A functional
unit that converts images to signals for transmission over a telephone system
or that converts received signals back to images.
(T)
factor
In RPG, an entry (for
example, a field name, file name, literal, or data structure) that identifies
the data to be used in an operation.
factory
In object-oriented
programming, a class that is used to create instances of another class.
A factory is used to isolate the creation of objects of a particular class
into one place so that new functions can be provided without widespread code
changes.
failover
A cluster event where
the primary database server or application server switches over to a backup
system due to the failure of the primary server.
fanout
(1) In communications, the
process of creating copies of a distribution to be delivered locally or to be
sent through the network.
(2) A single output that becomes
input to multiple branches.
far-end code violation
In
Performance Tools, an unintended line code violation detected by the network
termination 1 (NT1), and counted by the terminal equipment (TE), for frames
transmitted to the NT1 on the interface for the T reference point in the
integrated services digital network (ISDN). The NT1 reports a violation
to the TE through the maintenance channel
S1.
fast packet switching
Communications
protocols, such as frame relay and cell relay, that specify the processing of
lower-layer data only for the transmission of data packets across a
network.
fast path
A method of doing
something more directly and quickly than the usual way. For example,
pressing a function key is faster than typing a command. See also
shortcut key.
fast select
In OSI, an
X.25 optional user facility that can be encoded into a call request
packet sent to an adjacent node. The fast select facility is included
to provide conformance to ISO 8878.
fault
(1) In DCE Remote Procedure
Call, an exception condition, occurring on a server, that is transmitted to a
client.
(2) In OSI, an event that triggers an
unwanted transition in the condition of a resource.
fax
(1) The printed copy received
from a facsimile machine. (T)
(2) To transmit an image using a
telephone system and facsimile machines. (T)
(3) The use of a telephone system for
the electronic transmission and receipt of hard-copy images.
(T)
fax machine
Synonym for
facsimile machine. See facsimile
machine.
FCFC
See first-character
forms control (FCFC).
FCMU
See file compare and
merge utility (FCMU).
FCS
(1) See frame check sequence
(FCS).
(2) See function control sequence
(FCS).
FCT
See forms control table
(FCT) or file control table (FCT).
FD:OCA
See Formatted Data
Object Content Architecture (FD:OCA)
feature
Part of a product that
can be ordered separately.
feature-unique Licensed Internal Code (FULIC)
The
Licensed Internal Code shipped with the processor feature that provides
support for that feature. FULIC is a complex instruction set computer
(CISC)-only function. See also Licensed Internal Code and
model-unique Licensed Internal Code
(MULIC).
fetch
To retrieve data from a
database.
fetch overflow
In RPG, a routine
that allows the user to change the basic RPG overflow logic to prevent
printing over the perforation and to allow the user to use as much of the page
as possible.
FFDC
See first-failure data
capture (FFDC).
FFST
See First Failure
Support Technology (FFST).
FFT
See final-form text
(FFT).
FI
Failing
item.
fiber optics
The technology of
guiding optical power (or light) through thin, transparent strands (or fibers)
that are made of glass, fused silica, or
plastic.
fidelity
In AFP support, the
degree of exactness required when processing the input data stream for
printing a file. Different levels of fidelity can be specified, which
determine how errors are handled (such as substituting fonts when a font named
in the data stream cannot be found).
FID field
See format
identification (FID) field.
field
(1) A group of related bytes
(such as name or amount) that is treated as a unit in a
record.
(2) An identifiable area in a window,
such as an entry field where a user types text or a field of radio buttons
from which the user selects one choice in the field.
