A free-standing framework
that holds the devices and card
enclosure.
rack configuration list
A list of
all of the equipment within the rack and the logic cards within the card
enclosure.
rack stabilizer
A plate that
holds the rack stable or steady when a device is pulled out for
service.
RACL
See Random Automated
Cartridge Loader (RACL).
radio button
A circle with text
beside it. Radio buttons are combined to show a user a fixed set of
choices from which only one can be selected. The circle is partially
filled when a choice is selected.
radix-tree index
In DB2 UDB for
AS/400, an object that provides random access to rows in a database
table. See also encoded-vector index and
index.
RAID
See Redundant Array of
Independent Disks (RAID).
RAID-5
The RAID method used by
the high-performance models of the IBM 9337 Disk Array Subsystem. See
also Redundant Array of Independent Disks (RAID) and device
parity protection.
rails
Hardware attached inside
the rack to install the devices.
RAM
See random access memory
(RAM).
RAMP-C
A generic commercial
interactive application that IBM designed to measure and compare system
performance capabilities.
random access
In COBOL, an access
method in which the program-specified value of a key data item identifies the
logical record that is obtained from, deleted from, or placed into a relative
or indexed file.
random access memory (RAM)
A
storage device in which data can be written and
read.
Random Automated Cartridge Loader (RACL)
A
cartridge loader that includes individual drives that can have their own
facility to use an automated tape library.
random by key
A processing method
for files in which the value in the key field identifies the records to be
processed.
random by relative record number
A
processing method for files in which relative record numbers identify the
records to be processed.
random number
In Cryptographic
Support, a number obtained by chance. Contrast with pseudorandom
number.
random processing
A method of
processing in which records can be read from, written to, or deleted from a
file order requested by the program that is using them. See also
consecutive processing and sequential
processing.
raster pattern
In AFP support, a
series of pels arranged in scan lines. The toned or untoned status of
each pel creates an image. A digitized raster pattern is an array of
bits. The on or off status of each bit determines the toned or untoned
status of each pel.
rational number
A real number
that is the quotient of an integer divided by an integer other than
zero.
RBR
See rollback required
(RBR).
RC
A
REXX special variable set to the return code from any executed host command or
subcommand. It is also set to the return code when the conditions
ERROR, FAILURE, and SYNTAX are trapped.
RCB
See record control byte
(RCB).
RCD
See read cache device
(RCD).
RCMS
See remote change
management server (RCMS).
RCS
See remote controlling
system (RCS).
RDB
See relational database
(RDB).
RDB directory
The directory where
remote databases in the network are registered. Information in a
directory tells the system which communications parameters to use to connect
to a remote database. The RDB directory also contains the name of the
local database.
RDBMS
See relational
database management system (RDBMS).
RDN
See relative
distinguished name (RDN).
RDO
See resource definition
online (RDO).
read access
In DCE Cell Directory
Service (CDS), an access right that grants the ability to view
data.
read authority
(1) A data authority
that allows the user to look at the contents of an entry in an object.
See also add authority, delete authority, execute
authority, and update authority.
(2) An authority subset that
allows the user to read entries in an object. The system-recognized
identifier is *R. *R authority combines object operational authority
and read authority.
read cache device (RCD)
A volatile
solid-state disk that is optimized for use as memory for the extended adaptive
cache.
reader
(1) An internal program that
reads jobs from an input device or a database file and places them on a job
queue.
(2) In RJE, a program that reads jobs
from a database file or interactive display station and sends them to the host
system.
read/execute authority
An object
authority that allows the user to read entries in an object, run a program,
and search a library or directory. Read/execute authority combines
object operational authority, read authority, and execute authority.
The system-recognized identifier is
*RX.
read-from-invited-program-devices operation
An input
operation that waits for input from any one of the invited program devices for
a user-specified time. Contrast with read-from-one-program-device
operation.
read-from-one-program-device operation
An input
operation that will not complete until the specified device has responded with
input. Contrast with read-from-invited-program-devices
operation.
read-only memory (ROM)
Memory in
which stored data cannot be changed by the user except under special
conditions. See also
CD-ROM.
read-only replica
In DCE Cell
Directory Service (CDS), a copy of a CDS directory in which applications
cannot make changes.
read operation
An input operation
that obtains data from a file or device and passes it to a
program.
read stability
In DB2 UDB for
AS/400, an isolation level similar to repeatable read, but read stability does
not completely isolate an application process from all other application
processes that are running concurrently. At the read stability level,
an application that issues the same query more than once might read additional
rows (phantom rows) that were inserted and committed by an application process
that is running concurrently. See also cursor stability,
repeatable read, and uncommitted
read.
read/write authority
An object
authority that allows the user to add, change, delete, and read entries in an
object. Read/write authority combines object operational authority,
read authority, add authority, update authority, and delete authority.
The system-recognized identifier is
*RW.
read/write/execute authority
An object
authority that allows the user to add, change, delete, and read execute
entries in an object, run a program, and search a library or directory.
Read/write/execute authority combines object operational authority, read
authority, add authority, update authority, delete authority, and execute
authority. The system-recognized identifier is
*RWX.
read/write head
The data sensing
and recording unit of the diskette drive or tape
drive.
realm
In the Distributed
Computing Environment (DCE), in Kerberos specifications, a cell that is
considered exclusively from the point of view of security. The term
cell designates the basic unit of DCE configuration and administration and
incorporates the notion of a realm.
real-time
Pertaining to the
processing of data by a computer in connection with another process outside
the computer according to time requirements imposed by the outside
process. This term is also used to describe systems operating in
conversational mode and processes that can be influenced by human intervention
while they are in progress. (I) (A)
reason code
In MQSeries, a return
code that describes the reason for the failure or partial success of an
Message Queue Interface (MQI) call.
reassembly
In OSI, a function
performed by an (N)-entity to map multiple (N)-protocol-data-units into one
(N)-service-data-unit. Reassembly is the opposite of segmenting.
Contrast with segmenting.
reassign
To mark a disk sector as
damaged. The marked disk sector points to another sector location where
the data from the damaged sector is moved.
rebind
(1) In DB2 UDB for AS/400, the
creation of a new access plan for a program that was previously bound.
If, for example, an index is added for a table that is used by an application
program, DB2 UDB for AS/400 can automatically bind the application program
again to take advantage of that index.
