications installed in a Tivoli management region.
|
|
-
Tivoli GUID
- A globally unique identifier
(GUID) that identifies a managed object in a Tivoli environment. The Tivoli
GUID is a type 1 GUID.
-
Tivoli management agent (TMA)
- In
a Tivoli environment, an agent on the endpoint that securely performs administrative
operations.
-
Tivoli management gateway
- In a Tivoli
environment, a system that enables bidirectional communication with Tivoli
management agents.
-
Tivoli management region (TMR)
- See Tivoli region.
-
Tivoli management region client
- See managed node.
-
Tivoli management region role
- In
a Tivoli environment, the role an administrator has in the local Tivoli management
region (region) and any connected region. The region role propagates the assigned
authorization level to all resources in the region. For example, if a Tivoli
administrator has a senior role in a region, then the administrator has the
senior role over every resource in that region.
-
Tivoli management region server
- See Tivoli server.
-
Tivoli management software
- Tivoli
Enterprise software that enables organizations to centrally manage their computing
resources (including the critical applications that drive business performance
and profits) in a simple and straightforward manner.
-
Tivoli name registry
- On a Tivoli
server, a lookup table of resource labels and object identifiers that is used
to prevent name-space conflicts. The Tivoli name registry is also the link
between resources in connected Tivoli regions.
-
Tivoli NetWare repeater
- In a Tivoli
environment, a server application that is installed on a Novell NetWare server
and that maintains a list of available clients for the server. The Tivoli
NetWare repeater works with the NetWare managed site to perform profile distribution.
-
Tivoli Performance Viewer
- A Java
client that retrieves the Performance Monitoring Infrastructure (PMI) data
from an application server and displays it in various formats.
-
Tivoli Plus module
- In a Tivoli environment,
a management module that has been certified by the Tivoli Partner Association
and that enables a specific vendor application to be managed by Tivoli management
software. To be certified by the Tivoli Partner Association, the Tivoli Plus
module must include certain features such as enablement for the Tivoli Business
Systems Manager.
-
Tivoli Presentation Services Web Component Library
(WCL)
- An Integrated Solutions Console technology that includes
a foundation layer and a set of reusable Web components that enable developers
to create scalable and extendable user-interface components for Web applications.
-
Tivoli region
- The Tivoli server and
the set of managed node gateways and endpoints that it serves. An organization
can have more than one region. A Tivoli region addresses the physical connectivity
of resources, whereas a policy region addresses the logical organization of
resources.
-
Tivoli SANergy (SANergy)
- A product
of Tivoli that delivers shared data access at the speed of a storage area
network (SAN), using fibre channel, the Small Computer System Interface (SCSI),
or the iSCSI. Using standard networks and file systems, SANergy provides multiple
computers with the power to dynamically share file and data access on SAN-based
storage.
-
Tivoli server
- The server for a specific
Tivoli management region that holds or references the complete set of Tivoli
software, including the full object database. See also Tivoli client.
-
Tivoli Space Manager
- A feature of
the Tivoli Storage Manager product that handles the moving of files in and
out of a secondary storage medium based upon actual file accesses in the primary
native file system. This feature can be used with DB2 Data Links Manager to
enable DATALINK files to be stored in a virtually infinitely sized file system.
-
Tivoli Storage Manager
- A client/server
product that provides storage management and data access services in a heterogeneous
environment. Tivoli Storage Manager supports various communication methods,
provides administrative facilities to manage the backup and storage of files,
and provides facilities for scheduling backups.
-
TLIB
- See target
library.
-
TLL
- See Task
Library Language.
-
TLS
- (1) See thread
local storage.
- (2) See Transport Layer Security.
-
TLT
- See terminal
list table.
-
TMA
- See Tivoli
management agent.
-
TM database
- See Transaction Manager database.
-
TME client
- See Tivoli client.
-
tmember
- See transaction member.
-
TMF
- See Transaction
Manager Facility.
-
TMI
- See trigger
monitor interface.
-
TMP
- See Terminal
Monitor Program.
-
TMR
- See Tivoli
management region.
-
TMS
- See Transport
Manager Subsystem.
-
TM-UWB
- See Time-Modulated Ultra-Wide Band.
-
TN3270
- A standard protocol for transmitting
3270 data streams over Telnet.
-
TN5250
- A standard protocol for transmitting
5250 data streams over Telnet.
-
TOC
- See table
of contents.
-
to complete performance index (TCPI)
- The difference between budget at completion and budgeted cost of work performed
divided by the difference between budgeted at completion and actual cost of
work performed.
-
TOD clock
- See time-of-day clock.
-
to-do list
- A collection of outstanding
activities.
-
TOF
- See tokenized
form.
-
toggle
- (1) Pertaining to a switching
device, such as a toggle key on a keyboard, that allows a user to switch between
two types of operations.
- (2) To switch between two modes on a computer
or network; for example, to switch between data entry and command entry modes
or between stand-alone operation and device emulation.
-
token
- (1) The basic syntactic unit of
a computing language. A token consists of one or more characters, excluding
the blank character and excluding characters within a string constant or delimited
identifier.
- (2) In OSI, an attribute of a connection. The token is
dynamically assigned to one session-service user at a time to permit certain
services to be called. Tokens are a session layer concept.
- (3) A value
passed as a parameter for the purpose of uniquely identifying objects.
- (4) A particular message or bit pattern that signifies permission or temporary
control to transmit over a network.
- (5) A marker used to track the
current state of a process instance during a simulation run.
- (6) In checkpoint processing, an identifier that is used to determine checkpoint
I/O status.
- (7) The basic textual units that are indexed by enterprise
search. Tokens can be the words in a language or other units of text that
are appropriate for indexing. See also lexical parsing
item.
-
token bucket
- A mechanism that controls
data flow. As an application requests permission into a network, the token
bucket adds characters (or tokens) into a buffer (or bucket). If enough room
is available for all the tokens in the bucket, the application is allowed
to enter the network.
-
token highlighting
- A function of
CoOperative Development Environment/400 that allows a user to view different
programming language tokens in different colors or type styles.
-
tokenization
- The process of parsing
input into tokens.
-
tokenized form (TOF)
- A storage area
where messages are stored so that their fields can be accessed directly by
their field names and other index information.
-
tokenizer
- A text segmentation program
that scans text and determines if and when a series of characters can be recognized
as a token.
-
token management
- A system for controlling
file access in which each application performing a read or write operation
is granted some form of access to a specific block of file data. Token management
provides data consistency and controls conflicts. Token management has two
components: the token management server and the token management function.
-
token management function
- A component
of token management that requests tokens from the token management server.
The token management function is located on each cluster node.
-
token management server
- A component
of token management that controls tokens relating to the operation of the
file system. The token management server is located at the file-system manager
node.
-
token name
- An 8-byte name that can
be given to all internal objects and resource objects.
-
token number
- A nonnegative integer
that represents the name of a token.
-
token-ring network (TRLAN)
- A local
area network that connects devices in a ring topology and allows unidirectional
data transmission between devices by a token-passing procedure. A device must
receive a token before it can transmit data.
-
token type
- In CoOperative Development
Environment/400, a token or set of tokens having a similar characteristic
or function, and assigned the same display attributes by the CoOperative Development
Environment/400 program.
-
tone
- An audible signal sent across
a telephone network. There are single (one-frequency) tones, tritones (three
sequential tones at different frequencies), dual tones (two simultaneous tones
at different frequencies), and dual sequential tones. Each has a different
meaning.
-
toolbar
- (1) In a graphical user interface,
a horizontal row or a vertical column of buttons used to select desktop or
application functions.
- (2)
-
Toolbox for Java
- See IBM Toolbox for Java.
-
toolchain
- A collection of programs
or tools used to develop a product.
-
tool mentor
- A description that provides
practical guidance on how to perform specific process activities or steps
using a specific software tool.
-
ToolTip
- See hover help.
-
top category
- In an online catalog,
a category of items that has no parent.
-
top-down development
- In Web services,
the process of developing a service from a Web Services Definition Language
(WSDL) file. See also bottom-up development.
-
top-down mapping
- An approach for
mapping enterprise beans to database tables, in which existing enterprise
beans and their design determines the database design.
-
topic
- (1) In dynamic data exchange (DDE),
the data that is to be exchanged within a DDE conversation.
- (2) A
character string that describes the nature of the data that is being published
in a publish/subscribe system.
- (3) A single Web page at any level
within an information center hierarchy.
- (4) An independent unit of
information that follows the rules for a specific information type and that
is meaningful when it is displayed alone.
-
topic-based subscription
- A subscription
specified by a subscribing application that includes a topic for filtering
of publications.
-
topic collection
- (1) A functional group
of Web pages. A topic collection can be a grouping at any level within an
information center hierarchy.
- (2) A set of closely related topics
that is presented in a standard hierarchy within an information unit.
-
topic security
- The application of
access control lists to one or more topics to control subscriber access to
published messages.
-
top-level business object
- The individual
business object at the top of a hierarchical business object. It is a parent
business object but does not itself have a parent business object. See also
hierarchical business object.
-
topology
- (1) The physical or logical
mapping of the location of networking components or nodes within a network.
Common network topologies include bus, ring, star, and tree.
- (2) In the broker domain, the brokers, collectives, and connections between them.
- (3) An inventory of CICS and CICSPlex SM resources, and a map of
their relationships. CICSPlex SM supports the definition of resource and system
topology.
- (4) In fibre-channel technology, the configuration of the
fibre-channel network and the resulting communication paths allowed. Possible
topologies are point-to-point, switched fabric, and arbitrated loop.
- (5) A graphical breakdown of a transaction displayed in an hierarchical
arrangement of software components and transactions.
- (6) A graphical
view of a configured item and its relationships.
-
topology console
- A console that displays
systems and networking information provided by the topology server. The topology
console uses color to indicate the status of objects from individual resources
to entire networks.
-
topology definition
- A named subset
of CICS and CICSPlex SM resources. Topology definitions are user-created and
can include CICSplexes, CICS systems, and CICS system groups.
-
topology manager
- A function of the
Managed System Services program that is responsible for collecting topology
information from nodes and clients in the network. The topology manager can
reside on any system in the network; however, this system is most likely to
be the central site system.
-
Topology Services
- A component of
CICSPlex SM that is responsible for maintaining topology information about
CICSplexes and resources, and making it available to other CICSPlex SM components.
-
topology subnetwork
- A group of APPN
nodes that share a common topology database.
-
TOR
- See terminal-owning
region.
-
Total Access Communication System (TACS)
- An analog cellular phone system deployed mostly in Europe. It was modeled
after the AMPS system in the U.S.
-
total accumulator
- In DFU, a storage
area where final totals for a field are kept. See also batch accumulator.
-
total charge
- In an advanced order,
the cost of all order items, along with additional fees and taxes. See also
current charge.
-
total cost of ownership (TCO)
- A methodology
for calculating the actual cost of owning a product over the period of ownership
and use based on combining costs of acquisition or leasing, training, deployment,
support, residual equipment values, return on investment, time to market,
and so forth.
-
total record
- In RPG, an output record
written after a group of detail records. Total records generally contain data
that is the result of calculations performed on the information in a group
of detail records. See also detail record.
-
total reserve amount
- The portion
of the balance of the RTGS-Express channel that is reserved for express payments
that are not timed payments.
-
TotalStorage Enterprise Storage Server (ESS)
- See IBM TotalStorage Enterprise Storage
Server.
-
total time
- The part of the RPG program
cycle in which calculation and output operations specified for a group of
records are done. See also detail time.
-
touch
- To set a flag in a window that
indicates that the information in the window could differ from the that displayed
on the terminal device.
-
touchpoint
- The interface to an instance
of a managed resource, such as an operating system or a server. A touchpoint
implements a sensor and an effector for the managed resource, and maps the
sensor and effector to existing interfaces. See also effector, manageability interface, sensor.
-
tower
- In the DCE Cell Directory Service
(CDS), a set of physical address and protocol information for a particular
server.
-
TP
- (1) See transaction
program.
- (2) See time provider.
- (3) See transmission priority.
-
TPA
- See trading
partner agreement.
-
TPDU
- See transport-layer
protocol data unit.
-
TPF
- See Transaction
Processing Facility.
-
TPI
- See time
provider interface.
