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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.

table
(1) 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.
(2) A named data object that consists of a specific number of columns and some unordered
rows. See also view.
(3) An orderly arrangement of data in rows and columns that can contain numbers,
text, or a combination of both. The system-recognized identifier for the object type is *TBL.
(4) In COBOL, a set of logically consecutive data items that are defined in the Data Division
with the OCCURS clause.

table builder services message (TBSM)
A message issued by a table builder module.

table check constraint
See check constraint. See also unique constraint, informational constraint.

table collocation
In a partitioned database environment, a state that occurs when two tables are stored
in the same database partition group and that have the same number of compatible
partitioning keys. When this happens, DB2 Universal Database can choose to 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
A column name qualifier that designates a specific object table.

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 simple query. For example,
a table expression might be a query that selects all 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
(1) A function that optionally accepts arguments and that returns a table to the
SQL statement that references it. Table functions can be referenced only in the FROM clause.
See also aggregate function, function, scalar function, row function.
(2) A function that receives a set of arguments and returns a table to the SQL statement
that refers to the function. A table function can be referenced only in the FROM clause
of a subselect. See also aggregate function, row function.

table locator
In DB2 Universal Database for z/OS and OS/390, a mechanism that allows access to
trigger transition tables in the FROM clause of SELECT statements, the subselect of
INSERT statements, 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 the data from the source CD table, then applies the data (one member at
a time) to each target table, and finally commits its work. See also transaction-mode processing.

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 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)
(1) In a 3800 Printing Subsystem, a numeric character corresponding to the order in which the
names for the character-arrangement table have been specified.
(2) An optional control character in a print data set. The TRC identifies the font used to print
the record and can be used to select a font during printing.

table space
(1) An abstraction of a collection of containers in which database objects are stored. A table
space provides a level of indirection between a database and the tables stored within the database.
The data, index, long field, and LOB portions of a table can be stored in the same table space,
or can be individually broken out into separate table spaces.
(2) In DB2 Universal Database for z/OS and OS/390, a page set that is used to store the
records in one or more tables.

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 set
In DB2 Universal Database for z/OS and OS/390, a set of table spaces and partitions that
should be recovered together if each contains a table that is a parent or descendent of a table
in one of the others, or the set that contains a base table and associated auxiliary tables. A table
space set can contain both types of relationships.

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.

tag
(1) In OSI, a type designation that is associated with every ASN.1 type.
(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. (I) (A)
(3) An element of the tag language. Tags indicate actions to be taken when the tag
language file is imported to the information catalog.
(4) 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.
(5) In UIM, the statements of the UIM tag language. Tags describe the actions, format,
and data of the panel. Tags are used to define the formatting of help information.

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 property,
constraint, stereotype.

Tag Image File Format-Fax (TIFF-F)
A graphic file format used to store and exchange scanned fax images.

tag language
A format for defining object types and objects, and actions to be taken on those object
types and objects, in the Data Warehouse Center or the information catalog.

tag language file
A file that contains tag language that describes objects and object types to be added, updated
or deleted in the Data Warehouse Center or in the information catalog, when the file is imported.
In the Information Catalog Center, a tag language file is produced when you transfer a delete
history log, or extract descriptive data from another database system using an extract program.

taglet
A program written in the Java programming language that implements the Taglet API.
Information taken from: http://java.sun.com/j2se/1.4/docs/tooldocs/javadoc/taglet/overview.html
See also doclet.

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)

tag prefix
The prefix for a requirement type. A tag is a unique identifier assigned to each requirement
you create. The tag prefix can be up to 20 characters long, and it is defined as a part of the
requirement type.

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 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
In the GDDM function, the single point at which a straight line meets a curve or surface.

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 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 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 library
A device that includes a selection of cartridges in a common (secure) area within access of
one or more automated removable media (ARM).

tape mark
A unique mark written on the tape to distinguish file boundaries.

tape reel
A round device on which magnetic tape is wound.

tape unit
The physical enclosure containing the tape drive.

tape volume
A reel of magnetic tape.