(2) To request renewal of a lease
from a server on a particular
network.
rebuild maintenance
A method of
maintaining keyed access paths for database files. This method updates
the access path only while the file is open, not when the file is closed;
the access path is rebuilt when the file is opened. Contrast with
immediate maintenance and delayed
maintenance.
received line signal detector (RLSD)
A signal
defined in the EIA-232 standard that indicates to the data terminal equipment
(DTE) that it is receiving a signal from the remote data circuit-terminating
equipment (DCE).
receive mode
A time during which
the BSC adapter looks for synchronization characters, and stores the data
characters in main storage.
receive not ready (RNR)
In
communications, a data link command or response that indicates a temporary
condition of being unable to accept incoming
frames.
receiver
(1) See journal
receiver.
(2) In hardware, a functional unit
that converts small electronic signals to signals that control a
device.
receiver chain
The journal
receivers presently or previously attached to the same journal. Each
journal receiver, except the first one, has a previous receiver that was
attached before the current receiver. Each journal receiver, except the
currently attached receiver, has a next
receiver.
receiver chain break
A logical
break in a receiver chain.
receiver directory
Summary
information about the journal receivers that are or were attached to the
specified journal and are still known to the
system.
receive ready (RR)
In
communications, a data link command or response that indicates that a station
is ready to receive protocol data units. Receive ready also
acknowledges receipt of protocol data
units.
receive time-out
In data
communications, the result of no data being received in a given period of
time.
receiving cross-domain key
In
Cryptographic Support, a cross-domain key used to decrypt a data-encrypting
key that was encrypted by another location.
receptacle
A hollowed electrical
fitting that contains the live parts of a
circuit.
recipient
In the OfficeVision
program, the user to whom mail is sent.
recipient address
A string of
data that represents the address associated with the recipient of the
message. The contents and format of the string are not defined by the
mail server framework. The address type associated with the recipient
address is assumed to define the contents of the recipient address
field.
recipient history tree
A
structure that represents the changes to the recipient list, so that a
recipient can be traced back to the recipient entry in the original recipient
list passed using the Create Mail Message application program interface
(API).
recombining
In OSI, a function
performed by an entity that is the reverse of splitting.
Recommendation X.21
A document,
CCITT Recommendation X.21, that outlines standards for a
general-purpose interface between data terminal equipment (DTE) and data
circuit-terminating equipment (DCE) for synchronous operations on a public
data network.
Recommendation X.21 bis
A document,
CCITT Recommendation X.21 bis, that outlines standards for the
interface between data terminal equipment (DTE) and V-series data
circuit-terminating equipment (DCE) for synchronous operations on a public
data network.
Recommendation X.25
A document,
CCITT Recommendation X.25, that outlines standards for the connection
of processing equipment to a packet-switching data
network.
Recommendation X.31
A document,
CCITT Recommendation X.31, that outlines standards for the X.25
protocol over integrated services digital networks
(ISDNs).
record
(1) A group of related data,
words, or fields treated as a unit, such as one name, address, and telephone
number.
(2) In COBOL, the most inclusive data
item. The level-number for a record is 01. A record can be
either an elementary item or a group
item.
record address file
In RPG, an
input file that indicates which records are to be read from another file and
the order in which the records are to be
read.
record area
In COBOL, a storage
area in which a record described in a record description entry in the File
Section is processed.
record control byte (RCB)
In
multileaving telecommunications access method (MTAM), a control character used
to identify each record type within a transmission
block.
record description entry
In
COBOL, the total set of data description entries associated with a particular
record.
record format
A named part of a
file that identifies records of a specified record format
description.
record format definition
In IDDU,
information that describes the arrangement or layout of fields in a
record. A record format definition resides in a data dictionary.
See also field definition and file
definition.
record format description
A
description of the characteristics of the fields (for example, type and
length) and the arrangement of the fields in a record created by the
user.
record ID code
See record
identification code.
record identification code
Characters
placed in a record to identify the record
format.
record identifying indicator
An
indicator that identifies the record just
read.
record key
(1) In COBOL, a key field
whose contents identify a record within an indexed file.
(2) In RPG, all the key fields
defined for the record type.
record layout
In AFP Utilities, a
part of the printout format definition that defines how each field of a
database file record is formatted and printed by the print format
utility. See also page
layout.
record level specifications
Data
description specifications coded on the same line as a record format name or
on lines immediately following a record format name (until the first field is
specified). See also field level specifications, file
level specifications, key field level specifications,
help level specifications, join level specifications,
and select/omit level
specifications.
record-name
In COBOL, a
user-defined word that names a record described in a record description entry
in the Data Division of a COBOL program.
record number
In COBOL, the
ordinal number of a record in the file whose organization is
sequential.
record selection
The process of
selecting particular records from a file and including the information from
the records, for example, in a report.
record separator
In BSC, a
control character used to indicate the end of one record and the beginning of
another.
record type
The classification of
records in a file. Records of the same type have the same fields in the
same order. For program-described files, these records have record
identification codes; for externally described files, the records have
the same record format name.
recoverability
The degree or
extent to which the system can be restored to an operational condition after a
system failure.
recovery
(1) The process of
rebuilding databases after a system failure.
(2) In Backup Recovery and Media
Services, the process of locating and restoring data in the event of partial
or total data destruction. The recovery service automatically locates
the correct media to be restored based on user-defined media management and
recovery requirements.
recovery domain
A subset of nodes
in a cluster that are grouped together for a common purpose, such as
rebuilding databases after a system failure. A domain represents those
nodes of the cluster where cluster resource exists.
recovery library
The library
containing information related to recovery of database operations from system
failures. Named QRECOVERY.
recovery policy
In Backup
Recovery and Media Services, a policy that defines the default controls and
values to be used in recovery
operations.
recurring attribute
In the
Distributed Computing Environment (DCE), an attribute with several attribute
values.
recursion
A programming technique
in which a program or routine calls itself to perform each successive step in
the solution of a problem and uses the output returned from this call in
completing the current step.
recursion level
The position of a
program in a call stack. The first occurrence of a program in a job has
a recursion level of 1, the second occurrence of the same program has a
recursion level of 2, and so on.
recursive
Pertaining to a program
or routine that calls itself after each run until it is
interrupted.
recursive mutex
A read/write lock
that is acquired again by the owning thread.
recursive procedure
An active
procedure that can be called from within itself or from within another active
procedure.
recursive program
A program that
can call itself, or be called by another program, and repeat indefinitely
until a specified condition is
met.
reduced instruction set computer (RISC)
A
computer that uses a small, simplified set of frequently used instructions for
rapid processing. Contrast with complex instruction set computer
(CISC). See also
PowerPC.