-
tpipe
- See transaction pipe.
-
TPN
- See transaction
program name.
-
TPNS
- See Teleprocessing
Network Simulator.
-
TPPCB
- See telecommunication program PCB.
-
TPRB
- See teleprocessing
request block.
-
TP record
- See transaction program record.
-
trace
- (1) A record of the processing
of a computer program or transaction. The information collected from a trace
can be used to assess problems and performance.
- (2) A DB2 for z/OS
facility that provides the ability to collect monitoring, auditing, performance,
accounting, statistics, and serviceability (global) data.
- (3) In the
Unified Modeling Language (UML), a dependency that indicates a historical
or process relationship between two elements that represent the same concept
without specific rules for deriving one from the other.
- (4) In DB2
replication, a facility that is used to collect monitoring, auditing, and
performance data for the Capture program, the Q Capture program, the Apply
program, the Q Apply program, or the Replication Alert Monitor.
- (5) To record data that provides a history of events occurring in the system.
-
traceability
- The ability to trace
a project element to other related project elements, especially those related
to requirements.
-
traceability item
- Any project element
which needs to be explicitly traced from another project element in order
to keep track of the dependencies between them.
-
traceability matrix
- A view that illustrates
the relationships between requirements of the same or different types. This
matrix is used to create, modify, and delete traceability relationships and
view indirect relationships and traceability relationships with a suspect
state. See also suspect relationship state, view.
-
traceability relationship
- See trace to/trace from relationship.
-
traceability tree
- A view of requirements
of a single type that displays other requirements traced to or from them.
See also view.
-
traceback
- A section of a dump that
provides information about the stack frame, the program unit address, the
entry point of the routine, the statement number, and status of the routines
on the call-chain at the time the traceback was produced.
-
trace domain
- Major component of CICS
used by CICS system code and user applications to record and manage trace
information on CICS internal, auxiliary, and GTF trace services.
-
trace file
- A file that contains a
record of the events that occur in the system.
-
trace level
- A level associated with
each trace point. The level of a trace point depends on where the trace point
is and on what sort of detail it can provide on a trace call. Most trace points
are trace level 1 or 2.
-
trace log
- A log that maintains of
history of trace activity.
-
trace point
- One of several defined
places in the CICS code from which trace entries can be written to any currently
selected trace destination.
-
trace sequence diagram
- A graphical
representation of an application's dynamic behavior, represented in a sequence
diagram format. A trace sequence diagram provides the application's flow of
control over time and is annotated with timing, code coverage, memory usage,
and threading information.
-
trace to/trace from relationship
- A relationship between two requirements that implies the source, derivation,
or dependencies between the requirements. The trace to/trace from state appears
in a Traceability Matrix or Traceability Tree when a relationship is created
between two requirements.
-
tracing routine
- A routine that provides
a historical record of specified events in the execution of a program.
-
track
- (1) A circular path on the surface
of a disk or diskette on which information is magnetically recorded and from
which recorded information is read.
- (2) A unit of storage on a count-key-data
(CKD) device that can be formatted to contain a number of data records. See
also data record, track-descriptor
record, home address.
-
trackball
- A stationary input device
for a notebook computer that consists of a ball that can be rotated with the
finger or thumb.
-
track-descriptor record
- A special
record on a track that follows the home address. The control program uses
the track-descriptor record to maintain certain information about the track.
The record has a count field with a key length of zero, a data length of 8,
and a record number of 0. This record is sometimes referred to as R0. See
also track.
-
tracked log
- In an RSR environment,
the system log data set on the tracking IMS to which the log records received
from the active IMS are written.
-
tracked terminal
- In XRF (CICS/VSE
only), a terminal belonging to a class mainly comprised of VTAM terminals
that are not eligible for class 1. For these terminals, the alternate system
tracks the session, and attempts reestablishment after takeover. The CICS
Transaction Server equivalent of this is class 2 terminal.
-
tracker
- See tracking IMS.
-
tracker's log
- In an RSR environment,
the online log data set for the log of the tracking IMS.
-
tracking
- (1) In XRF, the process by which
the alternate CICS system mirrors the starting and stopping of terminal sessions
in the active CICS system so that it is prepared to take over the active system
should the need arise.
- (2) The capability that a learning management
system provides to capture student progress and interaction data produced
by content for storage in, and subsequent retrieval from, a data store.
-
tracking IMS
- In an RSR environment,
an IMS that tracks the activities of active IMSs to provide disaster recovery
support. A tracking IMS is usually geographically remote from the active
IMSs. See also active IMS, Remote Site Recovery.
-
tracking phase
- The XRF phase during
which the active processes the IMS workload and the alternate maintains IMS
control blocks to duplicate those in the active and uses surveillance to check
the active for signs of failure.
-
tracking subsystem
- See tracking IMS.
-
track packing
- A technique used by
DFSMSdss to build target tracks for any direct access storage device (DASD)
using physical record information as input.
-
track record address (TTR)
- A representation
of a relative track address (track-track-record). The TTR is a 2-byte unsigned
number of tracks and a 1-byte block (record number).
-
track recovery
- An option for recovery
from permanent read/write errors on VSAM data sets. Track recovery permits
database reconstruction at the track level rather than the data set level.
-
trading mechanism
- In WebSphere Commerce,
a method by which buyers and sellers carry out business transactions. Depending
on the edition of WebSphere Commerce, these methods may include: fixed price,
contract, RFQ, and auction.
-
trading partner
- A company, such as
a manufacturer or a supplier, that agrees to exchange information using electronic
data interchange, or an entity in an organization that sends and receives
documents that are translated. See also external partner.
-
trading partner agreement (TPA)
- The formal agreement between trading partners.
-
trading position
- See offer.
-
trading position container
- A price
list that contains offers, also known as trading positions. The trading positions
in a trading position container are made available to customers by associating
the trading position container with the terms and conditions of one or more
contracts.
-
Traditional Chinese
- The Chinese character
set expressed in traditional form. Traditional Chinese characters are used
in Taiwan, China (Hong Kong S.A.R. of the PRC), and some other parts of the
world.
-
Traditional Chinese double-byte character set
- An IBM-defined DBCS for Traditional Chinese, consisting of Traditional
Chinese non-Chinese set, primary set, secondary set, and up to 2,632 user-definable
characters.
-
Traditional Chinese non-Chinese character set
- A subset of the Traditional Chinese DBCS, consisting of non-Chinese
characters, such as Greek, Russian, Roman numeric, alphanumeric and related
symbols, Katakana, Hiragana, special symbols and Chinese phonetic symbols.
There are 675 characters in this set.
-
Traditional Chinese primary character set
- A subset of the Traditional Chinese DBCS, consisting of commonly used
Chinese characters. There are 5,401 characters in this set.
-
Traditional Chinese secondary character set
- A subset of the Traditional Chinese DBCS, consisting of less commonly
used Chinese characters. There are 7,652 characters in this set.
-
traditional file management
- The part
of the operating system that controls the storing and accessing of traditional
file objects (*FILE objects in the QSYS.LIB library) on a System i system.
The data may be on internal storage (for example, database objects), on external
media (diskette, tape, or printer objects), or on another system.
-
traditional line data
- A form of line
data that is prepared for printing on a line printer, such as 6262 or 3211.
See also line data.
-
traffic
- In data communication, the
quantity of data transmitted past a particular point in a path.
-
traffic conditioning
- In QoS, control
functions that are performed to enforce rules specified in a traffic conditioning
agreement. Types of traffic conditioning include metering, marking, shaping,
and policing.
-
traffic profile
- In QoS, a description
of the temporal properties of a traffic stream such as rate and burst size.
-
traffic regulation anomaly
- A deviation
from normal network traffic patterns that is detected by an intrusion detection
system. A traffic regulation anomaly could indicate a denial-of-service attack
or a hacker who is monitoring connections to a Web server.
-
traffic shaping
- In QoS, a group of
techniques that attempt to regulate or meter the flow of packets through the
network.
-
trailer
- A control structure that
indicates the end of an electronic transmission.
-
trailer label
- A file or data set
label that follows the data records on a unit of recording media.
-
trailing character
- A character that
holds the last position in a word.
-
transaction
- (1) An exchange between two
programs that carries out an action or produces a result. An example is the
entry of a customer's deposit and the update of the customer's balance. See
also conversation, session.
- (2) A unit of processing consisting of one or more application
programs, affecting one or more objects, that is initiated by a single request.
- (3) A specific set of input data that triggers a specific process
or job. A transaction also can refer to a message destined for an application
program.
- (4) An atomic series of SQL statements that make up a logical
unit of work. All of the data modifications made during a transaction are
either committed together as a unit or rolled back as a unit. See also multisite update, unit of recovery, remote unit of work, transaction.
-
transaction abend code
- A four-character
code, defined by CICS or the user, that is used when abnormally terminating
a transaction. CICS-defined transaction abend codes begin with the letter
'A'. A transaction abend code is used to indicate the cause of an error that
may have occurred in CICS code or in a user program. See also transaction dump code.
-
transactional
- Pertaining to an application
program that is divided into segments, where each segment typically requests
an I/O operation with a terminal user, giving up control to other application
program segments for the duration of the I/O operation.
-
transactional collaboration
- A collaboration
that provides compensation for its service calls and executes under the control
of InterChange Server transaction services. Such a collaboration can roll
back when a runtime error causes the collaboration to fail. See also compensation, minimum transaction level.
-
transactional mode
- A mode of operation
in which install and remove operations occur in two phases: the preparation
phase and the commit phase. See also commit operation, preparation phase.
-
Transactional VSAM
- A DFSMS/MVS function
that provides record-level sharing and transactional recovery for VSAM data
sets. Transactional VSAM provides a data set access mode that is used by DBRC
to provide parallel RECON data set access.
-
transaction backout
- The cancellation,
as a result of a transaction failure, of all updates performed by a task.
-
transaction backout program
- A program
(part of the emergency restart function) that is invoked during emergency
restart, and that reads backout information (written to the restart data set
by the recovery utility program) for task, message, DL/I, and file tables.
-
transaction backout table
- In the
restart data set, a summary table that contains an entry for each task for
which system log records have been copied to the restart data set. Each entry
indicates whether the task is in-flight, active, or completed. Data in this
table is available to user-written exit programs.
-
transaction-based replication
- In
SQL replication, a type of processing in which every transaction is replicated
to the target table when it is committed in the source table. See also transaction-consistent replication.
-
transaction capabilities application part (TCAP)
- Part of the SS7 protocol that provides transactions within the
signaling network. A typical use of TCAP is to verify a card number, for the
credit card calling service.
-
transaction class
- An interface class
that defines all of the methods that a business object implements and that
an application can use. See also message class.
-
transaction code
- (1) For the IMS subsystem,
the first 1 to 8 characters of the first segment of a message sent to IMS/VS.
The transaction code identifies the application program for which the message
is intended.
- (2) A 1- to 8-character alphameric code that invokes
an IMS message processing program.
- (3) In IMS and CICS, an alphanumeric
code that calls an IMS message processing program or a CICS transaction. Transaction
codes have 4 characters in CICS and up to 8 characters in IMS.
-
transaction command security
- The
use of system definition macros and security maintenance utility control statements
to permit specific application programs to issue some of the IMS operator
commands.
-
transaction-consistent replication
- In SQL replication, a type of processing in which the net result of all transaction
updates is replicated to the target table. See also transaction-based replication.
-
transaction deadlock
- A condition
in which two or more transactions cannot continue processing because each
is waiting on a resource held by the other.
-
transaction dump
- In CICS, a formatted
dump for the program active at the time the dump was requested. A transaction
dump indicates where the error occurred within the program.
-
transaction dump code
- A name of up
to four characters by which a transaction dump will be known. When a transaction
abend causes CICS to create a transaction dump, the associated transaction
abend code is used as the transaction dump code. See also dump code, transaction abend code.
-
transaction dump table (TDT)
- A CICS
table which may contain an entry for each transaction dump code. See also
dump code.
-
transaction file
- (1) A file containing
data, such as customer orders, that is usually used only with a master file.
- (2) In COBOL, an input-output file used to communicate with display
stations and ICF sessions.
-
transaction ID (XID)
- See transaction identifier.
-
transaction identifier (TID, TRANSID, XID, transaction
ID)
- (1) A unique name that is assigned to a transaction and is used
to identify the actions associated with that transaction.