(3) In DDS, the smallest identifiable
part of a record.
field definition
In IDDU,
information that describes the characteristics of data in a field, such as its
name, length, and data type. A field definition resides in a data
dictionary. See also file definition and record format
definition.
field description
Information
that describes the characteristics of data in a field. See also
file description and record format
description.
field indicator
In RPG, an
indicator that shows whether a given field in an input record is plus, minus,
zero, or blank.
field level specifications
In DDS,
specifications coded on the same line as a field name or on lines immediately
following a field name. See also file level specifications,
record level specifications, help level specifications,
join level specifications, key field level
specifications, and select/omit level
specification.
field line
In RLU, a temporary
record in a report prototype that indicates the field boundaries in an
associated report line.
field outline
The output record
to be printed outlines, with boxes, the fields of data within the
record.
field record relation indicator
In RPG,
an indicator that associates fields in an input record with a particular
record type. The field record relation indicator is normally used when
the record type is one of several in an OR
relationship.
field reference file
A physical
file that contains no data, only descriptions of
fields.
field selection
(1) A function that
uses the state of the option indicators to display or print data when a record
format is written.
(2) In Business Graphics
Utility, the selection of fields from a database file for use as data values
and data labels.
(3) In the GDDM function,
the selection of fields from a database file for use as data
values.
FIFO
See first-in first-out
(FIFO).
figurative constant
(1) In COBOL, a
reserved word that represents a numeric or character value or a string of
repeated values. The word can be used instead of a literal to represent
the value.
(2) In RPG, an implied
literal that is specified in the calculation specifications without a length
definition because the implied length and decimal positions are the same as
those of the receiver field.
file
(1) A generic term for the
object type that refers to a database file, a device file, or a save
file. The system-recognized identifier for the object type is
*FILE.
(2) In VisualAge RPG, a collection of
related data that is stored and retrieved by an assigned name. A file
can include information that starts a program (program-file object), contains
text or graphics (data-file object), or processes a series of commands (batch
file).
file attribute conflict condition
In
COBOL, an unsuccessful attempt to run an input-output operation on a file
whose file attributes, as specified for that file in the program, do not match
the fixed attributes for that file.
file chaining
In Query, a
function that allows a query application to use data from two database
files. The query application views the two chained files as if they
were one file and refers to the first file as the primary record format and
the second file as the secondary record
format.
file clause
In COBOL, a clause
that appears as part of any of the following Data Division entries: file
description entry (FD entry) and sort-merge file description entry (SD
entry).
file compare and merge utility (FCMU)
A
function of the Application Development ToolSet licensed program that is used
to compare physical file members and merge updates to file
members.
file connector
In COBOL, a
storage area that contains information about a file and is used as the
connection between a file-name and a physical file, and between a file-name
and its associated record area.
file control
The CICS facility
for managing basic operations against a file (ADD, READ, DELETE, REWRITE, and
BROWSE).
FILE-CONTROL
COBOL, the name
and header of an Environment Division paragraph in which the data files for a
source program are named and assigned to specific input/output
devices.
file control entry
In COBOL, a
SELECT clause and all its subordinate clauses that declare the relevant
physical attributes of a file.
file control table
A CICS table
containing the characteristics of files accessed by file
control.
filed document
In the
OfficeVision program, electronic mail or a document that is stored in the
document library.
file definition
(1) In RPG, file
description and input specifications that describe the records and fields in a
file.
(2) In IDDU, information
that describes the contents and characteristics of a file. A file
definition resides in a data dictionary. See also field
definition and record format
definition.
file description
The description
of a file and its contents.
file description entry
In COBOL,
an entry in the FILE SECTION of the Data Division that contains information
about the identification, the physical organization, and the record name of a
file.
file description file
In Client
Access, a personal computer file that describes a personal computer data
file. The description includes the name, data type, field length, and
format of the data file. This information is used by the Client Access
transfer function to transfer data to the AS/400
system.
file description specifications
In RPG, a
specification on which the programmer identifies and describes all files used
in a program.
file descriptor
A small positive
integer that the system uses instead of the file name to identify an open
file.
file exception/error subroutine
In RPG, a
user-written program that may be called following file exceptions or program
errors.
file identifier
A 3-character
identifier used for files being joined in Query for a query. The
identifiers are used during a query definition to uniquely identify each
file.
file information data structure (INFDS)
In RPG, a
data structure that can be defined for each file to make file exception/error
information available to the program. A file information data structure
must be unique for each file.
file key
In RPG, all the key
fields defined for a file.
file level specifications
In DDS,
specifications coded on the lines before the first record format name.