Redundant Array of Independent Disks (RAID)
A method
of protecting data loss due to disk failure based on the Redundant Array of
Independent Disks specification published by the University of California in
1987. See also device parity
protection.
reentrant
A program that is
serially reusable. Each time the user enters the program, a fresh copy
of working storage is provided. If any values need to be saved, the
user must save them in other storage areas or
files.
reference
In VisualAge RPG,
information from a physical source file that may be extracted at build
time. Any changes made to the original source must be recompiled to
reflect the changes at run time.
reference area
In the
OfficeVision program, text shown above or beside a table column when the
column is being changed or inserted.
reference code
The four-character
name of a status or error
condition.
reference code translation table
An
object that contains reference code and field-replaceable-unit (FRU) code
records. These records are used to report hardware errors and do
problem analysis and resolution. The system-recognized identifier for
the object type is *RCT.
reference diskette
A diskette
that contains the information about the configuration of a Personal System/2
system (PS/2).
referenced window record
In DDS,
a record containing the WINDOW keyword that identifies the name of a window
definition record.
reference format
A format that
provides a standard method for describing COBOL source
programs.
reference line
In Business
Graphics Utility, a straight line parallel to either the vertical or
horizontal axis relative to which data values are plotted on a chart.
Sometimes called a translated axis
line.
reference modification
In the
COBOL licensed program, a method of establishing and referring to a data item
by specifying a leftmost character position and length within a character
string.
reference modifier
In COBOL, the
leftmost character position and the length of a character string used to
establish and refer to a data item.
reference modify
To establish and
refer to a COBOL data item by specifying a leftmost character position and
length within a character string.
reference monitor
In the
Distributed Computing Environment (DCE), code that controls access to an
object.
reference number
In the
OfficeVision program, a number assigned to an item on the calendar.
Contrast with footnote reference
number.
reference phrase
The text that is
highlighted and preceded by a single-character input field used to signify the
existence of a hypertext link.
reference pointer
In DCE Remote
Procedure Call (RPC), a non-null pointer whose value is invariant during a
remote procedure call, and cannot point at aliased
storage.
referential constraint
The rule
that the non-null values of the foreign key are valid only if they also appear
as values of a parent key. The referential constraint is always defined
from the dependent file's
perspective.
referential cycle
(1) A sequence of
constraint relationships in which a descendent of a parent file becomes the
parent to the original parent file. Synonymous with constraint
cycle.
(2) In DB2 UDB for AS/400,
a set of referential constraints such that each table in the set is a
descendent of itself.
referential integrity
The state
of a database in which all values of all foreign keys are valid. Each
value of the foreign key must also exist in the parent key or be
null.
referral
In the Lightweight
Directory Access Protocol (LDAP), a pointer from one LDAP directory server to
another.
reflective marker
See
marker.
refresh
In DataPropagator
Relational, a process in which all of the data in the user table is copied to
the target table. This data may replace existing data or be appended to
existing data.
register
(1) A storage area having a
specified storage capacity and usually reserved for a special purpose.
(2) In the Distributed Computing
Environment (DCE), to place server-addressing information into the local
endpoint map. Also, to insert authorization and authentication
information into binding information
(3) In DCE Remote Procedure Call
(RPC), to list an RPC interface with the RPC run time. See
endpoint map and RPC interface.
(4) In the hierarchical file
system, to make an underlying file system and the specific functions it
supports known to the application programming interface layer and accessible
to user applications.
registered enterprise-unique identifier
A name
given to an entire network that makes the network unique among other networks,
including IBM networks. New users are requested to register the network
name with IBM if they plan to communicate with IBM networks (for PTF
information, for example).
registered filter
A filter that
allows more than one active filter for alerts and problem logs. When a
filter is registered, the AS/400 system can send notification of events to a
data queue. Registered filters behave slightly different than filters
exposed through the network attributes or system value
commands.
registrar
In DataPropagator
Relational, a person who registers source
tables.
registration
(1) In DataPropagator
Relational, the act of identifying a source table to make it available for
subscription.
(2) In OSI, the process of
obtaining identifiers for objects from the appropriate naming
authorities. Registered identifiers should be obtained for the
following objects, which relate to OSI Communications Subsystem
operations: (a) NSAP addresses, (b) DTE addresses, (c) abstract
syntaxes, (d) application contexts, and (e) application entities.
(3) In X.25, the process
used between a DTE and a DCE to establish an agreement on which optional user
facilities will be in effect. For example, the DTE can request that the
DCE agree to or stop a previous agreement for an optional user
facility. Also, a DCE can indicate which optional user facilities are
available or which optional user facilities are currently in effect.
The negotiation is accomplished through the exchange of registration
packets.
registration facility
A service
that provides storage and retrieval operations for OS/400 and non-OS/400 exit
points and exit programs.
registration facility repository
The
repository that contains information about the OS/400 and non-OS/400 exit
points and exit programs.
Registry database
In DCE
Security, a database of security information about principals, groups,
organizations, accounts, and security
policies.
Registry replica
In DCE Security,
a read-only instance of a Registry
database.
Registry Service
One of the three
services provided by the DCE Security Service, the Registry Service manages
information about principals, accounts, and security policies. The
other services are the Privilege Service and the Authentication
Service.
REJ
See reject
(REJ).
reject (REJ)
In communications, a
data link command or response used to request the resending of information
frames.
rejoin
To become an active member
of an entity after having been a nonparticipating member.
relational character
In COBOL,
one of the characters that express a relationship between two operands:
= (equal to), > (greater than), < (less
than).
relational checking
(1) The
evaluation of the operands in a relational expression, based on the relational
operator used.
(2) In RPG, tests
performed against two statements in a source program to ensure that the
statements are valid (for example, a GOTO operation must have an associated
TAG operation). This type of checking is done only by the compiler as
opposed to single-statement syntax checking that is done by the SEU
function.
relational condition
In COBOL, a
condition that relates two arithmetic expressions, data items, or
both.
relational data
Data stored in a
relational database management system
(DBMS).
relational database management system (RDBMS)
A system
that manages relational databases such as DB2 UDB, DB2 UDB/VSE & VM, DB2
UDB for AS/400, and Database Manager (for OS/2) databases.
relational database (RDB)
(1) The
complete collection of tables that is managed by one database management
system (DBMS).
(2) In DB2 UDB for
AS/400, a data structure perceived by its users as a collection of tables that
is organized and accessed according to relationships between data
items.
relational expression
A logical
statement that describes the relationship (such as greater than or equal to)
of two arithmetic expressions or data
items.
relational operator
(1) The reserved
words or symbols used to express a relational condition or a relational
expression.
(2) In COBOL, a reserved
word, a relational character, a group of consecutive reserved words, or a
group of consecutive reserved words and relational characters used to express
a relational condition.