- (2) A number
associated with each of several request-parameter lists that define requests
belonging to the same data transaction.
-
transaction isolation
- A CICS facility
that offers storage protection between transactions, ensuring that a program
of one transaction does not accidentally overwrite the storage of another
transaction. See also storage protection.
-
transaction level
- The degree of transactional
isolation that a transactional collaboration provides. Transactional isolation
involves keeping the data that the transaction affects from being affected
by other processes (such as other collaborations). See also minimum transaction level.
-
transaction list table (XLT)
- CICS
control table containing a list of transaction identifications. Depending
on a system initialization specification that can be changed during system
termination, the transactions in a particular XLT can be initiated from terminals
during the first quiesce stage of system termination. During CICS execution
the suffix of an XLT can be entered at the master terminal - the transactions
in that XLT can then be enabled or disabled as a group.
-
transaction load balancing
- An optional
facility that enables a transaction to be scheduled into more than one message
or batch message region at the same time. See also load balancing.
-
transaction lock
- A lock that is used
to control concurrent execution of SQL statements.
-
transaction manager
- (1) A function that
assigns identifiers to transactions, monitors their progress, and takes responsibility
for transaction completion and failure recovery.
- (2) A software unit
that coordinates the activities of resource managers by managing global transactions
and coordinating the decision to commit them or roll them back.
- (3) See sync point manager.
-
Transaction Manager database (TM database)
- A database that is used to log transactions when a two-phase commit
(SYNCPOINT TWOPHASE) is used with DB2 databases. In the event of transaction
failure, the TM database information can be accessed to resynchronize databases
involved in the failed transaction.
-
transaction manager domain
- A CICS
domain that provides transaction-related services to create, terminate, purge,
and inquire on tasks; and manage transaction definitions and transaction classes.
The transaction manager domain is designed to provide greater reliability
and improved function; it has minimal impact on end users.
-
Transaction Manager Facility (TMF)
- In MQSeries for Compaq NonStop Kernel, a subsystem to protect your business
transactions and the integrity of your databases. Often used synonymously
with NonStop Transaction Manager/MP.
-
transaction member (tmember)
- The
name of a client that connects to an OTMA group.
-
transaction messaging
- The ability
to associate an item of data, such as a transaction identifier, with a voice
message. The voice message can subsequently be retrieved by referencing the
data value.
-
transaction-mode processing
- In SQL
replication, a type of replication subscription-set processing in which the
Apply program retrieves data from the source CD table, then applies the data
to the target table in the same commit sequence that is used at the source.
The Apply program processes transactions for all subscription-set members
together, rather than sequentially. See also table-mode
processing.
-
transaction-oriented BMP
- A BMP that
performs transaction-type processing in a batch environment. A transaction-oriented
BMP gets its input from the IMS message queues and may also use the message
queues for output. See also batch-oriented BMP program.
-
transaction-oriented programming
- See pseudoconversational design.
-
transaction pipe (tpipe)
- A named
IMS process management resource. An OTMA client must specify this resource
when submitting a transaction to IMS. A tpipe is analogous to an LTERM.
-
transaction processing
- A style of
computing that supports interactive applications in which requests submitted
by users are processed as soon as they are received. Results are returned
to the requester in a relatively short period of time. A transaction processing
system supervises the sharing of resources for processing multiple transactions
at the same time
-
Transaction Processing Facility (TPF)
- An IBM platform for high volume, online transaction processing. It is
used by industries demanding large transaction volumes such as airlines and
banks. See also program update tape.
-
transaction processing system
- An
IMS in a multisystem environment that accepts transactions from the front-end
system, calls application programs for transaction processing, and routes
all replies back to the front-end system for response to the terminal. See
also front-end system, pseudo-front-end
system.
-
transaction program (TP)
- (1) A program
that uses the Advanced Program-to-Program Communications (APPC) application
programming interface (API) to communicate with a partner application program
on a remote system.
- (2) A user-supplied application program for processing
data received by the system from a finance device.
- (3) A program that
processes transactions in an SNA network.
-
transaction program name (TPN)
- (1) In
SNA LU 6.2 conversations, the name of the program at the remote logical unit
that is to be the other half of the conversation.
- (2) The name by
which each program participating in an LU 6.2 conversation is known. Normally,
the initiator of a connection identifies the name of the program it connects
to at the other LU. When used in conjunction with an LU name, a TPN identifies
a specific transaction program in the network.
-
transaction program network
- The hierarchical
structure of user or system transaction programs communicating at a synchronization
level of none, confirm, or commit. When the synchronization level is commit,
the transaction programs communicate over protected conversations using the
two-phase commit protocol. In this case, the hierarchy consists of an initiator,
optionally one or more cascaded initiators, and agents.
-
transaction program record (TP record)
- TP records are part of the user data that follows the attach FMH header
in an APPC basic conversation. These records indicate the function the sign-on
transaction program is to perform; for example, signon or signon and change
password.
-
transaction rate
- The number of units
of processing successfully completed per unit of time.
-
transaction restart program
- (1) In CICS
Transaction Server 3.3 (and earlier) and CICS/VSE, a user-replaceable CICS
program (DFHRTY) used to modify the conditions under which a transaction is
restarted by CICS after dynamic transaction backout.
- (2) In CICS Transaction
Server 4.1 (and later), a user-replaceable program (DFHREST) that enables
you to participate in the decision as to whether a transaction should be restarted
or not.
-
transaction routing
- (1) A CICS facility
that provides support for inbound and outbound terminal requests from another
CICS system connected by an advanced program-to-program communications (APPC)
link.
- (2) An intercommunication facility that allows terminals or
logical units connected to one CICS region to initiate and to communicate
with transactions in another CICS region within the same processor system
or in another CICS system connected by an APPC link.
-
transaction security
- A call to RACF
(CICS Transaction Server) or to the CICS security program (DFHXSP) (CICS/VSE)
each time a transaction identifier is entered at a terminal to verify that
the terminal user or userid associated with that terminal is permitted to
run the transaction.
-
transaction services layer
- In SNA
networking, the functional layer that establishes a logical interface for
the end user.
-
transaction-system affinity
- An affinity
between a transaction and a particular CICS region, where the transaction
interrogates or changes the properties of that CICS region. Transactions with
affinity to a particular system, rather than another transaction, are not
eligible for dynamic transaction routing. In general, they are transactions
that use INQUIRE and SET commands, or have some dependency on global user
exit programs, which also have an affinity with a particular CICS region.
-
transaction table
- One of three types
of database tables in the InterChange Server repository, the transaction tables
store the status of each transaction being processed, which may include the
action and business objects, depending on the transaction level. The two other
types of database tables in the repository are the event management tables
and the repository tables.
-
transaction work area (TWA)
- An optional
extension of the TCA, used as a work area for a given task. The TWA can be
used for the accumulation of data and intermediate results during the execution
of the task. When the amount of working storage for a task is relatively static,
the TWA may be used if data is accessed by different programs during task
processing. This approach cannot be used for multiple transactions; the TWA
is released automatically at task termination. See also common work area.
-
transceiver
- In communications, the
device that connects the transceiver cable to the Ethernet coaxial cable.
The transceiver is used to transmit and receive data.
-
transceiver cable
- In communications,
the cable along with its connectors that connects the input/output adapter
to the transceiver.
-
transcoding
- The operation of changing
data from one format to another, such as XML to HTML, so that the output will
be displayed in a manner appropriate to the device.
-
transcoding technology
- Content adaptation
to meet the specific capabilities of a client device.
-
Trans-European Automated Real-Time Gross Settlement
Express Transfer (TARGET)
- A real-time gross settlement (RTGS)
payment system composed of one RTGS system in each European Member States,
plus the European Central Bank payment mechanism. Payments are made across
TARGET to or from other countries and not directly to other members of CHAPS-Euro.
-
transfer
- To copy an application EAR
file to the server, usually by FTP. See also deploy.
-
transfer counter
- See committed page counter.
-
transfer mode
- Aspects covering transmission,
multiplexing, and switching in a communications network.
-
transferred scope element
- A scope
element that has been integrated into the project work breakdown structure
for execution and time tracking
-
transfer request
- In System i Access,
a description of the file that is to be transferred to a personal computer
from i5/OS or from a personal computer to i5/OS.
-
transfer station
- Printing process
at which the data set becomes visible to the operator, and is therefore the
point at which all operator commands are directed.
-
transfer syntax
- (1) In DCE Remote Procedure
Call (RPC), a set of encoding rules used for transmitting data over a network
and for converting application data to and from different local data representations.
See also abstract syntax.
- (2) In OSI, a
set of rules for the representation of user information while it is in transit
between presentation layer entities. The transfer syntax is usually derived
from the abstract syntax by use of encoding rules.
-
transform
- (1) To change the composition
of a data stream (AFP) to perform the same functions in a different data stream
(ASCII).
- (2) To translate a Java class file to a System i Java program.
- (3) To convert a document from one form to another, such as using
a purchase order formatted as an XML document to create the same purchase
order formatted as an EDI document. See also translate.
- (4) A defined way in which a message of one format is converted
into one or more messages of another format.
- (5) In a virtual private
network (VPN), a collection of authentication algorithms, Diffie-Hellman groups,
and encryption algorithms that are used during both phases of negotiation.
- (6) A program that converts a data stream from one format to another,
for example, from PCL to AFP or PDF to AFP. Transforms provided by IBM are
implemented as dynamic link library (DLL) filters.
- (7) A collection
of installation-related changes that are applied to a Windows Installer database.
-
transform algorithm
- A procedure that
is used to transform the message for Web services security message processing,
such as the C14N (canonicalization) transform that is used for XML digital
signatures.
-
transformation
- (1) The process of changing
the structure and values of data from one form to another.
- (2) A HATS
resource that specifies how to convert components of a host screen into widgets
on a Web page.
-
transformation step
- A segment of
Java code that returns the value of a destination attribute. A map contains
one transformation step for each destination attribute that is being transformed.
-
transformer
- A device that converts
power from one circuit to another at the same frequency, but at a changed
voltage and current.
-
transform function
- (1) A function that
is used to exchange structured data type values in one direction between a
DB2 server and host language programs.
- (2) A DataStage function that
computes a value from an original value.
-
transform group
- A set of transform
functions that is used to exchange structured data type values between a DB2
server and host language programs.
-
transform service
- A function of the
i5/OS operating system that converts PostScript Level 1 spooled files to output.
This output can be printed on either IBM Advanced Function printers (i5/OS
system printers) or Hewlett Packard Printer Control Language printers (commonly
used PC printers).
-
TRANSID
- See transaction identifier.
-
transient
- Pertaining to a program
or subroutine that does not reside in main storage.
-
transient data (TD)
- A CICS facility
that provides the ability to read and write data in sequential queues.
-
transient data control program
- The
CICS program that controls sequential data files and intrapartition transient
data.
-
transient data queue
- A file to which
runtime messages are written under CICS. A transient data queue also is a
sequential data set used by the Folder Application Facility in CICS/MVS to
log system messages.
-
transient error
- In OSI, an error
that occurs once or at unpredictable intervals--for example, network congestion.
See also permanent error.
-
transient event
- In OSI, an event
that indicates the occurrence of an intermittent error or an error that can
be recovered through retry. Transient events are logged but do not result
in messages to the operator. See also permanent event.
-
transient object
- An object that exists
only during the execution of the process or thread that created it.
-
transient routine
- A library routine
that is loaded at run time. See also resident routine.
-
transit delay processing
- In OSI,
an X.25 quality-of-service function that keeps track of delays that data encounters
on the way to its destination. Any node that receives a call packet can reject
it if the transit delay exceeds the maximum specified by the sender.
-
transition
- (1) A relationship between
two states indicating that an object in the first state performs certain specified
actions and then enters the second state when a specified event occurs and
specified conditions are satisfied. On such a change of state, the transition
is said to fire.
- (2) The phase of the software development life cycle
in which the final product is completed and made available to users.
- (3) In a business state machine, the connection between states that guards
the execution between them. A transition recognizes an appropriate triggering
operation, evaluates the conditions necessary for execution to flow through
the transition, and determines the actions that can occur if execution is
allowed.
-
transition condition
- A Boolean expression
that determines when processing control should be passed to the targeted node.
