Glossary

You can refer to this glossary for definitions and helpful information pertaining to terms presented in this manual.

ACCESS

Attribute that indicates the relationship that exists between record-types.

Access File

Is an extension of Master File syntax designed specifically for the peculiarities of the IDMS DBMS. The Access File provides information to map DML record-types and LRF-based records, including record and area names and, where needed, set or field name information.

ACCESS PDS

The data set name of the Access File PDS onto which the new member will be generated.

Access segment declarations

Indicate the IDMS record information and parent/descendant relationship for each network record-type or LRF record described as a segment in a Master File.

ALIAS

The ALIAS attribute specifies an alternative name for FIELDNAME. An alias may be to up 12 characters in length and must be unique.

ASF

Automatic System Facility. This facility generates subschemas and navigational paths based on the user’s menu selection.

AUTOIDMS

Process that uses a series of Dialogue Manager FOCEXECs and standard TABLE requests to automatically create Master and Access Files for network record-types.

Bill-of-materials

Two record types linked by more than one set.

Common member

A record-type that is a member of two or more sets.

Common owner

A record-type that is the owner of two or more sets.

CRFILE

Attribute that is specified only for segments that are described remotely in another Master File.

CV

Central Version.

DBA

Database Administrator.

DBMS

Database Management System.

DBNAME

The DBNAME attribute supports multiple database access. It can be used in local or Central Version mode to translate the subschema name into the proper load modules for data access.

DDS

Distributed Database Systems.

DICTNODE

Supports secondary dictionaries in DDS environments.

DMCL

Device Media Control Language.

DML

Data Manipulation Language. DML access is the traditional method of IDMS database navigation. It is the network navigation facility.

Entity Relationship diagram

IDMS representation of record-types and set relationships within a database.

GETOWN

The GETOWN attribute allows or inhibits GET OWNER calls which obtain the owner records from a member record-type.

GROUP

The GROUP attribute identifies a set of fields following it with a single name. This GROUP name is any unique name up to 12 characters in length.

IDD

Integrated Data Dictionary.

IDMS

Integrated Database Management System.

Index-Based Retrieval

Using embedded cross-references, the field in the descendant segment represents an index on the IDMS record-type. The adapter uses the value from the parent segment and performs entry-level IDMS retrieval by “walking” the index set.

I/O

Input/Output.

Index declarations

Provide information about each IDMS index.

Integrated Index

A method of indexing where the database management system handles all index access and maintenance.

KL

The KL segment type is used when several Master Files are constructed for the same IDMS subschema. It is used if the underlying segment is non-unique (S).

KLU

The KLU segment type is used when several Master Files are constructed for the same IDMS subschema. It is used if underlying segment is unique (U).

Loop structures

Implement complicated relationships among record-types.

LR

Logical Records.

LRF

Logical Records Facility. LRF access is the “relational-like” method of access. LRF provides software to dynamically create “flat” records from one or more network record-types at run time.

MA

Mandatory/Automatic.

Master File

Contains attributes in comma-delimited format that define the field name for IDMS fields and segment relationships.

MASTER FILENAME

The name of the Master File to be generated; up to eight characters in length.

MASTER PDS

The data set name of the Master File PDS onto which the new member will be generated.

MEMBER NAME

The user ID to be created on the Master and Access File partitioned data sets. Up to eight characters in length.

MM

Mandatory/Manual.

Multi-member set

A set that contains more than one member record-type.

NODE

The NODE attribute supports IDMS Distributed Database Systems. The value for NODE is the IDMS data dictionary table entry that identifies the DDS node location of an IDMS distributed database.

OA

Optional/Automatic.

OM

Optional/Manual.

ORDER

The ORDER attribute creates a fictitious count field that may be decoded.

PDS

Partitioned data sets.

POSITION

The POSITION attribute directs FOCUS to OCCURS segments when non-repeating fields exist between repeating fields.

READY

Specifies when an LRF record is built from two or more physical record-types located in several databases.

SEQFIELD parameter

A method of index retrieval that does not require selection criteria and yet prohibits area sweeps on entry segments.

SEGNAME

The segment name may be a maximum of eight characters and must be unique within a given Master File.

SEGTYPE

Attribute that indicates whether a segment occurs once or many times.

SET

Implements a one-to-many relationship between record-types. The FOCUS equivalent of a set is the parent/descendant relationship between segments.

SETMBR

The SETMBR attribute specifies whether set membership is mandatory/automatic, mandatory/manual, optional/automatic, or optional/manual.

Simple set

A set relationship that corresponds to a parent/descendant relationship.

Subschema declarations

Identify the subschema used, the IDMS release under which the subschema was compiled, the calling mode to be used to retrieve records, and whether a trace is produced.

SUBSCHEMA NAME

IDMS subschema used to create the Master and Access Files. Up to eight characters in length.

TED

System editor.

TRACE

Specifies whether a basic trace of all IDMS calls or a detailed list of all the parameters passed to IDMS will be displayed. The default is set for no trace.

TSO

Time Sharing Option.

UCF

Universal Communications Facility.


Information Builders