(3) Any of the set of
operators that express an arithmetic condition that can be either true or
false. The operators are:
.GT., .GE., .LT., .LE., .EQ.,
and .NE.. They are defined as greater than, greater than
or equal to, less than, less than or equal to, equal to, and not equal to,
respectively.
relationship
In the Application
Development Manager feature of the Application Development ToolSet licensed
program, a definition of the dependency between two
parts.
relative data
In Business
Graphics Utility, values in a computer image that specify points relative to
other points in the image.
relative distinguished name (RDN)
(1) In the
DCE X/Open Directory Service (XDS), a set of Attribute Value Assertions
(AVAs).
(2) In OSI, a name
that forms part of a distinguished name. See also distinguished
name.
relative end position
In RPG, an
entry on the output specifications that indicates the number of blank
positions that are to appear between a field or constant defined on one
specification line and the field or constant defined on the preceding
specification line. Contrast with exact end
position.
relative file number
In the DDS
for a join logical file, a sequential number assigned to a physical file based
on the position of that file on the JFILE keyword
specification.
relative key
In COBOL, an
unsigned number that can be used directly by the system to locate a record in
a file. Same as relative record
number.
relative host name
The specific
subname of a fully qualified host name. For example, smith is a
relative host name for
smith.endicott.ibm.com.
relative-name format
A print
descriptor naming convention that uses group alias names instead of
system-specific (actual) group
names.
relative organization
In COBOL,
the file organization in which each record is uniquely identified by a
positive number value that specifies the position in the file relative to the
first record.
relative path name
A string of
characters used to refer to an object, starting at some point in the directory
hierarchy other than the root. A relative path name does not begin with
a slash (/). The starting point is frequently a user's current
directory. Contrast with absolute path name. See also
path name and current
directory.
relative positional pattern
In REXX,
the part of a parsing template that uses a plus or minus sign to indicate
movement relative to a previous pattern
match.
relative record number
(1) A number
that specifies the relationship between the location of a record and the
beginning of a database file, member, or subfile. For example, the
first record in a database file, member, or subfile has a relative record
number of 1.
(2) In COBOL, the
ordinal number of a record in a file whose organization is relative.
This number is treated as a numeric constant that is an
integer.
relative-size pie
In Business
Graphics Utility, a piece on a pie chart drawn proportionally to another
piece.
relative time
In the Distributed
Computing Environment (DCE), a discrete time interval that is usually added to
or subtracted from an absolute time. See absolute
time.
relay node
In OSI, a synonym for
relay open system.
relay agent
A program that
delivers Dynamic Host Configuration Protocol (DHCP) packets to a local
system.
relay open system
In OSI
architecture, an open system that forwards data received from one open system
to another open system. (T) Contrast with adjacent destination
node.
Note:
A relay open system requires only the physical layer, data link layer, and
network layer.
release
A distribution of a new
product or new function and authorized program analysis report (APAR) fixes
for an existing product. Normally, programming support for the prior
release is discontinued after some specified period of time following the
availability of a new release. The first version of a product is
announced as Release 1 Modification Level 0. See also modification
level, version, and
VxRxMx.
released state
The state of a
connection that results in a disconnect of the connection at the next commit
operation. Contrast with held
state.
release lever
A part that unlocks
the device so it can be pulled out of the rack on the
slides.
release-program-device operation
An
operation that makes a program device not available for input/output
operations. Contrast with acquire-program-device
operation.
release token
In OSI, the token
that controls the orderly release of an
association.
reliable transfer server (RTS)
In OSI
X.400, a portion of X.400 that is responsible for creating and
maintaining application associations and for reliably transferring
distributions between message transfer agents.
REM
See ring error monitor
(REM).
reminder
In the OfficeVision
program, an item that includes descriptive text on a calendar, for example, a
list of work to be done. A reminder includes a date but no start time
or end time.
remote
Pertaining to a device,
system, or file that is connected to another device, system, or file through a
communications line. Contrast with
local.
Remote Abstract Window Toolkit for Java
An implementation
of the Abstract Window Toolkit (AWT) that allows Java applications to run on a
host system that does not have a graphical user interface (GUI). AS/400
does not support locally attached graphic workstations; therefore Remote
AWT is necessary to allow graphical Java applications to run on
AS/400.
Remote Access Service
Windows NT software
that provides network capabilities over a modem link. AS/400 Operations
Console requires Windows NT users to have Remote Access Service.
remote agent
In OSI, an agent
process on a remote node. Contrast with local
agent.
remote application entity
In OSI,
an application entity on a remote
node.
remote application process
In OSI,
an application process on a remote node. Contrast with local
application process.
remote bus adapter
A bus adapter
in an expansion unit. Optical cables from the local optical link cards
in the system unit plug into this
card.
remote change management server (RCMS)
In
retail communications and Point-of-Sale Utility, a store controller program
communicating over an SNA/SDLC network that connects a host processor and a
store controller. RCMS allows the NetView Distribution Manager program
to access point-of-sale controller files. It also provides error
reporting and recovery for failures and data format conversion for
files.
remote console
The display device
that qualifies as a system console but is not directly attached to an AS/400
system.
remote controller
A device or
system, attached to a communications line, that controls the operation of one
or more remote devices. Contrast with local
controller.
remote controlling system (RCS)
An AS/400
Operations Console configuration that allows a personal computer to dial into
a local controlling system to gain console access to the AS/400
system.
remote control panel
A graphical
interface that is provided by AS/400 Operations Console that allows AS/400
control panel operations to be performed from a remote location. This
interface allows personal computer access to the AS/400 control panel that
controls operating or servicing the system.
remote device
A device whose
controller is connected to an AS/400 system by a communications
line.
remote directory access
In OSI,
the process of accessing directory information that resides on a remote open
system.
remote directory service
In OSI,
the service that enables a system to obtain directory service from another
system. In OSI Communications Subsystem, remote directory service
requires the availability of a directory system agent (DSA) from which a
directory user agent can obtain directory services using the X.500
directory access protocol (DAP).
remote directory system agent
In OSI,
an application process on a remote node that provides directory
service.
remote equipment
The modem and
controller that provides the communications connection between a
communications line and a remote device or system. This remote
equipment is at the other end of a data link from the host
system.
remote input/output
Data that is maintained
across session boundaries, usually in nonvolatile storage such as a database
system or a directory.
remote job entry (RJE)
A function
of the Communications Utilities licensed program that allows a user to submit
a job from a display station on the AS/400 system to a System/370-type host
system.
remote journal network
An OS/400
environment that includes a primary system source journal and target system
journals. The target system journals, associated by using the remote
journal function, are downstream from the primary system source
journal.
remote location name
Any other
system with which a user's system can communicate in a network.
This corresponds to the remote location name specified in the communications
configuration. Equivalent to an SNA remote logical unit name.