-
transition link
- In a collaboration
template's activity diagram, the line that indicates control flow between
two nodes. If more than one outcome is possible between the nodes, each outcome
is represented by a different transition link that leads to a different execution
path. Each transition link may have an associated condition that is evaluated
at runtime. Flow passes along the transition link whose expression evaluates
to true. If the nodes have a single transition link, its condition is assumed
to be true. See also control flow, exception transition link, normal transition link.
-
transition relationship
- In UML modeling,
a relationship that represents a workflow between activities. See also self-transition relationship.
-
transition table
- A temporary table
that contains all of the affected rows of a subject table in their state before
or after a triggering event occurs. Triggered SQL statements in the trigger
definition can reference the table of changed rows in the old state or the
new state. See also table locator.
-
transition variable
- A variable that
is valid only in FOR EACH ROW triggers. It allows access to the transition
values for the current row. An old transition variable is the value of the
row before the modification is applied, and the new transition variable is
the value of the row after the modification is applied.
-
translate
- (1) To check source code of
an automatic class selection (ACS) routine for syntactic and semantic errors.
If no errors exist, the translation process generates an object table from
the source code and places the object table into a specified source control
data set (SCDS).
- (2) In early versions of WebSphere Data Interchange,
to convert a document from one form to another. See also transform.
-
translation table
- A user-defined
table that is used to translate data values that differ between the source
and target documents. For example, a manufacturer and supplier with different
part numbers for the same item can use a translation table to convert their
part numbers to the other company's part numbers during translation.
-
translation unit
- A source file together
with all headers and source files included via the preprocessing directive
#include, less any source files skipped by any of the conditional inclusion
preprocessing directives.
-
translative mode
- A mode in which
private devices can communicate with public devices across the fabric.
-
translator
- (1) An i5/OS component that
performs the final step in a program or module compilation. In the Integrated
Language Environment (ILE) model, this is called the optimizing translator.
- (2) A component, usually the Data Interchange Services translator
component, responsible for translating a document from one format to another.
-
transliterate
- To map correspondences
from one writing system to another.
-
transmission
- The sending of data
from one place for reception elsewhere.
-
transmission character
- A 10-bit character
encoded according to the rules of the 8B/10B algorithm.
-
transmission control block (TCB)
- An internal control block within the Transmission Control Protocol/Internet
Protocol (TCP/IP) address space.
-
transmission control character
- (1) In
data communications, a special character that can be included in a message
to control communications over a data link. For example, the sending station
and the receiving station use transmission control characters to exchange
information; the receiving station uses transmission control characters to
indicate errors in data it receives.
- (2)
-
transmission control layer
- In SNA,
the layer within a half-session that synchronizes and controls the speed of
session-level data traffic, checks sequence numbers of requests, and enciphers
and deciphers end-user data.
-
Transmission Control Protocol (TCP)
- A communication protocol used in the Internet and in any network that follows
the Internet Engineering Task Force (IETF) standards for internetwork protocol.
TCP provides a reliable host-to-host protocol in packet-switched communication
networks and in interconnected systems of such networks. See also Internet Protocol.
-
Transmission Control Protocol/Internet Protocol
(TCP/IP)
- An industry-standard, nonproprietary set of communication
protocols that provides reliable end-to-end connections between applications
over interconnected networks of different types.
-
transmission control unit (TCU)
- A communication control unit whose operations are controlled solely by programmed
instructions from the computing system to which the unit is attached. No program
is stored or executed in the unit. Examples are the IBM 2702 and 2703 Transmission
Controls. See also communication controller.
-
transmission executive
- A part of
the DSNX/PC licensed program that runs on the personal computer to control
and handle requests and to create responses for DSNX.
-
transmission group (TG)
- In SNA, a
group of links between directly attached nodes appearing as a single logical
link for routing messages. A transmission group may consist of one or more
SDLC links (parallel links) or of a single System/370 channel. For type 2.1
nodes in System i networks, a transmission group can only be a single-link
connection.
-
transmission header (TH)
- In SNA,
control information, optionally followed by a basic information unit or a
basic information unit segment, that is created and used by path control to
route messages within the network.
-
transmission medium
- In communications,
the physical path between transmitters and receivers in a communications network,
such as an Ethernet bus or a token ring.
-
transmission priority (TP)
- A rank
assigned to a message unit that determines its precedence for being selected
by the path control component in each node along a route for forwarding to
the next node in the route. The four possible values are low, medium, high,
and network.
-
transmission program
- See message channel agent.
-
transmission queue
- A local queue
on which prepared messages destined for a remote queue manager are temporarily
stored.
-
transmission-queue data set
- In IP
PrintWay, a data set containing an entry for each data set that IP PrintWay
is to transmit to the remote system or that IP PrintWay is retaining on the
Job Entry Subsystem (JES) spool.
-
transmission services (TS)
- A switched,
nonswitched, or packet-switched communications line provided by a vendor.
-
transmission services profile (TS profile)
- In SNA, specified in a request to start a session. Each defined transmission
services profile is identified by a number.
-
transmission word
- A group of four
transmission characters. See also data word.
-
transmitter
- An electronic circuit
that converts an electrical logical signal to a signal suitable for the communications
medium (optical or electrical).
-
transparency
- (1) A picture or text on
an acetate sheet designed to be viewed by light shining through it.
- (2) In asynchronous communications, a method of hiding certain ASCII control
characters from modems or asynchronous devices.
- (3) See transparent text mode.
- (4) Terminal attribute whereby data is
not translated between terminal and main storage representation on read or
write requests. This allows the transmission of all 256 possible byte values.
-
transparent bridging
- In LANs, a method
for tying individual local area networks together through the medium access
control (MAC) level. A transparent bridge stores the tables that contain MAC
addresses so that frames seen by the bridge can be forwarded to another LAN
if the tables indicate to do so.
-
transparent data
- (1) Data that can contain
any hexadecimal value.
- (2) A set of code points that is interpreted
as presentable data, not as control data. In the AFP architecture, transparent
data is identified with a control byte and a count of the number of bytes
that follow.
-
transparent DDL statement
- A DDL statement
that can be executed at a federated server to create and modify remote tables
without using a pass-through session.
-
transparent text mode
- In binary synchronous
communications, a method of transmission in which only transmission control
characters preceded by the DLE control character are processed as transmission
control characters.
-
transport
- (1) The request queue between
a WebSphere Application Server plug-in for Web servers and a Web container
in which the Web modules of an application reside. When a user at a Web browser
requests an application, the request is passed to the Web server, then along
the transport to the Web container.
- (2) The process or protocol mechanism
of transferring an XML message or document between parties as part of a meaningful,
reliable exchange. The most common transports for web services are SOAP/HTTP,
SOAP/HTTPs, and SOAP/JMS.
-
transportable program
- A program object
that has been converted into a nonexecutable form for transfer to other systems.
-
Transportation Data Coordinating Committee (TDCC)
- An organization that sets standards for the motor, rail, ocean,
and air industries administered by EDIA. This is the original EDI organization
for the United States, and through it, the original EDI Standards were developed,
published, and maintained. It has now changed its name to EDIA, and has become
the national EDI user group for the United States.
-
transport chain
- A representation
of a network protocol stack that is operating within an application server.
-
transport channel chain
- A specification
of the transport channels that are used by a server for receiving information.
Transport channel chains contain end points
-
transport class 0 (class 0)
- In OSI,
the simplest of five classes of service (0-4) or protocols defined in the
transport layer. (I)
-
transport class 2
- In OSI, the transport
layer class that provides an intermediate level of service.
-
transport class 4 (class 4)
- In OSI,
the most complex of five classes of service (0-4) or protocols defined in
the transport layer. (I)
-
transport class negotiation
- In OSI,
the process by which the peer application entities decide the Transport Layer
class to use on an association.
-
transport layer
- In OSI architecture,
the layer that provides services for flow control and recovery between open
systems with a predictable quality of service.
-
transport-layer protocol data unit (TPDU)
- In OSI, a protocol data unit in the transport layer. (I)
-
Transport Layer Security (TLS)
- An
Internet Engineering Task Force (IETF)-defined security protocol that is based
on Secure Sockets Layer (SSL) and is specified in RFC 2246.
-
transport-layer service access point (TSAP)
- In OSI, a service access point in the transport layer. (I)
-
transport-layer service data unit (TSDU)
- In OSI, a unit of data transferred between the session layer and the
transport layer.
-
Transport Manager Subsystem (TMS)
- In an RSR environment, the subsystem that provides communication services
to IMS components.
-
transport mode
- In the OSI Communications
Subsystem licensed program, a set of values that determine the transport layer
functions to be used on an association.
-
transport mode name
- In OSI, the name
of a transport mode to be used for an association. The network administrator
specifies the transport mode name on an application mode.
-
transport protocol
- A specification
of the rules that govern the exchange of information between components of
a transport network; for example, the User Datagram Protocol (UDP).
-
transport provider
- In MPTN architecture,
a component that provides the transport functions associated with a particular
transport protocol stack.
-
TRANSX
- A type of monitor that simulates
the actions of a real Internet user by executing a series of activities, which
the monitor performs using other Internet service monitors.
-
trap
- (1) An unsolicited event generated
by an agent and forwarded to a manager. Traps inform the manager of changes
that occur in the network.
- (2) In the Simple Network Management Protocol
(SNMP), a message sent by a managed node (agent function) to a management
station to report an exception condition.
- (3) An unprogrammed, hardware-initiated,
conditional jump to a specific address. A trap occurs as a result of an error
or certain other conditions. A record is made of the location from which the
jump occurred.
- (4) A message that reports a problem or a significant
event.
- (5) A special statement used to catch signals within the z/OS
shell.[OSF]
- (6) In REXX, to recognize that a currently enabled condition
occurred and to perform the CALL or SIGNAL instruction specified when the
condition trap was enabled.
-
TRC
- See table
reference character.
-
tree
- (1) A hierarchical collection of
nodes that can have an arbitrary number of references to other nodes. A unique
path connects every two nodes.
- (2) A data structure whose elements
are linked in a hierarchical fashion.
-
tree node
- See node.
-
tree structure
- A data structure that
represents entities in nodes, with at most one parent node for each node,
and with only one root node.
-
tree view
- (1) A view that provides a
hierarchical view of an object and the objects that it contains.
- (2) See traceability tree.
-
T reference point
- In Performance
Tools, the interface between network termination 2 (NT2) and network termination
1 (NT1).
-
trend
- A series of related measurements
that indicates a defined direction or a predictable future result.
-
trend analysis
- A type of analysis
that displays the analysis of the changes in a given item of information over
a period of time.
-
trend direction
- The direction in
which a data set is trending, either upwards, downwards, or remaining constant.
-
trended value
- The approximate value
of monitored data for a given forecast period.
-
tributary station
- In data communications,
a secondary device on a multipoint line.
-
trigger
- (1) A database object that is
associated with a single base table or view and that defines a rule. The rule
consists of a set of SQL statements that runs when an insert, update, or delete
database operation occurs on the associated base table or view. See also before trigger, delete trigger, insert trigger, trigger
activation, trigger activation time, trigger granularity, after trigger, instead of trigger, update trigger.
- (2) In database technology, a program that is automatically called whenever a
specified action is performed on a specific table or view. See also read trigger.
- (3) A mechanism that causes something to begin.
- (4) Data values for which AFP Conversion and Indexing Facility (ACIF)
searches, to delineate the beginning of a new group of pages. The first trigger
is then the anchor point from which ACIF locates the defined index values.
- (5) A monitor that specifies one or more standard programs or built-in
actions to be executed whenever a certain ClearCase operation is performed.
- (6) A condition that signals that a risk factor should be monitored.
- (7) A mechanism that detects an occurrence and can cause additional
processing in response.
- (8) To initiate or reinitiate copying between
a pair of virtual disks (VDisks) that have a copy relationship.
-
trigger action
- A set of actions (high-level
language statements, SQL statements, or i5/OS utilities) that are performed
automatically when a specified change operation (trigger event) occurs on
a specified table or file.
-
trigger activation
- The process that
occurs when the trigger event that is defined in a trigger definition is executed.
Trigger activation consists of the evaluation of the triggered action condition
and conditional execution of the triggered SQL statements. See also before trigger, trigger, trigger activation time, trigger event, after trigger.