See also field level specifications, key field level
specifications, record level specifications, join level
specifications, select/omit level specifications, and
help level specifications.
file list
A list of files
contained in a library.
file maintenance
The process of
adding, changing, or deleting records in a file to keep them
current.
file name
The name used by a
program to identify a file. See also
label.
file-name
(1) In COBOL, a name
associated with a file and defined in a file description entry or in a
sort-merge file description entry.
(2) In COBOL, a user-defined
word that names a file connector described in a file description entry or in a
sort-merge file description entry within the FILE SECTION of the Data
Division.
file name extension
An optional
3-letter code that may be used as the second part of a PC file name, and is
separated from the file name by a period (.). Extensions have
meanings to programs, and may be used to identify the type of the
file.
file operation code
In RPG, an
operation code (for example, CHAIN) that lets the user control the
input/output operations to a file.
file organization
In COBOL, the
permanent file arrangement established at the time that a file is
created.
file overrides
Attributes
specified at run time that change the attributes specified in the file
description or in the program.
file pointer
In the hierarchical
file system, the representation of the position or offset in the file where
the next read or write operation
occurs.
file position indicator
In COBOL,
a conceptual entity that (a) contains the value of the current key within the
key of reference for an indexed file, the record number of the current record
for a sequential file, or the relative record number of the current record for
a relative file; or (b) indicates that no next logical record exists,
that the number of significant digits in the relative record number is larger
than the size of the relative key data item, that an optional input file is
not present, that the at end condition already exists, or that no valid next
record has been established.
file reference function
A
function of the system that lets the user track file use on the
system.
File Section
In COBOL, the
section of the Data Division that contains file description entries and
sort-merge file description entries together with their associated record
descriptions.
file separator
The pages produced
at the beginning of each output file and used to separate the file from the
other files being sent to an output
device.
file server I/O processor
An
input/output processor (IOP) that serves
files.
File Services
See OSI File
Services.
file share
A unique name assigned
to an AS/400 integrated file system directory that lets remote users and
applications access the directory.
files library
The library to
search for database files for a System/36 environment
job.
file system
(1) A collection of files
and certain attributes associated with those files.
(2) In the hierarchical file
system, the underlying system support that manages I/O operations to files and
controls the format of information on the storage media. A file system
allows applications to create and manage files on storage devices and to
perform I/O operations to those
files.
file transfer, access, and management (FTAM)
The OSI
standard for transferring files between
nodes.
File Transfer Protocol (FTP)
In TCP/IP,
an application protocol used for transferring files to and from host
computers. FTP requires a user ID and possibly a password to allow
access to files on a remote host system. FTP assumes that the
Transmission Control Protocol is the underlying
protocol.
file transfer support (FTS)
A function
of the operating system that moves file members from one AS/400 system to
another or from an AS/400 system to a System/36 by using asynchronous, APPC,
or BSCEL communications support.
file translation
In RPG, a
function that can change any of the 256 EBCDIC characters into another EBCDIC
character.
filler line
RLU, a record in a
report prototype that represents spacing between record formats and is used in
the data description specifications (DDS) for the
report.
fillet
In the GDDM function, a
curve that is tangent to the end points of two connected lines. See
also polyfillet.
fill-in document
In the
OfficeVision program, a document that allows a user to merge data into
documents without using Query.
fill pattern
In Business Graphics
Utility, the shading used inside a bar and pie slice on a chart and below the
lines of a chart.
filter
(1) In the Distributed
Computing Environment (DCE), an assertion about the presence or value of
certain attributes of an entry to limit the scope of a search.