Contrast with local location
name.
remote logical unit
In Client
Access, the name that Communications Manager/2 uses to identify an AS/400
system with which the personal computer
communicates.
remote logical unit alias
In
Client Access, the name of the profile that contains the information that
uniquely identifies the remote system.
remote manager
In OSI, a managing
process on a remote node. Contrast with local
manager.
remote name server
(1) In TCP/IP, the
function that allows a system to get an internet address from a remote site
rather than from its own host table.
(2) A name server that
exists outside a local network.
remote network address
In OSI, a
network address that identifies a remote node. See also network
address.
remote node
In OSI, any node
other than the local node. Contrast with local
node.
remote NSAP
In OSI, a service
access point in the network layer of a remote
node.
remote presentation address
In OSI,
a presentation address of an application entity on a remote node. See
also presentation address. Contrast with local
presentation address.
remote printer queue
The name of
a printer queue on a remote system. For a remote system that is an
AS/400 system, this is the name of an output queue on the remote
system.
Remote PrintManager (RPM)
In AFP
support, a personal computer product that allows selected font data, overlays,
and page segments that are present in advanced function printing data streams
to be available to a locally attached IBM page
printer.
remote procedure
In DCE remote
procedure call (RPC), an application procedure located in an address space
separate from calling code. See remote procedure call
(RPC).
remote procedure call (RPC)
(1) A network
protocol that enables an application to communicate with another
server. RPC encompasses many simpler protocols such as Transmission
Control Protocol (TCP) and User Datagram Protocol (UDP). Network File
System (NFS) client commands use the RPC protocol to connect with the
server.
(2) A Distributed Computing
Environment (DCE) component that allows requests from a client program to
access a procedure located anywhere in the network.
remote queue
In MQSeries, a queue
that belongs to a remote queue manager. Programs can put messages on
remote queues, but they cannot get messages from remote queues.
Contrast with local
queue.
remote queue manager
In MQSeries,
to a program, a queue manager is remote if it is not the queue manager to
which the program is connected.
remote queuing
In MQSeries
message queuing, the provision of services to enable applications to put
messages on queues belonging to other queue
managers.
remote service requester
In OSI,
a service requester process on a remote node. Contrast with local
service requester.
remote system
Any other system in
the network with which your system can
communicate.
remote terminal access method (RTAM)
A
function of IBM System/370-type computers that controls operations between the
Job Entry Subsystems (JES2) (JES3) and remote work stations on the AS/400
system.
remote unit of work
(1) The form of SQL
distributed processing in which the application is on a system different from
the relational database, and a single application server services all remote
unit-of-work requests within a single logical unit of work.
(2) A unit of work that
allows for the remote preparation and execution of SQL
statements.
remote work station
A work
station that is connected to the system by data communications.
Contrast with local work
station.
remote writer
A system program
that sends spooled files from an output queue to a remote
system.
removable media
Media (diskette,
tape, or CD-ROM) that can be removed from the drive that is used to read from
the media or to write to the media.
repeatable read
In DB2 UDB for
AS/400, an isolation level that completely isolates an application process
from all other application processes that are running concurrently. At
the repeatable-read level, rows read during a unit of work cannot be changed
by application processes that are running concurrently until the unit of work
is complete, rows changed by application processes that are processing
concurrently cannot be read until they are committed by that application
process, and phantom rows are prevented. See also cursor
stability, read stability, and uncommitted
read.
repetitive DO loop
In REXX, any
instruction that has either a repetitor phrase or a conditional phrase (or
both). The instruction list within the instruction is run zero or more
times, controlled by any repetitor phrase that is optionally changed by a
conditional phrase.
replica
(1) In the DCE Cell Directory
Service (CDS), a directory in the CDS namespace. See master
replica and read-only replica.
(2) In the Lightweight Directory
Access Protocol (LDAP), a read-only server that contains the same data as
another server. Replicas are used to back up LDAP servers and to
provide faster searches by splitting requests among the main server and
replica servers.
replica set
In the DCE Cell
Directory Service (CDS), the set of all copies of a CDS
directory.
replicate
In a remote journal
network, to make a duplicate copy of a journal entry from a source journal to
a target journal.
replicate node
A complete copy of
a cluster resource that is kept up to date through replication. A node
that is designated a replicate node cannot become a backup node or a primary
node. See also backup node and primary
node.
replication
(1) The process of
copying objects from one node in a cluster to one or more other nodes in the
cluster, which makes the objects on all the systems
identical.
(2) In the Distributed Computing
Environment (DCE), the making of a shadow of a database to be used by another
node. Replication can improve availability and
load-sharing.
reply message
A type of message
used for replies to request messages.
reply-to address
A string of data
that represents the address to be replied to. The contents and format
of the string are not defined by the mail server framework. The address
type associated with the reply-to address is assumed to define the contents of
the reply-to address field.
reply-to queue
In MQSeries, the
name of a queue to which the program that issued a put request wants either a
reply message sent or a report message sent.
report
In query management, the
formatted data that results from running a query and applying a form to
it.
report break
In Query, a blank
line or new page that appears in a report when the contents of a specified
field in the report change. A report break can contain column
summaries.
reporting node
In OSI, a node
that reports a message to a manager
node.
report layout utility (RLU)
A
function of the Application Development ToolSet licensed program that is used
to create, change, and save report prototypes. See also report
prototype.
report line
In RLU, a record that
is part of a report prototype for which the user creates data description
specifications (DDS).
report message
A type of message
that gives information about another message. A report message usually
indicates that the original message cannot be processed for some
reason.
report prototype
In RLU, a
representation of the image of a report that a user builds on a display and
the printed report image, both of which look like the actual listing created
by an application program. The report prototype, when saved as a DDS
source member, can be used to create a printer file, which, in turn, can be
used by an application program to create a
report.
repository
See distribution
repository.
request
In OSI, a service
primitive issued by a service user to call a function supported by the service
provider.
request buffer
In DCE Remote
Procedure Call (RPC), a first-in-first-out queue where an RPC system
temporarily stores call requests that arrive at an endpoint of an RPC server
until the server can process them.
requester
(1) A workstation from
which a user can log on to a domain and use network resources.
(2) In Client Access, a program
that requests services from another program (a server). Each Client
Access function has a server and a
requester.