-
trigger activation time
- An indication
in a trigger definition of whether the trigger should be activated before
or after a trigger event. See also before trigger, trigger, trigger activation, trigger event, after trigger.
-
trigger body
- The set of triggered
SQL statements that is executed when a trigger is activated and its triggered
action condition evaluates to true. See also triggered
action, triggered action condition, triggered SQL statement.
-
trigger cascading
- The process that
occurs when the triggered action of a trigger causes the activation of another
trigger.
-
triggered action
- The SQL logic that
is performed when a trigger is activated. The triggered action consists of
an optional triggered action condition and a set of triggered SQL statements
that is run only if the triggered action is true. See also trigger body, triggered action condition, trigger event, triggered SQL
statement.
-
triggered action condition
- An optional
part of a triggered action. This Boolean condition is defined by a WHEN clause
and specifies a condition that is evaluated to determine whether the triggered
SQL statements should be run. See also trigger body, triggered action, triggered
SQL statement.
-
triggered response
- In a Tivoli environment,
the action that is taken when a monitor reaches or exceeds a threshold.
-
triggered SQL statement
- One of a
set of SQL statements that is run when a trigger is activated and its triggered
action condition evaluates to true. The set of triggered SQL statements is
also called the trigger body. See also trigger body, triggered action, triggered
action condition.
-
trigger event
- (1) In a CREATE TRIGGER
statement, the specification of an insert, update, or delete operation on
a specified table that activates the trigger. See also trigger activation, trigger activation time, triggered action, trigger granularity.
- (2) A change operation that calls the trigger action to be run.
The trigger event can be an insert, update, or delete operation in any high-level
language and in SQL.
- (3) An event, such as a message arriving on a
queue, that causes a queue manager to create a trigger message on an initiation
queue.
-
trigger field
- In BMS, a field that
is transmitted to the host processor as soon as the terminal operator has
modified the field and then tries to move the cursor out of it. You can use
display trigger fields to initiate input to an application program. The trigger
attribute is ignored if the operator has not modified the trigger field.
-
trigger granularity
- In SQL, the characteristic
of a trigger that determines whether the trigger is activated only once for
the triggering SQL statement or once for each row that the SQL statement modifies.
See also trigger, trigger
event.
-
triggering
- In WebSphere MQ, a facility
that allows a queue manager to start an application automatically when predetermined
conditions on a queue are satisfied.
-
triggering event
- (1) The business object
that a connector sends to subscribing collaborations when an application event
occurs.
- (2) The specified operation in a trigger definition that causes
the activation of that trigger. The triggering event is comprised of a triggering
operation (insert, update, or delete) and a subject table or view on which
the operation is performed.
-
triggering SQL operation
- The SQL
operation that causes a trigger to be activated when the operation is performed
on the subject table.
-
trigger level
- The number of records
written to an intrapartition transient data destination or queue that will
cause CICS to automatically initiate a task to process that queue. See also
automatic transaction initiation.
-
trigger message
- A message that contains
information about the program that a trigger monitor is to start.
-
trigger monitor
- A continuously running
application that serves one or more initiation queues. When a trigger message
arrives on an initiation queue, the trigger monitor retrieves the message.
It uses the information in the trigger message to start a process that serves
the queue on which a trigger event occurred.
-
trigger monitor interface (TMI)
- The WebSphere MQ interface to which customer- or vendor-written trigger monitor
programs must conform. A part of the WebSphere MQ Framework.
-
trigger package
- In DB2 for z/OS,
a package that is created when a CREATE TRIGGER statement is executed. The
package is executed when the trigger is activated.
-
trigger point
- In REXX, a threshold
or boundary limit used in the REXX FORMAT function.
-
trigger program
- A program that contains
a set of trigger actions.
-
trigger time
- The time the trigger
action runs before or after the trigger event operates.
-
trigraph
- A sequence of three graphic
characters that represent another graphic character. For example, in the C
programming language, the trigraph ??= is used to denote the # character.
-
trim
- To remove a list entry from
the end of a list opposite from the end where the new entry was added.
-
trimming
- Removal of records or bytes
that are no longer required.
-
triple Data Encryption Standard (triple DES)
- A block cipher algorithm that can be used to encrypt data transmitted
between managed systems and the management server. Triple DES is a security
enhancement of DES that employs three successive DES block operations.
-
triple DES
- See triple Data Encryption Standard.
-
triplet
- A length byte, a type byte,
and one or more parameter-value bytes in a Formatted Data Object Content Architecture
(FD:OCA) descriptor.
-
Trivial File Transfer Protocol (TFTP)
- In Internet communications, a set of conventions that transfers files
between hosts using minimal protocol.
-
TRLAN
- See token-ring network.
-
Trojan horse
- A computer program that
appears to perform a useful and innocent function. However, it contains hidden
functions that use approved authorizations assigned to users when they start
the program. For example, it may copy internal authorization information from
a computer and send it back to the originator of the Trojan horse.
-
trombone
- A connected voice path which
enters an IVR from a switch on one circuit, then returns to the same switch
on a parallel circuit. Two IVR ports and two circuits are consumed, but in
some circumstances this might be the only way to make a connection between
two callers if the attached switch does not support a Call Transfer function.
-
troubleshooter
- An application that
assists a user in locating a problem and that provides a possible solution
to the problem.
-
trouble ticket
- A record of a problem
that has occurred. The trouble ticket becomes the formal vehicle to trace
a problem from its occurrence to its resolution.
-
TRUE
- See task-related
user exit.
-
true alias
- A program alias for which
the entry point is the same as the primary entry point.
-
True Image data view
- A data view
that allows a file to be restored in the event of accidental deletion. It
consists of point-in-time images that provide a near-instant virtual copy
of an entire storage volume.
-
truncate
- (1) To cut off data that cannot
be printed or displayed in the line width specified or available. See also
fold.
- (2) To shorten a field, value, statement,
or string.
-
truncation
- The process of discarding
part of a result from an operation when it exceeds memory or storage capacity.
-
trunk
- (1) In telephony, circuits that
connect two switching systems, as opposed to connecting a customer line to
a switching system.
- (2) In the CVS team development environment, the
main stream of development, also referred to as the HEAD stream.
- (3) A telephone connection between two central offices or switching devices. In
DirectTalk, a trunk refers to 24 or 30 channels carried on the same T1 or
E1 digital interface. See also channel.
-
trunking
- A function of the VTAM class
of service facility. Trunking enables explicit routes to use parallel links
between specific nodes.
-
trunk interface card (TIC)
- The component
of the VPACK that manages the trunk connection to the switch. See also base card.
-
trunk line
- A telecommunications line
that links a private telecommunications system to a public switched network.
-
trust anchor
- A trusted keystore file
that contains a trusted certificate or a trusted root certificate that is
used to assert the trust of a certificate.
-
trust association
- An integrated configuration
between the security server of the product and third-party security servers.
A reverse proxy server acts as a front-end authentication server, while the
product applies its own authorization policy onto the resulting credentials
passed by the proxy server.
-
trust association interceptor (TAI)
- The mechanism by which trust is validated in the product environment for every
request received by the proxy server. The method of validation is agreed upon
by the proxy server and the interceptor.
-
trust attribute
- An attribute upon
which to establish trust. A trusted relationship is established based on one
or more trust attributes.
-
trusted
- (1) Pertaining to the control
of a security policy.
- (2) Pertaining to a federated wrapper that is
defined, via the DB2_FENCED wrapper option, to run in the database manager
process. When a wrapper runs in trusted mode, the database manager is not
protected from changes made by this object. See also fenced.
-
Trusted Computing Base (TCB)
- (1) The
combination of hardware and software in a computer system that enforces a
unified security policy. This term is used by the U.S. Department of Defense.
- (2) The part of the system that contains all the elements that support
the security policy of the system. The trusted computing base includes all
hardware, microcode, and software that protect information on the system.
-
trusted connection
- A database connection
whose attributes match the attributes of a unique trusted context defined
at the DB2 database server. See also explicit trusted
connection, implicit trusted connection.
-
trusted connection reuse
- The ability
to switch the current user ID on a trusted connection to a different user
ID.
-
trusted context
- A database security
object that enables the establishment of a trusted relationship between a
DB2 database management system and an external entity.
-
trusted context default role
- The
role that is inherited by all users of a trusted context unless it is overridden
by a user-specific role in the trusted context definition. See also trusted context user-specific role.
-
trusted context user
- A user ID to
which switching the current user ID on a trusted connection is permitted.
-
trusted context user-specific role
- A role that is associated with a specific trusted context user. It overrides
the trusted context default role if the current user ID on the trusted connection
matches the ID of the specific trusted context user. See also trusted context default role.
-
trusted identity evaluator
- A mechanism
that is used by a server to determine whether to trust a user identity during
identity assertion.
-
trusted relationship
- A privileged
relationship between two entities such as a middleware server and a database
server. This relationship allows for a unique set of interactions between
the two entities that would be impossible otherwise.
-
trusted root
- (1) In the Secure Sockets
Layer (SSL), the public key and associated distinguished name of a certificate
authority (CA).
- (2) A certificate authority's certificate merged into
the Domino Directory, client's browser, or the server's key ring file, which
allows clients and servers to communicate with any client or server that has
that certificate authority's certificate marked as trusted.
-
trusted system
- A system in a network
over which you have control of security. A trusted system can directly communicate
only with other systems in the network.
-
trust file
- A file that contains signer
certificates.
-
trust relationship
- An established
and trusted communication path through which a computer in one domain can
communicate with a computer in the other domain. Users in a trusted domain
can access resources in the trusting domain.
-
truststore
- In security, a storage
object, either a file or a hardware cryptographic card, where public keys
are stored in the form of trusted certificates, for authentication purposes
in Web transactions. In some applications, these trusted certificates are
moved into the application keystore to reside with the private keys. See also
keystore.
-
truststore file
- A key database file
that contains the public keys for a trusted entity.
-
try block
- A C++ block in which a
known exception is passed to an exception handler. See also catch block.
-
TS
- (1) See temporary
storage.
- (2) See transmission services.
-
TSAP
- See transport-layer
service access point.
-
TSAP selector
- In OSI, an external
identifier for a service access point at the Transport Layer. The TSAP selector
is part of a presentation address.
-
TSDU
- See transport-layer
service data unit.
-
TSGID
- See temporary storage group identification.
-
Tsm Router
- In WebSphere Voice Server,
a process that controls which engine processes are being used at any time.
Requests for an engine by a WebSphere Voice Server Client are accepted or
rejected depending on whether an engine meeting the Tsm Client's criteria
is available.
-
TSO
- See Time
Sharing Option.
-
TSO attachment facility
- A DB2 facility
consisting of the DSN command processor and DB2I. Applications that are not
written for the CICS or IMS environments can run under the TSO attachment
facility.
-
TSO/E
- See Time Sharing Option Extensions.
-
TSO SPOC
- See Time Sharing Option single point of control.
-
TS profile
- See transmission services profile.
-
TST
- See temporary
storage table.
-
TSUT
- See temporary
storage unit table.
-
TTD character
- See temporary-text-delay character.
-
TTOC
- See tape
table of contents.
-
TTR
- See track
record address.
-
TTS
- See text-to-speech.
-
tty
- See terminal
type.
-
TTY
- See teletypewriter.
-
TUCB
- See Terminal
User Control Block.
-
tumble
- Pertaining to printing on
both sides of a sheet of paper such that the bottom of the printed image on
one side of the paper is juxtaposed against the top of the printed image on
the other side of the paper. See also simplex.
-
tune
- A piece of music or other audio
data intended to be played as background music.
-
tuning
- The process of adjusting an
application, a system, or system control variables to operate in a more efficient
manner.
-
tunnel
- An L2TP access concentrator
(LAC)-L2TP network server (LNS) pair. A tunnel carries Point-to-Point Protocol
(PPP) datagrams between the LAC and the LNS. There may be many sessions in
a single tunnel. A control connection that operates in the tunnel controls
the establishment, release, and maintenance of sessions and the tunnel itself.
-
tunneling
- (1) Treating a transport network
as though it were a single communication link or local area network (LAN).
- (2) In Sametime, the encapsulation of one protocol within another.