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
Abbreviation for Trans-European Automated Real-Time Gross Settlement Express Transfer,
which is an RTGS payment system composed of one RTGS system in each of the countries which
participate in stage three of the EMU and 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.

target
(1) In the Data Warehouse Center, a table, view, or file that is produced or populated by a step;
the output of a step. See also source.
(2) The final destination for an action or operation.
(3) In VisualAge RPG, a part that receives a target event from a source part whenever the state of
the source part changes.
(4) 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).
(5) The program or system to which a request for files or processing is sent.
(6) In Tivoli Software Distribution, Version 4, a workstation on which the actions defined in a
software package are executed.

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 catalog entry
A promotional product or SKU that is defined as a merchandising association.
See also source catalog entry.

target data queue program
In iSeries 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.

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 group
In the Application Development Manager feature of the Application Development ToolSet
licensed program, the final group to which a part can be promoted.

target host
See task endpoint.

target library high-level qualifier (thlqual)
A high-level qualifier for z/OS target data set names.

target namespace
A unique logical location for information about the service that associates a namespace with
a WSDL location.

target program
(1) In VisualAge RPG, the object to be built by the project, such as a Dynamic Link Library (DLL).
(2) In communications, the program that is started on the remote system at the request of the
source system. See also source program.
(3) In display station pass-through, a program that runs on the remote system.

target queue manager
See remote queue manager. See also local 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) In upgrades, the version, release, and modification level of software that is to be installed.
(2) 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.

target server
(1) In SQL replication, a database or subsystem that contains replication target tables, views,
or stored procedures.
(2) In upgrades, the planned hardware configuration and software level that exists when the
upgrade is completed.
(3) In Q replication, a database or subsystem that contains replication target tables or stored
procedures. See also Q Apply server.

target service
A service that exists outside of the gateway.

target system
(1) In upgrades, the planned hardware configuration and software level which will exist when
the upgrade is completed.
(2) The system that receives information in a network of systems that exchange objects and data.
(3) In a distributed data management (DDM) network, the system that receives a request from
an application program on another system to use one or more files located on the target system.
(4) A system that currently owns a mirror copy of an independent ASP in a cross-site mirroring
(XSM) environment. Changes to the production copy of an independent disk pool on the source
system are replicated to each mirror copy of the independent disk pool that exists on
target systems.
(5) The system that receives a request from another system to establish communications.
See also source system.

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 zone
(CICS Transaction Server only). SMP/E term for the structure and contents of a set of target
system libraries that are created during system generation and from which CICS is run.

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 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.
(2) An activity that has business value, is initiated by a user, and is performed by software.
See also job.
(3) A smaller work assignment within a Lotus Workflow activity. Up to seven tasks, optional
or required, can be defined in the activity properties. Resources such as forms or programs
can be assigned to tasks. These resources are available by clicking a button in the cover document.
(4) In the Task Center, a unit of work and its associated schedule and task actions. Tasks can be
set to run on schedules and can perform various actions based on the success or failure of the
task. DB2 Universal Database scripts, operating scripts, and warehouse steps are all examples
of tasks. See also step, task action.
(5) The basic building blocks in the model. Each task performs some function (does something).
Visually, a task represents the lowest level of work that can be portrayed in a process.
(6) A basic unit of work to be accomplished by a device or a person.
(7) In CICS, a single instance of the execution of a transaction.
(8) A unit of work representing one of the steps in a process.

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." 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, you can create a task category named "Payroll" then group all
payroll-related tasks in the Payroll category.

Task Center
The DB2 Universal Databaes 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. A task
command is not targetable, meaning it is always executed in the same container as the controller
command. 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 TCB)
(1) In CICS/VSE, a VSE control block. A TCB is created for each VSE task.
(2) A control block that is used to communicate information about tasks within an address
space that are connected to DB2 Universal Database for z/OS and OS/390. An address
space can support many task connections (as many as one per task), but only one address
space connection.
(3) A z/OS control block used to communicate information about tasks, within an address space,
that are connected to a z/OS subsystem such as WebSphere MQ for z/OS or CICS.

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 endpoint
In a Tivoli environment, the agent that is the ultimate recipient for any type of Tivoli operation.

Taskguide
A function of the configuration tool that provides step-by-step guidance to configuring your CICS
Transaction Gateway.

task library
In a Tivoli environment, a container in which a Tivoli administrator can create and store
tasks and jobs.