Request for Price Quotation (RPQ)
A
customer request for a price quotation on alterations or additions to the
functional capabilities of a hardware product for a computing system or a
device. Compare with Programming Request for Price Quotation
(PRPQ).
request functional transmission
In
multileaving telecommunications access method (MTAM), a control character
indicating a request for permission to send data. Contrast with
grant functional
transmission.
request header (RH)
In SNA, a
3-byte header that precedes a request unit. The request header
specifies the type of request unit and contains control information associated
with that request unit. Contrast with response
header.
request message
A message that
requests a function from the receiving
program.
request unit (RU)
In SNA, the
record transmitted to the other system. This record can contain a
request, data, or both. Contrast with response unit
(RU).
required backspace
In the
OfficeVision program, a formatting control that moves the printer back a
number of spaces before printing any
text.
required carrier return
In the
OfficeVision program, a manually entered carrier return used after a short
line or at the end of a paragraph to ensure that no more text will be added to
the line during automatic line
adjustment.
required hyphen
In the
OfficeVision program, a hyphen that is not removed when the OfficeVision
program adjusts lines. Contrast with syllable
hyphen.
required space
In the
OfficeVision program, a space or blank that is not removed when the
OfficeVision program adjusts lines (or paragraphs) of
text.
required tab
In the OfficeVision
program, a tab that marks a temporary left
margin.
reserved memory
The area of main
storage between 640KB and 1MB on a personal computer. Reserved memory
cannot be used by adapters and special programs, such as expanded memory
support.
reserved word
A special word that
has a specific meaning to the system as defined in a programming
language.
reset (RST)
The reset logical unit
of work (LUW) state indicates that the current LUW has not yet begun to
prepare to commit. A failure during RST state results in a rollback of
any pending changes.
resident
Remaining in main
storage.
residual error
An error that is
not detected by the network layer. Examples of residual errors are
loss, corruption, duplication, and delivery out of sequence of TPDUs.
Contrast with signaled error.
resilient application
A server program
that can be restarted on a different node without requiring a user to
reconfigure the clients.
resilient resource
Data, a process, or
an application that can be recovered if a node in a cluster fails.
resolution
In computer graphics,
a measure of the sharpness of an image, expressed as the number of lines per
unit of length or the number of points per unit of area discernible in that
image.
resolve
(1) In the OfficeVision
program, to process the text instructions in a document while it is being
printed.
(2) In programming, to change a
predefined, symbolic value to the actual value of the item being
processed. For example, a symbolic value of *LAST defined for the name
of a file member is resolved to the name of the last member when the member is
processed.
resolved document
In the
OfficeVision program, a document that contains final-form text. A
document that has all text instructions processed and is formatted for
printing.
resolved import
An import whose
type and name exactly match the type and name of an
export.
resource
(1) Any part of the system
required by a job or task, including main storage, devices, the processing
unit, programs, files, libraries, and folders.
(2) Any physical item or logical
item to be managed in an information system of an enterprise.
(3) In OSI, pertaining to that
which provides a service. See also logical resource and
physical resource.
resource definition online (RDO)
In CICS,
a facility that allows the user to define certain CICS resources interactively
while CICS is running. Specifically, RDO allows the user to define
terminals, programs, and transactions
interactively.
resource error counters
In OSI,
counters that keep track of errors that occur in layers and other
resources.
resource management
In CICS, a
facility that tracks what system resources are being used. The tracking
is done by mapping the CICS identification name to the underlying system
resources.
resource management utility (RMU)
In AFP
Utilities, an interactive tool used to maintain AFP
resources.
resource name
A name assigned by
the system to a line, controller, or device that is connected to the
system.
resource record
In a Domain Name
System (DNS), a location where data is
stored.
resource security
A security
function of the operating system used to authorize users to any part of the
system that is required by a job or task.
resource tables
Related types of
resource information that are stored within CICS in tables or control
blocks.
responder
(1) In OSI Communications
Subsystem, the application entity that accepts an application
association. Contrast with initiator.
(2) A key server that is asked to
establish a dynamic Virtual Private Network (VPN) connection between two
endpoints.
response
(1) In OSI, a service
primitive issued by a service user to complete the procedures associated with
a confirmed service.
(2) In SDLC, a frame transmitted by
a secondary station. Stations using asynchronous balanced mode send
both commands and responses. Contrast with
command.
response header (RH)
In SNA, a
header, optionally followed by a response unit, that indicates whether the
response is positive or negative and that may contain a pacing
response. Contrast with request header. See also
negative response and positive
response.
response indicator
A 1-character
field passed with an input record from the system to a program to provide
information about the data record or actions taken by the work station
user.
response mode
In the Distributed
Computing Environment (DCE), a mode of terminal operation that synchronizes
operations between the terminal operator and the application
program.
response time
In capacity
planning, the elapsed time between the end of an inquiry or demand on a
computer system and the beginning of the response. An example of
response time is the length of time between an indication of the end of
inquiry and the display of the first character of the response at a user's
work station.
response unit (RU)
In SNA, the
record sent to respond to a request. The response can be either
positive or negative and can include control information. Contrast with
request unit (RU).
restore
To copy data from compact
disc, tape, diskette, optical disc, or a save file to auxiliary
storage. Contrast with
save.
restricted state
The status in
which a user places a system (by ending all subsystems) to do a specific
function, such as saving storage, saving the system, or restoring user
profiles. Other jobs cannot be active on the system while it is in a
restricted state.
REstructured eXtended eXecutor (REXX) language
A
general-purpose programming language, particularly suitable for CL commands,
or programs for personal computing. Procedures and programs written in
this language can be interpreted by the REXX/400 interpreter. See also
REXX/400.
RESULT
A REXX special variable
that is set by the RETURN instruction in a called routine. The RESULT
special variable is dropped if the called routine does not return a
value.
result column
The set of columns
that DB2 UDB for AS/400 SQL selects for an application
program.
result field
In Query, a field
that contains the results of calculations performed on numeric fields in a
file.
resulting indicator
In RPG, an
indicator that signals the result of a calculation, such as whether the result
is plus, minus, or zero; whether a given field is greater than, less
than, or equal to another field; or whether an operation was successfully
completed.
result table
The set of rows that
DB2 UDB for AS/400 SQL selects for an application program. The program
uses a cursor to retrieve the rows one by one into a host structure or a set
of host variables.
resume cursor
A pointer that
tracks the current location at which the exception handler may resume
processing after handling an exception.
resume point
An instruction in a
program where processing continues after handling an
exception.
resynchronize
In OSI, a function
of the session layer that enables two peers to coordinate the exchange of data
to a previously marked point. This point was marked using the major or
minor synchronization service. Resynchronization will normally be
performed after a problem is detected by an application entity or indicated by
the session layer.
retail communications
The data
communications support that allows programs on an AS/400 system to communicate
with programs on point-of-sale systems, using SNA LU session type 0
protocol.
retail controller
In retail
communications and Point-of-Sale Utility, a controller in a network that is
used to collect data from and provide support for the point-of-sale and
administrative devices within the retail system. The retail controller
also provides some local data processing
capabilities.
retail file conversion system
The
support provided by the Point-of-Sale Utility licensed program that changes
point-of-sale files to the AS/400 file format and the AS/400 files to the
point-of-sale format. In addition, options are provided to create
COBOL, RPG, and DDS source statements for the files created from the
conversion process.
retail pass-through
An OS/400
system program that supports routing of user data between a System/370-type
host processor and a retail controller using a single AS/400 system.