In Sametime, the Meeting Services and Community Services connection methods
can be encapsulated within the HTTP or HTTPS protocol. This capability enables
clients who connect to the Internet through HTTP or HTTPS proxy servers to
establish Meeting Services and Community Services connections.
-
tuple
- See row.
-
TUR
- See tie-up
record.
-
turnaround
- In communications, pertaining
to changing a communications line from being able to send to being able to
receive, or from being able to receive to being able to send.
-
turnaround time
- (1) In communications,
the time required to reverse the direction from sending to receiving or from
receiving to sending on a communications line.
- (2) The elapsed time
between entry of the first character of the first input into the input interface
and the passage of the last character of the last output through the output
interface.
- (3) The total time consumed from the start to the completion
of a specific unit of work measured at specific interfaces. When multiple
inputs and/or multiple outputs are parts of one unit of work, intermediate
turnaround time specifications may be needed.
-
Tutorial System Support
- An education
course, supplied with the operating system licensed program, that provides
introductory education for a variety of computer users, including system operators
and business and data processing professionals. Tutorial System Support is
part of the total IBM curriculum for the System i platform, which consists
of classroom training and other methods of self-study.
-
TV
- See time
variance.
-
TVTOC
- See tape volume table of contents.
-
TWA
- See transaction
work area.
-
twinaxial cable
- A cable made of two
twisted wires inside a shield.
-
twinaxial console
- A 5250-based workstation
using a twinaxial cable to connect to the system. The twinaxial console and
the Operations Console can be a backup console for each other. See also Operations Console, alternate
console, backup console.
-
twinaxial data link control (TDLC)
- A communications function that allows personal computers, which are attached
to the work station controller by twinaxial cable, to use advanced program-to-program
communications (APPC) or Advanced Peer-to-Peer Networking (APPN) support.
-
twin segments
- In a database, all
child segments of the same segment type that have a particular instance of
the same parent segment type. Root segments are also considered twins to each
other. See also physical twins, sibling segments.
-
twin-tailed
- Pertaining to a disk
that is connected to two nodes.
-
twisted-pair
- Pertaining to a transmission
medium that consists of two insulated conductors twisted together to reduce
interference. For example, twisted-pair wiring can be used as an alternative
to twinaxial cable.
-
twistie
- A triangle that a user clicks
to collapse or expand sections in Notes documents and categories or responses
in Notes views.
-
two-channel switch
- A hardware feature
with which an I/O device can be attached to two channels. A dynamic switch
can be added, which makes it possible for both interfaces to be enabled at
the same time with channel selection determined by programming.
-
Two-Party Key Distribution Protocol (2PKDP)
- A security protocol that combines bidirectional authentication with
key distribution using a minimal number of messages.
-
two-phase commit
- (1) A two-step process
by which recoverable resources and an external subsystem are committed. During
the first step, the database manager subsystems are polled to ensure that
they are ready to commit. If all subsystems respond positively, the database
manager instructs them to commit. See also distributed
transaction.
- (2) The process used by resource managers to coordinate
changes in an atomic, consistent, isolated, and durable (ACID) transaction.
In the first phase, all resource managers confirm that a transaction has been
received and that it is possible to process it. In the second phase, the changes
are committed if all the resource managers agreed to them. If any resource
manager fails to confirm that it is able to process the transaction, then
no databases are updated. Using the two-phase commit process, multiple changes
across multiple resource managers can be treated as a single ACID transaction.
-
two-port communications adapter cable
- A cable that connects a 50-pin connector on a communications adapter
card to two other communications cables that have 25-pin connectors (ports).
-
TWX
- See teletypewriter
exchange service.
-
TXIP
- See telex
interface program.
-
type
- (1) In Java programming, a class
or interface.
- (2) In DCE X/Open Object Management (XOM), a category
into which attribute values are placed on the basis of their purpose.
- (3) In object oriented programming, a fundamental data type of computer
architecture, including, for example, character, string and integer.
- (4) In a WSDL document, an element that contains data type definitions using
some type system (such as XSD).
- (5) An object that defines a data
structure.
- (6) A characteristic of an element that describes its data
content.
- (7) A description of data characteristics. The descriptions
include the operations that can be performed on or by the data. See also data type.
-
type-1 automated operator application program
- An application program that can issue a subset of IMS commands
by using the CMD call in DB/DC and DCCTL environments.
-
type-1 command
- A command, generally
preceded by a leading slash character, that can be entered from any valid
IMS command source. See also type-2 command.
-
type 1 GUID
- A globally unique identifier
(GUID) that is generated using a combination of the generating system's MAC
address, a time stamp, and a large random number. There is a very high probability
that a type 1 GUID will be unique. See also Globally
Unique Identifier.
-
type-1 index
- An index that was created
by a release of DB2 Universal Database for z/OS, Version 3, or earlier, or
that was specified as a type-1 index in Version 4. A type-1 index is also
an index that was created by a release of DB2 Universal Database for Linux,
UNIX, and Windows, Version 7, or earlier, or that was specified as a type-1
index in Version 8, or later. See also type-2 index.
-
type 2.0 node
- A node that attaches
to a subarea network as a peripheral node and provides a range of end-user
services but no intermediate routing services.
-
type 2.1 node
- An SNA node that can
be configured as an endpoint or intermediate routing node in a network, or
as a peripheral node attached to a subarea network.
-
type-2 automated operator application program
- An application program that can issue a subset of IMS commands
using the ICMD call in DB/DC, DBCTL, and DCCTL environments.
-
type-2 command
- A command that is
entered only through the OM API. Type-2 commands are more flexible and can
have a broader scope than type-1 commands. See also type-1 command.
-
type-2 index
- An index that supports
marking an index entry as pseudo deleted. See also type-1 index.
-
type 3 GUID
- A globally unique identifier
(GUID) that is generated by a uni-directional hash of textual or binary data.
The same data always produces the same GUID, however there is a very low probability
that other data will produce the same GUID. See also Globally Unique Identifier.
-
type annotation
- The association of
an XML schema type to an XML element node or XML attribute node, usually derived
from XML schema validation.
-
type conversion
- See boundary alignment.
-
typed data
- In OSI, a data transfer
service provided by the session layer that enables an application entity to
send data whether or not it has permission to send.
-
typedef
- In EGL, a part definition
that can be used as a model of format.
-
type definition
- A definition of a
name for a data type.
-
typed parameter marker
- A parameter
marker that is specified along with its target data type. It has the general
form CAST (? AS data type). See also parameter marker.
-
typed table
- A table in which the
data type of each column is defined separately or the types for the columns
are based on the attributes of a user-defined structured type.
-
typed view
- A view in which the data
type of each column is derived from the result table or the types for the
columns are based on the attributes of a user-defined structure type.
-
type expression
- An expression that
evaluates to a reference to one or more types.
-
typeface
- All characters of a single
type family or style, weight class, width class, and posture, regardless of
size. An example is Helvetica bold condensed italic, in any point size. See
also font.
-
type font
- Type of a given size and
style, for example, 10-point Latin1: Helvetica roman medium. (A)
-
type hierarchy
- The complete context
for a Java class or interface including its superclasses and subclasses.
-
type-of-failure keyword
- In diagnosing
program failures, a RETAIN keyword that identifies the type of program failure
that has occurred.
-
type of service
- In QoS, a 3-bit field
within a packet's IP header that signals to routers and other network devices
the level of QoS to apply to the packet.
-
type promotion
- The process of converting
an atomic value from an earlier data type to a later data type in an ordered
sequence. One example of an ordered sequence is INTEGER, DECIMAL, FLOAT, DOUBLE;
another example is anyURI, string. Type promotion can be used, for instance,
in function calls and in the processing of operators that accept numeric or
string operands.
-
type-safe linkage
- A method for ensuring
strict typing in C++ by resolving references to functions only when argument
types and return values match or have defined conversions, as well as matching
function names.
-
type size
- A measurement in pitch
or points of the height and width of a graphic character in a font. For example,
the vertical height (point size) of a given typeface, such as 10 point.
-
type specifier
- In programming languages,
a keyword used to indicate the data type of an object or function being declared.
-
type system
- The type system defines
the types of objects (feature structures) that may be discovered by a text
analysis engine in a document. The type system defines all possible feature
structures in terms of types and features. Any number of different types can
be defined in a type system. A type system is domain and application specific.
-
type UUID
- In DCE Remote Procedure
Call (RPC), the Universal Unique Identifier (UUID) that identifies a particular
type of object and an associated manager.
|
|
|
|
-
UA
- (1) See unnumbered
acknowledgment.
- (2) See user agent.
-
UACC
- See universal
access authority.
-
UBM
- See unified
buffer manager.
-
UBUF
- See user
buffer pool.
-
UCB
- See unit
control block.
-
UCF
- See utility
control facility.
-
UCM
- See Unified
Change Management.
-
UCS
- (1) See universal
character set.
- (2) See Uniform Communication
Standard.
-
UCS-2
- (1) 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.
- (2) Universal Character Set, coded in 2 octets, which means that each character
is represented by 16 bits. UCS-2 is a subset of UTF-16. See also UTF-8, UTF-16.
-
UDC
- See user-defined
character.
-
UDDI
- 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
- (1) See user-defined
function.
- (2) See Universal Disk Format.
-
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
- See user
interface.
-
UIB
- See user
interface block.
-
UID
- (1) See unique
identifier.
- (2) See user identification.
- (3) See user number.
-
uid (user ID)
- (1) See user identification number.
- (2) See user
identifier.
-
UIM
- See user
interface manager.
-
UIMA
- See Unstructured
Information Management Architecture.
-
UIM tag language
- A System i 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.
-
ULP_TOV
- See upper-layer timeout value.
-
ultimate consumer
- The target for
data in an input and output operation. An ultimate consumer can be a file,
a device, or an array of bytes in memory.
-
ultimate producer
- The source for
data in an input and output operation. An ultimate producer can be a file,
a device, or an array of bytes in memory.
-
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.
-
Ultra-SCSI
- An enhanced Small Computer
System Interface (SCSI).
-
UML logical architecture
- An architecture
that is an interpretation of what that architecture should look like and is
independent of the overall technology to be implemented. It is intended to
be an abstraction of it.
-
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.
-
unary expression
- An expression that
contains one operand.
-
unary operator
- (1) 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.
- (2) An operator that changes the sign of
a numeric value.
-
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 System i system as long
as the local controlling system does not have control at the time of the request.
-
unattended mode IPL
- An IPL mode that
automatically takes the system to the i5/OS operating system without any user
interaction. This is the most commonly used IPL mode. See also attended mode IPL.
-
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.
-
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.
-
unbounded-box font
- A font designed
to use unbounded character boxes. See also bounded-box
font.
-
unbounded character box
- A character
box that can have blank space on any sides of the character shape. See also
bounded character box.
-
unbound file
- A file that is defined
in the installable unit deployment descriptor but is defined as unknown in
the media descriptor.
-
unbound role
- In the Reusable Asset
Specification (RAS), a role in a collaboration that does not have a concrete
element specified.
-
UNC
- See Universal
Naming Convention.
-
uncapped partition
- A logical partition
that uses a shared processor pool whose assigned current processing capacity
might be exceeded when the shared processor pool has any unused processing
power. The value assigned to the uncapped partition determines the percentage
of unused processing power that a logical partition receives when more than
one uncapped partition is contending for the processing power in the shared
processor pool.
-
uncapped weight
- A number in the range
of 0 through 255 that can be set for each logical partition in the shared
processor pool. Based on these values, any available unused capacity is distributed
to contending logical partitions in proportion to the normalized values of
their uncapped weight.
-
uncommitted read (UR)
- An isolation
level that allows any row that is read to be changed by other applications.
UR also allows any row changed by other applications to be read, even if the
change has not been committed. For updatable cursors, the UR isolation level
is upgraded to CS. See also cursor stability, read stability, repeatable read, isolation level.
-
unconfigured mode
- A mode in which
I/O operations cannot be performed. See also access
mode, managed space mode, image mode.
-
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.
-
unconnected state
- A state of a trusted
connection in which no user is associated with the connection and no data
can be sent or received until the client switches the trusted context user
ID.
-
undefined behavior
- Referring to a
program or function that might produce erroneous results without warning because
of its use of an indeterminate value, or because of erroneous program constructs
or erroneous data. See also implementation-defined.