(2) In OSI, a synonym for event
filter.
(3) In System Manager, a function
that assigns alerts or problems into groups and specifies the actions to take
for each group. A filter consists of selection entries and action
entries.
(4) Criteria with which Internet
Protocol (IP) packets are compared and either allowed to continue to their
destinations or blocked. Filters contain such criteria as destination
address, source address, and transport
protocol.
filter interface
A statement that
is used to associate a set of filter rules with a particular physical
interface.
filtering
The selective function
of allowing some Internet Protocol (IP) packets to continue to their
destination or, at the same time, blocking
others.
filter rule
A rule that selects
particular Internet Protocol (IP) traffic and requests an action for that
traffic. Possible actions are to discard the packet, to allow the
packet without security, and to take the appropriate IP security
action.
Final-Form Text:Document Content Architecture
The
architecture that specifies the structure of the data stream used for the
interchange of text documents formatted for presentation. A Final-Form
Text:Document Content Architecture document consists of text and
formatting information that controls the presentation of the
text.
final-form text (FFT)
A data stream
defined by document content architecture that is used to exchange resolved
documents (which can be printed directly by most printers or displayed)
between systems. Contrast with revisable-form text
(RFT).
final warning
In OSI
Communications Subsystem, a subsystem threshold that indicates that not enough
system storage is available to maintain existing connections. When the
final warning threshold is reached, the subsystem ends existing connections
and does not allow new connections to be made. See also first
warning.
finance communications
The data
communications support that allows programs on an AS/400 system to communicate
with programs on finance controllers, using the SNA LU session type 0
protocol.
finance device
A device, such as
the 4700 Finance Communications System devices and the 3694 Document
Processor, that performs functions specifically related to the finance
industry. The 3180, 3270, and 5250 work stations are not finance
devices.
finance I/O manager (FIOM)
A set of
routines that can be used by an application program to do I/O operations on a
finance device that is configured as a non-intersystem communications function
(non-ICF) device.
finance support
A part of the
system support that uses an AS/400 system as a host system to which finance
devices can be attached.
finger
In the Internet suite of
protocols, a program that displays information about the current users of a
local or remote system. The finger usually displays the user's
full name, last login time, idle time, terminal line, and terminal location
(where applicable).
finishing margin
In AS/400 system
printing, the distance from the edge of a paper to the line where staples are
placed for edge stitching.
FIOM
See finance I/O manager
(FIOM).
firewall
A logical barrier around
systems in a network. A firewall consists of hardware, software, and a
security policy that control the access and flow of information between secure
or trusted systems and nonsecure or untrusted systems. See also
proxy gateway.
first-character forms control (FCFC)
A method
that specifies the format of printed output. The first character of
each record determines the
format.
first-failure data capture (FFDC)
The
OS/400 implementation of the FFST architecture providing problem recognition,
selective dump of diagnostic data, symptom string generation, and problem log
entry.
First Failure Support Technology (FFST)
Pertaining
to an IBM architecture that defines a single approach to error detection
through defensive programming techniques. These techniques provide
proactive (passive until required) problem recognition and a description of
diagnostic output required to debug a software
problem.
first-in first-out (FIFO)
(1) A queuing
technique in which the next request to be processed from a queue is the
request of highest priority that has been on the queue for the longest
time.
(2) In REXX, a
queuing technique in which the next item to be retrieved is the item that has
been on the queue for the longest time. Contrast with last-in
first-out (LIFO).
first-level folder
A folder name
that is not preceded by another folder name. A first-level folder is
the first folder name in a folder path. For example, if folder A is a
first-level folder, folder path A/B indicates that folder B is within folder
A, and that folder A is within the root folder. See also folder
path.
first-page indicator
In RPG, an
indicator, coded as 1P, that specifies which lines (such as headings) should
be printed on the first page only.
