Glossary

This publication includes definitions developed by the American National Standards Institute (ANSI) and the International Organization for Standardization (ISO). This material is reproduced from the American National Dictionary for Information Processing, copyright 1977 by the Computer and Business Equipment Manufacturers Association, copies of which may be purchased from the American National Standards Institute, 1430 Broadway, New York, New York 10018.

The following terms are defined as they are used in this manual. If you do not find the term you are looking for, refer to the Index or to the IBM® Dictionary of Computing.

ANSI definitions are preceded by an asterisk.

 A 
across format
A Z Data Tools dump format that has the same appearance as a system dump. To get this format for your listings, use the SET DUMP=ACROSS processing option.
action bar
The area at the top of a window that contains choices that give a user access to choices available in that window.
ASCII
* American National Standard Code for Information Interchange. The standard code, using a coded character set consisting of 7-bit coded characters (8-bits including parity check), that is used for information interchange among data processing systems, data communication systems, and associated equipment. The ASCII set consists of control characters and graphic characters.
 B 
block
* A collection of contiguous records recorded as a unit. Blocks are separated by interblock gaps and each block may contain one or more logical records.

A block is a physical record but it may be composed of several contiguous logical records or parts of logical records.

blocking
The process of combining two or more logical records in one block.
BLP
Bypass label processing.
bounds
In editor functions, the default column range within which commands operate. In editor functions, the bounds can be changed using the BOUNDS command.
buffer
A portion of storage used to hold input or output data temporarily.
 C 
cards
Lines in a batch job.
cartridge
A storage device that consists of magnetic tape, on supply and takeup reels, in a protective housing.
catalog
* A directory of files and libraries, with reference to their locations. A catalog may contain other information such as the types of devices in which the files are stored, passwords, and blocking factors. * To enter information about a file or library into a catalog.
character fill
* To insert as often as necessary into a storage medium the representation of a specified character that does not itself convey data but may delete unwanted data.
CKD
Count key data, a disk architecture.
collection
See object collection.
column range
In editor functions, the left and right columns that control which data is processed by edit commands. Some editor commands allow you to specify a column range to override the bounds.
console
See operator console.
control interval
A fixed-length area of direct access storage in which VSAM stores records and creates distributed free space. Also, in a key-sequenced data set or file, the set of records pointed to by an entry in the sequence-set index record. The control interval is the unit of information that VSAM transmits to or from direct access storage. A control interval always comprises an integral number of physical records.
copybook
In general, a copybook is a file containing a sequence of code that is included in a source program at compile time. In Z Data Tools, the term “copybook” refers specifically to a file containing descriptions of record structures.
cylinder
The tracks of a disk storage device that can be accessed without repositioning the access mechanism.
 D 
data definition (DD) statement
A job control statement describing a data set associated with a specific job step.
data definition name (ddname)
The name of a data definition (DD) statement that corresponds to a data control block that contains the same name.
data-in-virtual data set
A data set that is considered a continuous stream of uninterrupted data.
DBCS
Double-byte character set.
deblocking
The process of making each logical record of a block available for processing. Contrast with blocking.
 E 
EBCDIC
* Extended Binary-Coded Decimal Interchange Code. A coded character set consisting of 8-bit coded characters.
end of file (EOF)
An internal label or special record immediately following the last record of a file, signaling the end of that file. It may include control totals for comparison with counts accumulated during processing.
end of volume (EOV)
An internal label, or 2 consecutive tape marks, that follows and indicates the end of a set of data contained in a volume.
excluded record
In edit functions, a record that has been excluded from display using the EXCLUDE primary command or the X prefix command.
extended help
Help text that applies to an entire function or panel. Contrast with field help.
extent
Continuous space on a disk that is occupied by or reserved for a particular data set, data space, or file.
 F 
field help
Help text that applies to a specific entry field, parameter, or term. Contrast with extended help.
field mapping
The relationship between fields in the “from” data set and fields in the “to” data set. Field mapping defines which fields in the “from” data set are copied to which fields in the “to” data set. The field mapping is defined using the Template Workbench.
field list
When data is displayed in TABL or SNGL display format, specifies which fields an editor command is to operate on.
file, tape
See tape file.
fill
See character fill.
full-screen mode
A type of Z Data Tools session, in which you can use full-screen panels to select functions, specify parameters, view data, and update data.
 H 
header label
An internal label, immediately preceding the first record of a file, that identifies the file and contains data used in file control.
 I 
interactive (processing)
Pertaining to an application in which each entry calls for a response from a system or program, as in an inquiry system or an airline reservation system. An interactive system may also be conversational, implying a continuous dialog between the user and the system.
 K 
KSDS
Key-sequenced data set.