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
(1) A third party application that provides support for planning and management of projects or
processes in Lotus Notes. It integrates Notes Mail, Calendars and To Do\x{2019}s with team-based
task management capability. http://www.developer.ibm.com/solutions/isv/igssg.nsf/
AllSolutionsbyID/86256B7C0019CE5B86256BDC0065DE95?OpenDocument
(2) In the Windows operating system, the function that controls the starting and stopping
of programs.

taskpad
In iSeries Navigator, a view of system tasks that lets a user interact with OS/400 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 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. In WebSphere MQ for
z/OS, the task switcher optimizes performance by allowing some MQI calls to be executed under
subtasks rather than under the main CICS TCB.

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
An organization's classification of knowledge topics. In Discovery Server, the K-map displays
an organization's taxonomy. Using the K-map, users can browse and search the taxonomy for
information. Using the K-map editor, editors can customize the taxonomy.

tax type
Indicates the type of tax; either sales or shipping. Each tax type has its own unique set of
tax categories.

TB
See terabyte.

Tb
See terabit.

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.

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 channel
A type of channel within a transport chain that provides client applications with persistent
connections within a local area network (LAN).

TCP/IP
See Transmission Control Protocol/Internet Protocol.

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 monitoring server
A run-time 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.

TCS
See terminal control system entry.

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.

TDD
See Telecommunications Device for the Deaf.

TDDM
See target distributed data manager.

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.

team workspace
In Lotus Workflow, in the application database, a view that shows all binders for which a user is
a team member or for which a user is the activity owner and other team members have been
assigned.

TEB
See terminal error block.

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.

technical metadata
In the Data Warehouse Center, data that describes the technical aspects of the data, such as
its database type and length. Technical metadata includes information about where the data
comes from and the rules used to extract, clean, and transform the data. Much of the metadata
in the Data Warehouse Center is technical. See also business metadata, information catalog.

technology
A program, external to DirectTalk, that provides processing for functions such as text-to-speech
or speech recognition.

technology connector
A connector that is designed for interactions that conform to a specific technology.
The WebSphere Business Integration Adapter for XML, for example, can be an intermediary
through which an integration broker sends data to a web server (or other programmatic entity)
using the XML format, even if that web server resides on a network that is not running a
WebSphere business integration system.

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 end-point identifier.

telecommunication
(1) The transmission of data between computer systems over telecommunication lines and
between a computer system and remote devices.
(2) The transmission of control signals and information between two or more locations, such
as by telegraph, radio, or television.

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 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 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, an application protocol that allows a user at one site to access a remote system
as if the user's display station were locally attached.

template
(1) 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.
(2) A predefined structure for an artifact.
(3) A special object used to create new objects of the same type. The newly created object has
the same characteristics as the template.
(4) In Notes/Domino, a design that you can use as a starting point for a new Notes database.
If it is a design template, it will update database design elements created from the template.
(5) 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.
(6) 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.
(7) 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.
(8) In a z/OS or OS/390 environment, a DB2 Universal Database utilities output data set
descriptor that is used for dynamic allocation. A template is defined by the TEMPLATE
utility control statement.
(9) In Lotus Learning Management System, a standard layout used in such system
communications as e-mail, approval requests, and error messages.
(10) A HATS resource that describes the relatively static portion of the Web pages presented
by the HATS application, including a banner and navigation area.
(11) 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.

template-based content
See structured content.

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 library
The database, known as the Portal Template Catalog, that stores place template specifications
and portlets forms, subforms, and profiles.

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 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
In Notes/Domino, a field used during calculations. It is not stored.

temporary file system
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)
The CICS facility that allows application programs to store data in a temporary storage
queue for later retrieval.

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. See the CICS Transaction Server System Definition Guide or the CICS/VSE System
Definition and Operations Guide for more information.

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. For example, 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.

temporary table space
A table space that can store only temporary tables.

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.