first speaker
In SNA, the logical
unit (LU) half-session defined when the session is started as the half-session
able to begin a bracket without requesting permission from the other LU
half-session to do so, and the half-session winning permission if both
half-sessions attempt to begin a bracket simultaneously. See also
bracket protocol. Contrast with
bidder.
first warning
In OSI
Communications Subsystem, a subsystem threshold that indicates that not enough
system storage is available to establish new connections. When the
first warning threshold is reached, the subsystem maintains existing
connections but does not allow new connections to be made. See also
final warning.
fix
See program temporary
fix (PTF).
fixed array
In DCE Remote
Procedure Call (RPC), an array whose size is defined in the Interface
Definition Language (IDL). All of the data in a fixed array is
transmitted during a remote procedure
call.
fixed currency symbol
A currency
symbol that appears in the far left position of an edited field.
Contrast with floating currency
symbol.
fixed data
In AFP Utilities, an
element in the record layout and page layout that has a constant value.
Contrast with variable data.
fixed disk
See hard
disk.
fixed file attributes
In COBOL,
information about a file that is established when a file is created and that
cannot subsequently be changed during the existence of the file. These
attributes include the organization of the file (sequential, relative, or
indexed), the prime record key, the alternate record keys, the minimum and
maximum record size, the record type (fixed or variable), the collating
sequence of the keys for indexed files, the minimum and maximum physical
record size, the padding character, and the record
delimiter.
fixed-form
Pertaining to the
entering of data according to certain rules of format. Contrast with
free-form.
fixed length
A specified length
for a record or field that cannot be
changed.
fixed-length
Pertaining to a
characteristic of a file in which all of the records are the same length, or
pertaining to a characteristic of a field on a display that is of a defined
length.
fixed-length string
In DB2 UDB
for AS/400, a character string whose length is specified and cannot be
changed. Contrast with varying-length
string.
fixed-point constant
A numeric
constant shown as an optional sign followed by one or more digits and a
decimal point.
fixed-point format
(1) The external
representation of a decimal value, that shows an optional sign followed by one
or more digits, a decimal point, and zero or more digits.
(2) The internal storage
format that represents a fixed-point value that can be stored either in zoned
or packed decimal format.
fixed-point notation
A REXX
number that is written without exponentiation.
flag
(1) The bit sequence 01111110
used to mark a frame in SDLC.
(2) Information about the extended
attribute that is stored with the extended
attribute.
flight recorder
An object that
stores trace information used to record a history of what has happened in the
system's programs. The flight recorder contains only information
that helps to identify the flow of the system's programs and status
information.
floating bar chart
A chart that
shows bars detached from either line. See also composite bar
chart and multiple bar
chart.
floating bar graph
In Performance
Tools, a graph that shows bars detached from either line. See also
composite bar graph.
floating currency symbol
A
currency symbol that appears immediately to the left of the far left position
in an edited field. Contrast with fixed currency
symbol.
floating point
A method of
encoding real numbers within the limits of finite precision available on
computers.
floating-point constant
(1) A number
shown as an optional sign followed by one or more digits and a decimal point,
which may be at the end.
(2) A numeric
constant shown as an optional sign, followed by the letter D or E, followed by
a 1- to 3-digit integer constant. For example, 3E-02, which is 3 times
10 to the -2 power or 0.03.
floating-point format
In binary
floating-point representation, the storage format that represents a binary
floating-point value. See also long format and short
format.
floating-point notation
A REXX
number that is written using exponentiation.
flow
The passing of a message
from one process to another. The passing of messages of a particular
type between processes. For example, Distributed Relational Database
Architecture (DRDA) flows are those that consist only of messages described by
the DRDA protocol as part of the DRDA
protocols.
flow control
In OSI, procedures
that control the amount of data than can be sent from one node to
another. Flow control is used to prevent a node from sending data to
another node faster than the receiver can handle
it.
flush left
In the OfficeVision
program, text aligned at the left margin. See also
left-justify.
flush right
In the OfficeVision
program, text aligned at the right margin. See also
right-justify.