-
undelivered message queue
- See dead-letter queue.
-
undeploy
- To remove files or uninstall
software from an operational environment. For example, in a policy-enabled
system, policies are undeployed from the autonomic managers, making them no
longer available for use in that operational environment. See also deploy.
-
underflow
- A condition that occurs
when the result of an operation is less than the smallest nonzero number that
is allowed.
-
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
- 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.
-
underscore character
- A character
used in each position of an entry field to indicate its length. This indicator
of entry field length is used on display devices that do not have the underscore
attribute.
-
undo
- (1) A state of a unit of recovery
that indicates that the changes that the unit of recovery made to recoverable
DB2 resources must be backed out.
- (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) To recover the last edit that has taken place.
-
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.
-
undub
- To make an address space unknown
to MVS. See also dub.
-
UN/EDIFACT
- See United Nations Electronic Data Interchange for Administration, Commerce and
Transport.
-
unformatted
- Pertaining to something
that is not defined, organized, or arranged in a required manner.
-
unformatted file
- A file that is arranged
without such characteristics as a certain number of characters and lines per
page, line spacing, and headings. See also formatted
file.
-
unformatted print records
- Traditional
line data made up of fields of data that have not been formatted into print
lines. PSF uses a page definition to format these records for printing on
page printers.
-
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. See also formatted system
service.
-
unhandled condition
- A condition that
is not handled by any condition handler for any stack frame in the call chain.
See also handled condition.
-
unicast
- Transmission of data to a
single destination. See also multicast.
-
Unicode
- A character encoding standard
that supports the interchange, processing, and display of text that is written
in the common languages around the world, plus some classical and historical
texts. The Unicode standard has a 16-bit character set defined by ISO 10646.
See also multibyte character set.
-
Unicode-based white space segmentation
- A method of tokenization that uses Unicode character properties to distinguish
between token and separator characters.
-
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 i5/OS
licensed program who uses the services of i5/OS but who is not automatically
reported on by the license management function of i5/OS. An example of an
unidentified user is one who accesses a System i system through a gateway
server that is not a System i system.
-
unidirectional replication
- In Q replication,
a configuration in which changes that occur in a source table are replicated
over WebSphere MQ queues to a target table or are passed to a procedure to
manipulate the data. Changes that occur in a target table are not replicated
back to a 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 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.
-
Uniform Communication Standard (UCS)
- The EDI standard used in the grocery industry.
-
uniformly spaced font
- A font in which
the character increment for each graphic character is the same. See also proportionally spaced font.
-
Uniform Resource Identifier (URI)
- (1) 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.
- (2) A compact string of characters for
identifying an abstract or physical resource.
-
Uniform Resource Locator (URL)
- The
unique address of an information resource 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
- 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) 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.
-
union tag
- An identifier that names
a union data type.
-
uniprocessor (UP)
- A processor complex
that has one central processor.
-
unique constraint
- The rule that no
two values in a primary key or key of a unique index can be the same. See
also constraint.
-
unique file
- A Virtual Storage Access
Method (VSAM) file that occupies a data space of its own. The data space is
defined at the same time as the file and cannot contain any other file. See
also suballocated file.
-
unique identifier (UID)
- An identifier
for each symbol in an activity diagram.
-
unique index
- An index that ensures
that no identical key values are stored in a column or a set of columns in
a table.
-
unique key
- (1) A key that is constrained
so that no two of its values are equal. See also constraint, primary key, foreign
key.
- (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.
-
uniqueness threshold
- A column analysis
setting that infers whether a column is unique.
-
unique product
- A product that is
uniquely identified to the i5/OS 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
- (1) The defined space within disk
units that is addressed by the system.
- (2) A mechanical, electrical,
or electronic piece of equipment for a special purpose.
-
unit address
- (1) The address of a particular
device, specified at the time a system is installed.
- (2) In mainframe
computing, the address associated with a device on a given control unit. On
ESCON or FICON interfaces, the unit address is the same as the device address.
On OEMI interfaces, the unit address specifies a control unit and device pair
on the interface.
- (3) The identifier for a logical subsystem and the
logical device within the subsystem.
-
unit control block (UCB)
- A control
block in common storage that describes the characteristics of a particular
I/O device on the operating system. See also actual
UCB, captured UCB.
-
United Nations Electronic Data Interchange for
Administration, Commerce and Transport (UN/EDIFACT)
- An international
set of electronic data interchange (EDI) standards published by the United
Nations that is built upon X12 and TDI (Trade Data Interchange) standards.
-
United Nations Standard Products and Services
Classification (UNSPSC)
- An open global standard for classifying
products and services based on common function, purpose, and task.
-
United Nations Trade Data Interchange (UNTDI)
- A standard that predeced the UN/EDIFACT EDI standard.
-
unit name
- See device name.
-
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 (UR)
- (1) A recoverable
sequence of operations within a single resource manager, such as an instance
of DB2 for z/OS. See also unit of work, transaction.
- (2) A sequence of operations within a unit of work
between sync points.
- (3) A defined package of work to be performed
by the Resource Recovery Services (RRS).
-
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 identifier (URID)
- Persistent token used by Resource Recovery Services (RRS) to identify a transaction.
-
unit of reorganization
- For HALDB
OLR, the database records that are reorganized within one commit boundary.
-
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. See also unit of
recovery.
- (2) 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.
- (3) For IMS
DB, all of the input and output messages associated with a transaction. For
IMS TM, a single IMS message. For CQS, a client-defined grouping of data objects.
- (4) A recoverable sequence of operations within an application process.
At any time, an application process is a single UOW, but the life of an application
process can involve many UOWs as a result of commit or rollback operations.
In a multisite update operation, a single UOW can include several units of
recovery. See also multisite update, unit of recovery, remote unit of work, transaction.
-
unit of work boundary
- The point in
time when a connection disassociates itself from its current transaction.
The following events cause a unit of work boundary to be ended: a commit,
a rollback, an XA end (success), an XA commit, or an XA rollback.
-
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 reference code (URC)
- (1) 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.
- (2) The last 4 characters of the SRC.
-
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.
-
universal character set (UCS)
- (1) The
ISO 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.
- (2) A printer
feature that permits the use of a variety of character arrays.
-
Universal Description, Discovery, and Integration
(UDDI)
- A set of standards-based specifications that enables companies
and applications to quickly and easily find and use Web services over the
Internet.
-
Universal Disk Format (UDF)
- A writable
file system format designed to interchange data. UDF is a subset of ISO/IEC
13346 defined by the Optical Storage Technology Association (OSTA).
-
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.
-
universal image
- A cloned image that
can be deployed on all computers of the deployment pool. For a cloned image
to become universal, it must be prepared with all drivers for disk types and
hardware abstraction layer variants encountered in the computer deployment
pool.
-
Universally Unique Identifier (UUID)
- The 128-bit numerical identifier that is used to ensure that two components
do not have the same identifier. See also Globally
Unique Identifier.
-
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 port (U_port)
- A switch
port that can operate as a generic port (G_port), an expansion port (E_port),
a fabric port (F_port), or a fabric loop port (FL_port). A port is defined
as a U_port when it is not connected or has not yet assumed a specific function
in the fabric.
-
Universal Serial Bus (USB)
- A serial-interface
standard for telephony and multimedia connections to personal computers.
-
universal system
- Any server type
except for an iSeries server. Windows and Linux are examples.
-
universal table space
- A table space
that is both segmented and partitioned. See also segmented
table space, range-partitioned data space, partition-by growth table space.
-
Universal Time Coordinated
- See Coordinated Universal Time.
-
Universal Unique Identifier
- See Universally Unique Identifier.
-
UNIX
- A highly portable operating
system that features multiprogramming in a multiuser environment. The UNIX
operating system was originally developed for use on minicomputers, but was
adapted for mainframes and microcomputers. The AIX operating system is IBM's
implementation of the UNIX operating system.
-
UNIX authentication
- The process of
identifying a client process, which requires that the client process send
credentials to the server.
-
UNIX file
- An object that exists in
a hierarchical file system. Examples of UNIX files are HFS, ZFS, NFS, and
TFS.
-
UNIX file system (UFS)
- A section
of the UNIX file tree that is physically contained on a single device or disk
partition, and that can be separately mounted, unmounted, and administered.
-
UNIX filter
- In UNIX operating systems,
a program that obtains data from standard input (STDIN) and returns the results
to standard output (STDOUT). See also DLL filter.
-
UNIX System Services
- An element of
z/OS that creates a UNIX environment that conforms to XPG4 UNIX 1995 specifications
and that provides two open-system interfaces on the z/OS operating system:
an application programming interface (API) and an interactive shell interface.
-
unknown device
- A group of resources
that have not been discovered and are not yet populated in the data model.
-
unlike
- Pertaining to two or more
different operating environments. For example, unlike distribution is distribution
between DB2 for i5/OS and DB2 environments.
-
unlike devices
- Devices that have
different track capacities or a different number of tracks per cylinder.
-
unlink
- In IDDU, to remove the association
between a database file on disk and a file definition in a data dictionary.
See also link.
-
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.
-
unmanaged Web application
- A Web application
with a life cycle that is managed outside of the WebSphere Extended Deployment
administrative domain. By creating a representation of these applications
that are deployed through external tooling, the on-demand router can prioritize
and route HTTP requests to the application.
-
unmapped conversation
- See basic conversation.
-
unmarshal
- To copy data from a remote
procedure call packet by using a stub. See also marshal.
-
unmount
- To logically disassociate
a mountable file system from another file system.
-
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.
-
un-pend
- An event sent by a object
in the pend state that results in the moving of the object to the online state.
See also pend.
-
unplanned remote takeover
- In an RSR
environment, a remote takeover initiated by the tracking IMS to transfer
the workload from the active IMS to the tracking IMS at the remote site without
waiting for an orderly shutdown of the active IMS. See also remote takeover.
-
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 might be in
inconsistent states.
-
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. See
also unit of recovery.
-
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.
-
unprotected volume
- A volume that
is recognized by the AS/400 host as an unprotected device, even though the
storage resides on a Redundant Array of Independent Disks (RAID) and is therefore
fault tolerant by definition. The data in an unprotected volume can be mirrored.
An unprotected volume is also referred to as an unprotected device.
-
unqualified call
- In IMS, a DL/I call
that does not contain a segment search argument.
-
unqualified segment search argument
- An segment search argument that contains only a segment name that specifies
the segment type to be accessed. See also segment search
argument.
-
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.
-
unrecoverable transaction
- See nonrecoverable transaction.
-
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
- A couse 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.
-
unshielded twisted pair (UTP)
- A cable
medium with one or more pairs of twisted insulated copper conductors bound
in a single sheath.
-
unshunting
- The process of attaching
a transaction to provide an environment under which to resume the processing
of a shunted unit of work.
-
unsolicited
- Pertaining to the act
of providing information or actions to a resource, without the resource having
requested the information or action. See also solicited.
-
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 message
- A message that
is not a response to a command. See also solicited
message.
-
unsolicited output message
- An output
message that is not generated as a response to an input command. For example,
a system informational message is an unsolicited output message. In an IMS
Version 10 IMSplex environment, a command response is an unsolicited message
if it is sent to a single point of control (SPOC) that has subscribed to such
messages. That SPOC might or might not have originated the command.
-
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 (UNSPSC)
- See United Nations Standard Products and Services Classification.
-
Unstructured Information Management Application
- A software system that analyzes large volumes of unstructured
information in the form of text, audio, video, or other media to discover,
organize, and deliver relevant knowledge to the application user.
-
Unstructured Information Management Architecture
(UIMA)
- An IBM architecture that defines a framework for implementing
systems for the analysis of unstructured data.
-
UNTDI
- See United Nations Trade Data Interchange.
-
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. See also parameter marker.
-
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.
-
UP
- See uniprocessor.
-
UPA
- See user
printable area.
-
upcall
- In a Tivoli environment, a
method invocation from an endpoint up to the gateway. 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 apply fixes to a system.
- (2) To modify a file or data set with current information.
- (3) Software maintenance such as a manufacturing refresh, refresh pack,
or fix pack that changes the modification level of a product.
-
update access
- This access intent
establishes the intent of an application to modify the database. Other applications
may read the database if they do not need to be protected from the updater's
incomplete changes.