TEP
See terminal error program.

terabit (Tb)
(1) For processor storage, real and virtual storage, and channel volume, 240 or
1 099 511 627 776 bits.
(2) For disk storage capacity and communications volume, 1 000 000 000 000 bits.

terabyte (TB)
(1) 1 099 511 627 776 bytes. In OS/400, a terabyte is represented by the value, *MAX1TB, which is
the maximum size of auxiliary storage that is allowed for an access path associated with a file.
(2) 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
A string, symbol, or function call contained within a REXX expression.

terminal
(1) In a system or communications network, a point at which data can either enter or leave.
(2) In data communication, a device, usually equipped with a keyboard and display device,
capable of sending and receiving information.
(3) The point at which one node in a message flow is connected to another node.
Terminals enable you to control the route that a message takes, depending whether the
operation performed by a node on that message is successful.

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 entry (TCS)
A table defining the connections between CICS systems.

terminal control table ( TCT TCT)
(1) A table describing the terminals and logical units within a CICS network.
(2) CICS control table retained to define non-VTAM terminal networks.

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 (TCTTE, TCTE)
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 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 end-point identifier (TEI)
A number to identify the end point 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 iSeries 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. For programming information,
see the Recovery and Restart Guide.

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 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 servlet
A Java program that allows you to use a Web browser as an emulator for a 3270 CICS
application running on any CICS server.

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.

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 notification
A pending event that is activated when a CICS subsystem successfully connects
to WebSphere MQ for z/OS.

termination phase
The XRF phase in which the XRF complex returns to two separate and independent
environments and all XRF activity in the alternate system stops.

terminology management system
A database of specialist words for a subject area or areas used to facilitate high quality human
or computer-aided translation. This definition is from the Localisation Industry Standards
Association (LISA) Glossary.

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 DB2 Universal Database 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
In communications, a data link command or response used to perform a basic test of the
station-to-station link connection.

test case
A set of tasks, scripts, or routines that automate the task of testing software.

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 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 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 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 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 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 attribute
In the GDDM function, characteristics of chart information, such as the color or type style.

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 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 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 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-to-speech (TTS)
The process by which ASCII text data is converted into synthesized speech.

text transparency
In 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.
Transmission control characters sent in the data are treated as specific bit patterns, unless
they are preceded by the DLE control character.

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.

TFTP
See Trivial File Transfer Protocol.

TG
See transmission group.

TGS
See ticket-granting service.

TGT
See ticket-granting ticket.

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
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.

thesaurus service programming interface (thesaurus SPI)
A command-line-based thesaurus utility tool that is included with Discovery Server and that
provides a custom thesaurus for assistance in Discovery Server searches. The thesaurus,
which resides on the server machine and supports ASCII text, is shared by all users.

thesaurus SPI
See thesaurus service programming interface.

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.

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 iSeries Navigator, the support that allows users to install software from different vendors.

this
In object-oriented programming, a keyword that identifies a special type of pointer that references
the class object in a member function.

thlqual
See target library high-level qualifier.

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) A stream of computer instructions that is in control of a process. A multithread process
begins with one stream of instructions (one thread) and may later create other instruction
streams to perform tasks.
(2) In the Integrated Language Environment (ILE), the basic line of the running of a program.
(3) In CICS Transaction Server, a link between a CICS application and DBCTL. To DBCTL,
a thread represents the CICS transaction that has issued a DL/I request. The system
initialization parameter DLTHRED specifies the number of threads provided through the
CICS local DL/I interface.
(4) In some operating systems, the smallest unit of operation to be performed in a process.
(5) A connection between a CICS transaction and DB2.
(6) The database manager structure that describes an application's connection, traces its
progress, processes resource functions, and delimits its accessibility to the database manager
resources and services. Most DB2 Universal Databse for z/OS and OS/390 functions execute
under a thread structure.
(7) The basic unit of program execution. Several threads can run concurrently,
performing different jobs.

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 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)
See thread-specific storage.

thread private storage
See thread-specific storage.

threadsafe
(1) A conditional form of thread safety.
(2) 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.

thread-specific storage
Storage that is not shared among threads, but can be accessed by all functions within that thread.
In the industry, also called thread private storage, thread local storage, or TLS.

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, authorization identifier,
and an object name, separated by periods.

threshold
(1) 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.
(2) 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.
(3) 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.
(4) 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 is raised.

threshold analysis
In Backup Recovery and Media Services, the comparison of actual media statistics to standard
industry statistics for that media.