FM
See
frequency modulation (FM).
FMH
See function management
header (FMH).
focal point
An APPN network node
that is the destination of alerts. A focal point allows a customer to
centrally manage a network. See also primary focal point,
default focal point, and sphere of
control.
focus
In VisualAge RPG, the state
of a component, as indicated by the cursor, that indicates where a user's
interaction with the keyboard will appear.
fold
To continue data on the next
line. Contrast with truncate.
folder
(1) A directory for
documents. A folder is used to group related documents and to find
documents by name. The system-recognized identifier for the object type
is *FLR. See also document library object. Compare
with library.
(2) A list used to organize
objects.
folderless document
A document in
the document library that is not in any
folder.
folder path
A folder name,
followed by one or more additional folder names, where each preceding folder
is found. For example, path A/B indicates that folder B is within
folder A, and that folder A is in the root folder. See also
subfolder.
font
(1) An assortment of characters
of a given size and type style.
(2) A particular type style (for
example, Bodini or Times Roman) that contains definitions of character sets,
marker sets, and pattern sets.
font character set
In AFP
support, a font file that contains the raster patterns, identifiers, and
descriptions of characters.
font ID
A number that identifies
the character style and size for certain
printers.
font palette
In VisualAge RPG, a
window from which the user can select the font to be applied to a selected
control.
font resource
A resource object
on the AS/400 system that is required to print AFPDS documents on a
printer. The three types of font resources are coded fonts, character
sets, and code pages. The system-recognized identifier for the object
type is *FNTRSC.
footer
In the OfficeVision
program, one or more lines of text that prints at the bottom of every page of
a document, such as a page number, the date, an outline heading, or the
document ID. Contrast with
header.
footing area
In COBOL, the
position of the page body adjacent to the bottom
margin.
footnote reference number
In the
OfficeVision program, the number assigned to a word or phrase in the text of a
document that refers to a footnote. Contrast with reference
number.
force-all
In Application
Development ToolSet, a specification that tests whether the control field in
the input record contains a particular entry. If it does not, the
control field character is replaced before the record is
sorted.
forced Licensed Internal Code completion
A
function of the system that allows the user to force a deadlocked system to
complete interrupted machine instructions by turning the Power switch on the
control panel to the Delayed Off position.
force time
The time when all
items on a distribution queue are sent regardless of how many items are on the
queue. Compare with send depth and send
time.
foreign key
(1) A field or set of
fields in a dependent file of a constraint relationship. Each foreign
key value must either match a parent key value in the related parent file or
be null.
(2) In DB2 UDB for AS/400, a key
that is part of the definition of a referential
constraint.
fork
In the Distributed Computing
Environment (DCE), to create and start a child process. Forking is
similar to creating an address space and attaching. It creates a copy
of the parent process, including open file
descriptors.
form
(1) In AFP support, a physical
sheet of paper on which data is printed. Synonymous with medium,
physical page, and sheet.
(2) In query management, an object that
describes how to format the data for printing or displaying a
report.
format
(1) A defined arrangement of
such things as characters, fields, and lines, usually used for displays,
printouts, files, or documents.
(2) The arrangement or layout of
fields in a record.
(3) The arrangement or layout of data
on a storage medium, such as disk, tape, or diskette.
(4) To set the block size for the
9332 Disk Unit, either automatically by the system or specifically by the
user.
(5) To arrange information on a page,
in a file, or on a display screen.
(6) To prepare a diskette so that it
can be used by a computer.
format identification (FID) field
In SNA, a
field in each transmission header that indicates the format of the
transmission header.
format line
In SEU, the
abbreviated names of the source line fields that are displayed directly above
the source line. The format line is displayed when the F (format) line
command is run.
format selector
A user-defined
program (either a CL or a high-level language program) that determines where a
record should be placed in the database when an application program does not
pass a record format name for a record being added to a logical
file.