-
update-anywhere replication
- In SQL
replication, a type of replication in which all tables are both registered
sources and read-write targets. One table is the primary source table for
performing a full refresh of all of 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 detection
- See time-based update detection.
-
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
- (1) 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.
- (2) The location on which a cursor is positioned
when a row in a result table is fetched again and the new values no longer
satisfy the search condition. See also delete hole.
-
update installable unit
- An installable
unit that modifies a base installable unit, creating a new base installable
unit.
-
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. See also scheduling intent.
-
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.
-
update-only recovery
- A facility that
allows the user to define inquiry transactions as unrecoverable.
-
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 time stamp (UTS)
- In the DCE
Cell Directory Service (CDS), an attribute that identifies the time at which
the most recent change was made to any attribute of a particular CDS name.
For directories, the UTS reflects changes made only to attributes that apply
to the actual directory (not one of the replicas).
-
update transaction
- A transaction
in the DC feature system with capabilities to update a database. Update transactions
are recoverable.
-
update trigger
- A trigger that is
activated by an update operation on the table or view that is specified in
the trigger definition. See also delete trigger, insert trigger, trigger, instead of trigger, read trigger.
-
upgrade
- (1) To install a new version
or release of a product to replace an earlier version or release of the same
product.
- (2) Any hardware or software change to a later release, or
any hardware addition or software addition.
-
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.
-
U_port
- See universal port.
-
upper-layer timeout value (ULP_TOV)
- The minimum time that a Small Computer System Interface (SCSI) upper-layer
protocol (ULP) process waits for SCSI status before initiating ULP recovery.
-
up-sell
- A product recommendation
of a related yet pricier product in the same product line as the currently
displayed or selected product. 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).
-
upward-growing stack
- With Extra Performance
Linkage (XPLINK), a stack that grows from low addresses to high addresses
in memory.
-
upward integration
- The methods, processes
and procedures that enable lower-level systems-management software, such as
IBM Director Agent, to work with higher-level systems-management software,
such as Tivoli Enterprise or Microsoft SMS.
-
upward integration module
- Software
that enables higher-level systems-management software, such as Tivoli Enterprise
or Microsoft Systems Manager Server (SMS), to interpret and display data provided
by IBM Director Agent. This module also can provide enhancements that start
IBM Director Agent from within the higher-level systems-management console,
as well as collect IBM Director inventory data and view IBM Director alerts.
-
UR
- (1) See uncommitted
read.
- (2) See unit of recovery.
-
URC
- See unit
reference code.
-
URD
- See unit
of recovery descriptor.
-
URI
- See Uniform
Resource Identifier.
-
URID
- See unit
of recovery identifier.
-
URL
- (1) See Uniform
Resource Locator.
- (2) See user route list.
-
URL scheme
- A format that contains
another object reference.
-
URM
- See user-replaceable
module.
-
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 relationship
- In UML modeling,
a dependency relationship in which one model element (the client) requires
another model element (the supplier) for full implementation or operation.
See also dependency relationship.
-
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 time
- The total time that a
user, other than the asset owner, takes to gain value from an asset, measured
in hours, days, months, or years.
-
usage type
- In i5/OS, 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.
-
USAM
- See user
spool access method.
-
USB
- See Universal
Serial Bus.
-
use attribute
- The attribute assigned
to a direct access storage device (DASD) volume or system-managed tape volume
that controls when the volume can be used to allocate new data sets. The use
attributes for DASD volumes are public, private, and storage. The use attributes
for system-managed tape volumes are scratch and private. See also scratch.
-
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
- The specification of a sequence
of actions that a system can perform, interacting with users of the system.
Use cases are used in system analysis to identify system requirements. See
also include relationship, scenario.
-
use-case diagram
- A diagram that shows
the relationships among actors and use cases within a system.
-
use-case model
- A model of a software
system that describes its functional requirements in terms of use cases.
-
use-case package
- A collection of
use cases, actors, relationships, diagrams, and other items required to create
a use-case model.
-
use-case realization
- A construct
that describes how a particular use case is realized within the design model,
in terms of collaborating objects.
-
use-case view
- An architectural view
that describes how critical use cases are performed in the system, focusing
mostly on architecturally significant components (objects, tasks, nodes).
-
use count
- Number of tasks using a
program concurrently. This is maintained by CICS in the program processing
table.
-
used track
- A track from the beginning
of data sets to the last-used track.
-
user
- Any individual, organization,
process, device, program, protocol, or system that uses the services of a
computing system.
-
user abend
- A request made by user
code to the operating system to abnormally terminate a routine. See also system abend.
-
user activity keypoint
- A keypoint
written to the system log by a user transaction. See also activity keypoint.
-
user address space
- An address space
that has at least one MVS task known to the kernel address space. This address
space can contain a shell or an application program that uses UNIX System
Services.
-
user agent (UA)
- (1) 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.
- (2) An application that browses the Web and leaves information
about itself at the sites that it visits. In enterprise search, the Web crawler
is a user agent.
-
user area
- The parts of main storage
and disk available to the user.
-
user ASP
- (1) 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.
- (2) 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.
-
user assistance
- (1) 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.
- (2) The product interfaces
and technical product information that help users complete their tasks. User
assistance includes wizards, interface instructions, and contextual assistance
topics, as well as information centers and books.
-
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 buffering
- The use of a work
area in the processing program's address space for an I/O buffer; the Virtual
Storage Access Method (VSAM) transmits the contents of a control interval
between the work area and direct access storage without intermediary buffering.
-
user buffer pool (UBUF)
- An area in
each user's address space that has been divided into buffers.
-
user catalog
- An optional catalog
used in the same way as the master catalog and pointed to by the master catalog.
Employing a user catalog lessens the contention for the master catalog and
facilitates volume portability.
-
user catalog connector
- See catalog connector.
-
user class
- (1) 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.
- (2) A z/VM privilege category assigned to a user of a guest virtual machine in
the user's directory entry; each class specified allows access to a logical
subset of all the z/VM Control Program (CP) commands.
-
user classification code
- A user-defined
code that is assigned to a data field. For example, the code FIN might refer
to financial data.
-
user configuration
- In System i Access,
the set of files, created by the System i Access administrator, that define
the user's System i 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 database
- A database that records
and stores information about change requests.
-
User Datagram Protocol (UDP)
- An Internet
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 i5/OS 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 data type
- See distinct type.
-
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)
- A function
that is defined to the DB2 database system by using the CREATE FUNCTION statement
and that can be referenced thereafter in SQL statements. A UDF can be an external
function or an SQL function. See also function, table function, routine, 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 program
- A program that
a user supplies and defines.
-
user-defined report
- A report that
a user provides their own SQL statements to query the data center model database.
-
user-defined structured type
- See structured type.
-
user-defined type (UDT)
- (1) 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.
- (2) See distinct type.
-
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 descriptor
- There are three types
of user descriptors: installation-created, DFSUSER, and node user. DFSUSER
and node user descriptors are created from system definition options; installation-created
descriptors are created in the installation process. See also ETO descriptor.
-
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) 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.
- (2) A point in a program at which a user exit routine
may be given control.
- (3) A customized routine that takes control
at a specific point in an application. See also installation
exit.
-
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.
-
user exit profile
- A profile that
defines a user-provided program or exit routine to Data Interchange Services.
-
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.
-
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) See customer group.
- (2) A group consisting of one or more defined
individual users, identified by a single group name.
- (3) A group of
users in an installation who represent a single department or function within
the organization. See also system operator, storage administration group.
-
user group representative
- A person
within a user group who is responsible for representing the user group's interests
in negotiations with the storage administration group.
-
user heap
- See initial heap.
-
user ID (uid)
- (1) See user identification.
- (2) See user identifier.
-
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 (UID, user ID)
- (1) The name used to associate the user profile with a user when a user signs
on to a system.
- (2) 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.
- (3) In the UNIX operating system, a string that
uniquely identifies each user to the operating system.
- (4) A file
assigned to every user and server that uniquely identifies them to Lotus Notes
and Domino.
-
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 (uid, user ID)
- (1) A
string of characters that uniquely identifies a user to a system.
- (2) In a privacy management environment, a user key that the PII owner is likely
to know the value of. See also user key.
-
user index
- In i5/OS 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 interface (UI)
- The hardware,
or software, or both that enables a user to interact with a system, program,
or device.
-
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
- (1) 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.
- (2) A storage key that can
be used by processes when running in user mode (as opposed to kernel node).
-
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 library
- A private print-resource
library owned by an individual user, accessed only when the name is specified
by the owner in the JCL USERLIB parameter. See also system library.
-
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. See also user option.
- (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 message table
- A table of messages
generated by the user and used by certain user written edit routines.
-
user name
- (1) A string of characters
that uniquely identifies a user to a system. See also user identification.
- (2) 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 number (UID)
- In UNIX systems,
a number that uniquely identifies a user to the system. The UID is the internal
number associated with a user ID.
-
user option
- In a federated system,
a parameter of the CREATE USER MAPPING or ALTER USER MAPPING statement 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 pool
- An optional storage pool
that contains blocks of data that compose the files that are created by SAN
File System clients. See also default user pool, storage pool.
-
user port
- In IP PrintWay, a port
address that is outside the range of predefined addresses.
-
user printable area (UPA)
- The area
within the valid printable area (VPA) where user-generated data can print
without causing an exception condition. See also valid
printable area.
-
user profile
- (1) 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.
- (2) In LearningSpace - Virtual Classroom, a collection
of permissions that control access to the product's features and functionality.
- (3) 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.
- (4) 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.
- (5) An entity such as a department or customer for
whom services are being performed.
-
user profile name
- The name or code
that the system associates with a user when the user signs on the system.
-
user queue
- In i5/OS 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 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.
- (2) A database of known users and user-provided information that is used for authentication
purposes.
-
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 module (URM)
- See user-replaceable program.
-
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.
-
user shell
- An interactive shell.
The user's CICS application program runs directly under this CICS facility.
-
user space
- In i5/OS 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 spool access method (USAM)
- Data management routines that do not execute in the address space, but provide
the subsystem interface for various functions of user data sets.
-
user stack
- An independent area of
stack storage that may be located above or below 16 MB, designed to be used
by both library routines and compiled code.
-
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 storage pool
- A storage pool
containing the blocks of data that make up user files.
-
user structure
- A set of control blocks,
including a user block and one or more LTERM blocks. The message queues are
associated with the dynamic user, as opposed to the physical terminal, and
they are queued to the user ID.
-
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 a System i finance job.
- (3) An installation-defined table that is used to extend, modify, or delete the
default processing specifications. See also table pair.
-
user temporary table space
- A temporary
table space that is used to store declared temporary tables. A user temporary
table space is not created by default when a database is created. See also
temporary table space.
-
user time
- In UNIX, the time spent
executing database manager code.
-
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 a business requires.
-
user volume
- A volume, assigned to
a user, that can contain any data and can be rewritten as many times as the
user wishes until the volume expires.
-
user-written condition handler
- A
routine that analyzes and possibly takes action on conditions presented to
it by the condition manager.
-
uses relationship
- (1) 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.
- (2) A concept of one component depending upon another
component. For example, when installing components, the prerequisite and corequisite
components are used by other components, which have a uses relationship with
the prerequisite and corequisite components.
-
USS
- See unformatted
system service.
-
UTC
- See Coordinated
Universal Time.
-
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. See also UCS-2, UTF-8.
-
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. See also UCS-2, UTF-16.
-
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 control facility (UCF)
- An
optional facility that provides a method of performing most database utility
and maintenance operations in preparation for recovery and reorganization.
-
utility device
- The ESA/390 term for
the device used with Extended Remote Copy (XRC) to access information that
describes the modifications performed on the source copy.
-
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 program
- A computer program
in general support of computer processes; for example, a diagnostic program,
a trace program, a sort program.
-
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.
-
utility volume
- A volume that is available
to be used by the extended remote copy (XRC) function for maintenance purposes.
The utility volume accumulates change data from the source that is used by
the data mover software to update the target volume.
-
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.
-
UTP
- See unshielded
twisted pair.
-
UTS
- See update
time stamp.
-
utterance
- A spoken word, phrase,
or sentence that can be preceded and followed by silence.
-
UUID
- (1) See Universal
Unique Identifier.
- (2) See Universally Unique
Identifier.
|
|
|
| | |