 L 
label
A record that identifies a volume on tape or disk or that identifies a file on the volume.
label, header
See header label.
label, record
See record label.
line command
In full-screen mode, a command that you can enter on any list panel by typing the command over the beginning of a list entry.
linear data set
A named linear string of data, stored in such a way that it can be retrieved or updated in 4096-byte units.
list panel
In full-screen mode, a panel that displays a list of entries such as data sets, members, or objects, and that enables you to perform functions on one or more of the entries.
logical record
A record from the standpoint of its content, function, and use rather than its physical attributes, that is, a record defined in terms of the information it contains. In VSAM, a unit of information normally pertaining to a single subject; a logical record is the user record requested of or given to the data management function.
 M 
multiple record types
Records in a single file that are of different lengths or contain different types of data.
 N 
not-selected record
A record that has not been selected for processing by the function because it does not meet the record identification criteria or the record selection criteria.
object
In OAM, data consisting of a contiguous stream of bytes of arbitrary length, up to a maximum of 15 megabytes. The contents and internal structure of an object are defined by the application using it. Objects are increasingly used in image processing and other advanced application areas.
object collection
A collection of user-defined objects.
operator console
A functional unit containing devices that are used for communications between a computer operator and a computer.
 O 
OAM
Object Access Method.
 P 
parameter string
Two or more parameters separated by commas or blanks.
PDS
Partitioned data set.
physical record
A record whose characteristics depend on the manner or form in which it is stored, retrieved, or moved. A physical record may contain all or part of one or more logical records.
prefix commands
In full-screen mode, commands you enter in the prefix area of the panel. Prefix commands are used by Z Data Tools edit functions.
primary command
In full-screen mode, commands you enter on the Command line. Z Data Tools provides common primary commands that are available across a range of functions, and function-specific primary commands, such as editor commands.
 Q 
QSAM
Queued Sequential Access Method, an access method for sequential data sets.
 R 
record identification criteria
Criteria that are used to identify different record types in a file. The two types of record identification criteria are implicit and explicit. The default (implicit) record identification criteria are the minimum and maximum lengths of records of a given record type. Explicit record identification criteria are criteria you specify using the Template Workbench.
record label
In edit functions, an alphabetic character string used to name a particular record for easy reference.
record label range
In edit functions, a pair of record labels specified in an edit command to define the records on which the command is to operate.
record selection criteria
Criteria that are used for selecting records for processing by a function, and specified using the Template Workbench.
record size
The number of characters or bytes in a record.
record type
The set of records in a single file that are the same length or contain the same type of data.
RRDS
Relative record data set.
 S 
SAF
System Authorization Facility, a system facility for security.
service provider
Z Data Tools Service Provider for IBM z/OS® Connect Enterprise Edition, which enables client applications to access IBM Z data sources using z/OS Connect.
shadow line
In editor functions, a line that indicates the position of records that have been excluded from display. A shadow line can represent excluded records, not-selected records, or suppressed records.
shift-out/shift-in
Characters that mark the beginning and end of double-byte character set data. The shift-out character is X'0E', and the shift-in character is X'0F'.
SMS
Storage Management Subsystem.
standard label
A fixed-format record that identifies a tape that is part of a multivolume tape file.
suppressed record
In editor functions, a record that has been selected for processing by the function, but is of a different record type to the currently displayed record type.
 T 
tape file
One or more data blocks between tape marks.
tape mark
An indicator record that marks the beginning or the end of a set of data such as a file.
tape unit
A device containing a magnetic tape drive, magnetic heads, and associated controls.
tape volume
A reel of magnetic tape.
template
A set of information, created using the Template Workbench, that describes the format of records in a file, how different record types are identified, what records and fields are to be selected for processing, how fields are to be presented when displayed or printed, how records are to be mapped when copied from one file to another, and how fields are to be initialized.
Template Workbench
A series of Z Data Tools panels. With the Template Workbench you can specify the name of a copybook that describes your data, and you can create and edit a template that specifies which records and fields within your data set you want to process.
 U 
unit, tape
See tape unit.
updown format
A Z Data Tools dump format with hexadecimal representation of data in 3 lines: character, zone, and number. To get this format for your listings, use the SET DUMP=UPDOWN processing option.
utility program
A computer program in general support of computer processes; for example, a diagnostic program, a trace program, a sort program.
 V 
volume
Tape volume: A reel of magnetic tape. Disk volume: A disk pack or part of a disk storage module.
volume serial number (volser)
A number in a volume label assigned when a volume is prepared for use in the system.
volume table of contents (VTOC)
A table on a direct access volume that describes each file on the volume.
VSAM
Virtual Storage Access Method.
 W 
WLP
Websphere Liberty Profile.