Formatted Data Object Content Architecture (FD:OCA)
A defined
collection of constructs used to interchange formatted
data.
formatted diskette
A diskette on
which the control information is written but which may or may not contain any
data.
formatted document
A document
arranged in paragraphs and pages usually for viewing or
printing.
formatted LOGON
In RJE, the
correctly formatted logon specified in the CRTRJECFG command for the Systems
Network Architecture (SNA) environment. No formatting is done on the
host end for this LOGON.
formatted program interface
(1) The 3270
emulation support that converts 3270 data streams into a 1920-character (or
larger) display image for user-written programs. Contrast with
unformatted program interface.
(2) For the SNA
3270 program interface, the interface for which the 3270 data stream is
converted into a display or printer image before being passed to the user
application program. Contrast with unformatted program
interface.
formatted text
The footnote
reference number and the associated text within the footnote that is resolved
at the bottom of the page.
form definition
An AFP resource
object that defines the characteristics of the printed media; for
example, overlays to be used, text suppression, position of page data on the
form, and number and modifications of a page. The system-recognized
identifier for the object type is *FORMDF.
form feed
An ASCII printer
control, X'0C', that causes the printer to eject the current
page. All jobs printing on a page printer should end with a form feed,
which forces the last page to print.
form-field editing
Numeric,
character, or date and time editing that can be specified for a form-field
instruction.
forms control table (FCT)
An object
that contains the special processing requirements for output data streams
received from a host system by a remote job entry (RJE) session. The
system-recognized identifier for the object type is
*FCT.
forms flash
In AFP support on the
3800 Printing Subsystem, a means of printing an overlay using a negative plate
projected on a form.
form type
A 10-character
identifier, assigned by the user, that identifies each type of form used for
printed output.
FORTRAN (formula translation)
A
programming language primarily used to write computer programs for arithmetic
functions.
forwarder
A name server whose
main purpose is to handle all off-site queries for name servers at a given
site.
forward-mapping domain
A domain
database file that maps host names to Internet Protocol (IP)
addresses.
forward recovery
The process of
reconstructing a file from a particular point by restoring a saved version of
the file and then applying changes to that file in the same order they were
originally made. Contrast with backout
recovery.
FQDN
See fully qualified
domain name (FQDN).
fragment
An Internet Protocol
(IP) datagram that contains only a portion of the user data from a larger IP
datagram. See also datagram and
fragmentation.
fragmentation
The process of
breaking down an Internet Protocol (IP) datagram into smaller parts to match
the capabilities of the physical medium over which it will be
transmitted. See also datagram and
fragment.
frame
(1) In communications, the unit
of transmission sent and received by the data link layer, one of the seven
layers defined in the ISO standard.
(2) In hypertext markup language
(HTML) coding, a subset of the Web browser
window.
frame check sequence (FCS)
In
communications, a field in a frame used to determine if the frame was received
without an error.
frame reject (FRMR)
In
communications, a data link command or response used to reject a received
frame. A frame reject is generally used to indicate that the received
protocol data unit is not valid or not
supported.
frame relay
A protocol for
routing frames through the network based on the address field (data link
connection identifier) in the frame and for managing the route or virtual
connection.
framework
(1) A set of classes that
embodies an abstract design for solutions to a family of related
problems.
(2) A set of class libraries
encompassing the following:
Functions (or set of functions) of a particular domain arranged in an
inheritance hierarchy.
An encoded model for use of the framework that defines the relationships
between the classes in the framework and the rules that govern their
use.
Frameworks call the code; the user does not call the
frameworks.
free-form
Pertaining to the
entering of data without regard for rules of format. Contrast with
fixed-form.
frequency modulation (FM)
The
process of regulating the frequency of the carrier wave in accordance with
speech or a signal.
FRMR
See frame reject
(FRMR).
front page
The Web page that the
ADMIN server instance serves for the Internet Connection Server for
AS/400.
FTAM
See file transfer,
access, and management (FTAM).