Both the SNA upline facility and the retail communications support use
separate intersystem communications function
sessions.
retention
In Backup Recovery and
Media Services, the total length of time that the output media is to be saved
as a backup or archive copy before it is expired (available for reuse).
Retention can be specified as a date, number of days, versions, or
permanent. Different retention periods can be specified for full
backups, incremental backups, or archive output.
retrofit
To change an existing
program or system by adding or replacing a section of code or a physical unit
and making necessary modifications to related
units.
retry
To resend data a prescribed
number of times or until the data is received
correctly.
retry interval
In the
OfficeVision program, the minimum amount of time the program waits before
trying to send another document after a send operation
fails.
return
To remove the call stack
entry and transfer control back to the calling procedure or program in the
previous call stack entry.
return code
For printer files,
display files, and ICF files, a value sent by the system to a program to
indicate the results of an operation by that
program.
return indicator
An indicator to
an RPG program that control should be returned to the calling
program.
return value
In the Distributed
Computing Environment (DCE), a function result that is returned in addition to
the values of any output or input/output
arguments.
reverse charging
In X.25,
a packet-switching data network optional facility that allows the data
terminal equipment (DTE) to request that the cost of a communications session
be charged to the DTE that is called. See also optional user
facilities.
reverse image
Text that appears
on the display in the opposite color (for example, black on green instead of
green on black).
reverse-interrupt (RVI) character
The BSC
transmission control character that is sent as a request from the receiving
station to the sending station to stop transmitting and begin receiving a
message.
reverse map
To transform an
Internet Protocol (IP) address to a host name as opposed to forward-mapping,
where host names are transformed into IP
addresses.
reverse mapping domain
A domain
that transforms Internet Protocol (IP) addresses to host
names.
Revisable-Form Text:Document Content Architecture
The
architectural specification for the information interchange of documents whose
text is in a revisable format. A Revisable-Form Text:Document
Content Architecture document consists of structured fields, controls, and
graphic characters that represent the format and meaning of the
document.
revisable-form text (RFT)
In the
OfficeVision program, a data stream defined by document content architecture
that is used to exchange unresolved documents (which cannot be directly
printed or displayed) between systems. Contrast with final-form
text (FFT).
revision symbol
In the
OfficeVision program, a character used in the left margin to indicate that a
document line is changed.
rewind
To move tape from the
take-up hub to the supply hub.
REXX language
See
REstructured eXtended eXecutor (REXX)
language.
REXX/400
The Operating System/400
implementation of the Systems Application Architecture Procedures
Language. REXX/400 is a programming language that is supported by an
interpreter provided as part of the Operating System/400 licensed
program. See also REstructured eXtended eXecutor (REXX)
language.
REXX/400 interpreter
The language
processor of the OS/400 licensed program that processes procedures and
programs written in the REXX language.
RFT
See revisable-form text
(RFT).
RH
(1) In
SNA, a 3-byte header that precedes a request unit. The request header
specifies the type of request unit and contains control information associated
with that request unit.
(2) In SNA, a header, optionally followed
by a response unit, that indicates whether the response is positive or
negative and that may contain a pacing response. See also negative
response and positive
response.
right-justify
To print text with
an even right margin by adding extra space throughout a
line.
ring error monitor (REM)
In
communications, a function of the token-ring manager that observes, collects,
and analyzes recoverable and irrecoverable error reports sent by token-ring
stations on a single token-ring network and assists in fault isolation and
correction.
RIP
See Router Information
Protocol (RIP) and Routing Information Protocol
(RIP).
RISC
See reduced instruction
set computer (RISC).
RJE
See remote job entry
(RJE).
RLE
See run-length encoding
(RLE).
RLSD
See received line
signal detector (RLSD).
RLU
See report layout
utility (RLU).
RMI
See Java Remote Method
Invocation (RMI).
RMU
See resource management
utility (RMU).
RNR
See receive not ready
(RNR).
robot
For media library devices,
a part (carriage and picker assembly) for moving media between the cartridge
storage slots and the drives.
ROECE
Regional Office Europe
(Central and East).
roll back
To remove changes that
were made to database files under commitment control since the last commitment
boundary.
rollback
The process of restoring
data changed by an application program or user to the state at its last
commitment boundary (commitment
point).
rollback required (RBR)
The
rollback required logical unit of work (LUW) state indicates that a rollback
vote was received for a prepare-for-commit request or that a failure has put
the current transaction into a state where it must be rolled back. The
transaction program is not allowed to perform any further changes under
commitment control.
ROM
See read-only memory
(ROM).
root directory
In the operating
systems for personal computers, the directory on a disk or diskette that
contains the list of files stored on that disk or diskette. If more
than one directory is on a disk or diskette, the root directory is at the
"top" of the hierarchy of directories. The root directory is
created by the operating system when the disk or diskette is
formatted.
root domain
Names servers that
are authoritative for all of the top-level
domains.
root file system
A file system
that supports objects in the root (or /) directory. Access to all
objects, regardless of which file system they actually reside in, starts at
the root. Other file systems may be mounted over directories managed by
the root file system, thus allowing all file systems to appear as a single
file system tree.
root folder
The folder on the
system that contains all other folders. The system-recognized
identifier is *ROOT.
root group
In the Application
Development Manager feature of the Application Development ToolSet licensed
program, the first, or top, group in any project
hierarchy.
root server
A name server that
functions at the highest level node in the name system
tree.
rotary dial
On a switched
communications line, the dialing method that creates a series of pulses to
identify the called station.
rotor
The rotating part of a
sensor.
round-trip conversion
A
conversion where the integrity of all character data is maintained from the
source CCSID to the target CCSID and back to the source. The characters
that are in both the target CCSID and the source CCSID are preserved.
Any characters outside the target CCSID are arbitrarily assigned unique code
points in the target CCSID.
route
The path that network
traffic follows from its source to its
destination.
route metrics
In the Internet
suite of protocols, the method used by the Routing Information Protocol (RIP)
to choose the best Internet routes. The unit of measure is the number
of hops between the origin and destination. In practice, the metric for
a route is often assigned based on factors such as link transmission speed and
line cost, not on the actual number of hops.
router
(1) A special purpose,
dedicated computer that attaches two or more networks.
(2) A part of the Client Access
licensed program that handles requests to send and receive data from
applications on the personal computer and routes them to the appropriate
applications on the AS/400 system.