FTP
See File Transfer
Protocol (FTP).
FTS
See file transfer
support (FTS).
FULIC
See feature-unique
Licensed Internal Code (FULIC).
full backup
The process of
copying all the files on a system. Contrast with incremental
backup and cumulative
backup.
full DST capability
A dedicated
service tools (DST) capability used by a service representative or an
experienced system user that provides access to all DST functions except
changing DST passwords. See also basic DST capability and
security DST capability.
full duplex
Synonym for
duplex.
full menus
A choice that allows a
user to see all of the choices available on the
menus.
full name
In the DCE Cell
Directory Service (CDS), the complete specification of a CDS name, including
all parent directories in the path from the cell root to the entry being
named.
full notebook
A choice that
allows a user to see all of the choices available in the
notebook.
full pointer
In DCE Remote
Procedure Call (RPC), a pointer without the restrictions of a reference
pointer.
full procedural file
In RPG, a
file that uses input operations controlled by programmer-specified operation
codes instead of by the program cycle. Contrast with primary
file.
full save operation
In Backup
Recovery and Media Services, a backup operation that includes all objects,
libraries, or folders in a control group regardless of whether they have been
changed since the last backup operation or archive
operation.
full-screen editor
A program that
allows users to edit an entire screen of data or text at one
time.
fullselect
In SQL, that form of
the SELECT statement that includes ORDER BY or UNION
operators.
fullword binary
In DB2 UDB for
AS/400, a binary number with a precision of 31 bits. See also
integer.
fully bound binding handle
In DCE
Remote Procedure Call (RPC), a server binding handle that contains a complete
server address including an endpoint. Contrast with partially
bound binding handle.
fully qualified domain name (FQDN)
In the
Internet suite of protocols, the name of a host system that includes all of
the subnames of the domain name. An example of a fully qualified domain
name is rchland.vnet.ibm.com. See also host
name.
function
(1) Any instruction or set
of related instructions that perform a specific operation.
(2) In the C language, a named
group of statements that can be called and evaluated and that can return a
value to the calling statement.
(3) In REXX, a series of
instructions that a REXX procedure calls to perform a specific task and to
return a value. The three types of routines that can be called as
functions are internal, built-in, and external.
(4) In SQL, an operation that
supplies a single value from another value or from a set of values. A
function obtains a single value by applying the function name (for example,
AVG) to the result of the expression (for example, column-name). See
also column function and scalar function.
(5) In capacity planning, a set of
transactions performed by a user to accomplish a task such as calendar update,
send main, and so on. A function may be comprised of interactive and
non-interactive transactions.
functional unit
(1) Hardware,
software, or a combination of hardware and software that is capable of
accomplishing a specified purpose.
(2) In OSI, a logical
grouping of related services. See also session functional
unit.
function call
In REXX, the
process of calling a set of instructions that must return a result.
Function calls can be included in an expression anywhere that a term would be
valid.
function check
A notification
that an unexpected condition has stopped the running of a
program.
function code
In the OfficeVision
program, an abbreviation of 1 to 6 characters that a user types to tell the
system to do some action in the calendar function. See also
calendar user-defined function
code.
function control sequence (FCS)
A
multiple-leaving telecommunications access method (MTAM), control character
that controls the flow of individual function
streams.
function field
In the
OfficeVision program, the field in which a user types a function code of 1 to
6 alphanumeric characters to request a calendar
function.
function key
A keyboard key that
allows the user to select keyboard functions or programmer functions.
Contrast with character
key.
function key indicator
In RPG, an
indicator that is set on when a valid corresponding function key is
pressed. Valid function key indicators are KA through KN and KP through
KY.
function management header (FMH)
In SNA, a
record that contains control information for the data that
follows.
function name
In COBOL, an
IBM-defined name that identifies system logical units, system-supplied
information, printer control characters, and program
switches.
function shipping
The process
whereby CICS accesses resources when those resources are actually held on
another CICS system.