(3) In TCP/IP, synonymous with
gateway. Contrast with
bridge.
Router Information Protocol (RIP)
The
distance-vector routing protocol used by the Internetwork Packet Exchange
(IPX) routers on the network to exchange routing information about the
connected networks. The information is exchanged through the use of
IPX. A RIP packet contains sets of network entry
information.
routine
(1) A set of statements in a
program that causes the system to perform an operation or a series of related
operations.
(2) In REXX, a series of
instructions called with the CALL instruction or as a function. A
routine can be either internal or external to a user's
program.
routine-name
In COBOL, a
user-defined word that identifies a procedure written in a language other than
COBOL.
routing
The list of users who are
to receive an item when it is distributed, including all users named
specifically and those users named on distribution lists by the
sender.
routing data
Information stored
in the job description that identifies the routing entry used by a
job.
routing entry
An entry in a
subsystem description that specifies the program to be called to control a
routing step that runs in the
subsystem.
Routing Information Protocol (RIP)
In the
Internet suite of protocols, a protocol used to exchange intradomain routing
information and to determine optimum routes between internet hosts.
This protocol determines optimum routes on the basis of route metrics, not
link transmission speed.
routing step
The processing that
results from running a program specified in a routing entry. Most jobs
have only one routing step.
routing table
(1) In DataPropagator
Relational, a table at the copy server that points to the control server for
this instance of the apply program.
(2) In SNADS, a list of
entries in a table that the system uses to route a message or electronic mail
to a user on the system. Each entry is made up of a destination group
name (such as a department or organization) and a destination element name
(the user ID of each person in that department or organization).
(3) In a point-to-point
profile, a collection of path information through which hosts or networks can
communicate with other hosts and networks.
row
In
SQL, the horizontal part of a table. A row consists of a sequence of
values, one for each column of the table.
RPC
See Remote Procedure
Call (RPC)
RPC control program
In DCE Remote
Procedure Call (RPC), an interactive administrative facility for managing name
service entries and endpoint maps for RPC
applications.
RPCD
See RPC daemon
(RPCD).
RPC daemon (RPCD)
In DCE Remote
Procedure Call (RPC), the process that provides the endpoint map service for a
system. See also endpoint map and endpoint map
service.
RPC interface
In DCE Remote
Procedure Call (RPC), a logical group of operations, data types, and constant
declarations that serves as a network contract for a client to request a
procedure in a server. See also interface definition and
operation.
RPC protocol
A DCE Remote
Procedure Call (RPC)-specific communications protocol that supports the
semantics of the DCE RPC API and runs over either connectionless of
connection-oriented communications
protocols.
RPC protocol sequence
In DCE
Remote Procedure Call (RPC), a valid combination of communications protocols
represented by a character string. Each RPC protocol sequence typically
includes three protocols: a network protocol, a transport protocol, and
an RPC protocol that works with the network and transport protocols.
See network protocol, RPC protocol, and transport
protocol. Synonymous with protocol
sequence.
RPC runtime
In DCE Remote
Procedure Call (RPC), a set of operations that manages communications,
provides access to the name service database, and performs other tasks, such
as managing servers and accessing security applications for RPC
applications. See RPC runtime
library.
RPC runtime library
In DCE Remote
Procedure Call (RPC), a group of routines of the RPC runtime that support the
RPC applications on a system. The runtime library provides a public
interface to application programmers, the application program interface (API),
and a private interface to stubs, the stub program interface (SPI). See
RPC runtime.
RPC thread
In DCE Remote
Procedure Call (RPC), a logical thread within which a remote procedure call is
run. See thread.
RPDS
See VM/MVS
bridge.
RPG
A
programming language designed for writing application programs for business
data processing requirements. The application programs range from
report writing and inquiry programs to applications, such as payroll, order
entry, and production planning. See also Integrated Language
Environment RPG (ILE RPG).
RPG/400
See Integrated
Language Environment RPG (ILE RPG).
RPM
See Remote PrintManager
(RPM).
RPQ
See Request for Price
Quotation (RPQ).
RR
See
receive ready (RR).
RSCS/PROFS bridge
See VM/MVS
bridge.
RSCS/PROFS distribution services (RPDS)
See
VM/MVS bridge.
RSHUTD
In SNA, a command used to
request an orderly end to a session.
RST
See reset
(RST).
RS-310
An Electronic Industries
Association standard for designing racks to hold data processing
equipment.
RTAM
See remote terminal
access method (RTAM).
RTS
See reliable transfer
server (RTS).
RU
(1) In
SNA, the record sent to respond to a request. The response can be
either positive or negative and can include control information.
(2) In SNA, the record transmitted to the
other system. This record can contain a request, data, or
both.
RU chain
In SNA, a set of related
request or response units that are transmitted consecutively on a particular
normal or expedited data flow. See also
bracket.
rule
A procedure that defines how
Internet Protocol (IP) packet security should handle packets. Rules in
IP packet security pertain to hidden addresses, mapped addresses, and
filters.
rules file
A file that contains
rules and definitions that pertain to those
rules.
RUMBA/400
An optionally
installable component of Client Access, based on the Microsoft Windows
program, that provides 5250 display emulation and 5225 printer
emulation.
rundown procedure
In DCE Remote
Procedure Call (RPC), a procedure used with a context handle that is called
after a communications failure. It recovers resources reserved by a
server for servicing requests by a particular client. See context
handle.
run-length encoding (RLE)
A
technique for compressing data that avoids repeatedly having to code data
elements of the same value; instead, the value is coded once, along with
the number of times for it to be
repeated.
running heading
In the
OfficeVision program, a column heading that is repeated on following pages if
the column continues on more than one page.
run time
The time during which
the instructions of a computer program are run by a processing
unit.
run-time array
In RPG, an array
that is loaded or created by input or calculation specifications after the
program starts to run. Contrast with compile-time array and
prerun-time array.
run-time defaults
In query
management, all of the formatting elements of a formatted report that were not
explicitly specified in the form.
run-time environment
In the C
language, a logical grouping of one or more program objects that must be
connected at application run time to do some
task.
runtime semantics
In DCE Remote
Procedure Call (RPC), the rules of run time for a remote procedure call,
including the effect of multiple calls on the outcome of a procedure's
operation. See at-most-once semantics, broadcast
semantics, and maybe
semantics.
run-time table
In RPG, a table
that is loaded or created by input or calculation specifications after the
program starts to run. Contrast with compile-time table and
prerun-time table.
run unit
In COBOL, a set of one
or more programs that run as a set to solve a problem. A set starts
with the first COBOL program in the call stack and includes all programs
(COBOL) (non-COBOL) that are below it in the call
stack.