This document covers the following topics:
Adabas Control Block (see Adabas Command Reference documentation).
Application Control Block (DL/I term). DL/I internal control blocks
which combine the PSB and DBD information.
DL/I ACBs are not used by ADL.
Adabas Bridge for DL/I.
Synonym for ADL Directory file.
An Adabas file used to store all DBD,
PSB and system related information relevant to ADL. Also
referred to as the ADL control
file.
Generic term for any Adabas file which results from the conversion of a DL/I data base.
A program for maintaining the ADL Interfaces under CICS and for retrieving information from the ADL Directory file.
A module containing all system relevant parameters for ADL (see ADL Parameter Module in the ADL Installation documentation).
The ADL supplied precompiler to translate EXEC DL/I
commands in COBOL or PL/I programs into calls to ADL. Thus the
HLPI becomes obsolete.
A program which communicates with the database system through
CBLTDLI, PLITDLI or ASMTDLI call
statements.
The ADL interface to intercept DL/I data base calls from command level or call level application programs.
The ADL supplied utility programs for the control block conversion.
One of the segment types or occurrences directly depending on another
segment type or occurrence. The child segment types are all those segment types
referring to another segment type in the PARENT= parameter of the
SEGM macro.
A program which communicates with the database system through
"EXEC DLI" statements.
Identifies, by the means of key fields, the position of a segment occurrence in the data base. The concatenated key of a segment occurrence is built up from all individual key fields of its parent segment occurrences (top - down) including its own key field.
The process of transforming a DBD or PSB source into an entry in the ADL Directory file.
The ADL interface to intercept Adabas database calls.
The ADL batch region controller (to replace the DL/I batch region controller).
The ADL parameter module.
A program to test DL/I calls in batch.
Data Base Definition. Defines the layout of a physical, logical or secondary index DL/I data base. The user defines a DL/I data base by calls to various assembler macros.
The source code for the definition of a DL/I data base.
An entry in the ADL Directory file for one particular DL/I database.
DL/I interface block. An area used for communication between the data base system and a command level application.
A generic term for DL/I DOS/VS and IMS/VS used throughout the entire ADL documentation.
External Control Block. A DBD or
PSB control block as used by ADL in its
external (address free) format. ECBs are stored in the
ADL Directory file.
File Description Table.
Describes the layout of an Adabas file.
A table used internally by ADL to describe the layout of an ADL file.
A sub-element of a DL/I segment.
An element of an Adabas file structure.
Adabas term used to designate an Adabas field which is built up from lower level field definitions.
High Level Programming Interface. Provides the link between command level programs and the DL/I data base system. This module becomes obsolete for command level programs which have been precompiled with the ADL precompiler.
Internal Control Block. A DBD or PSB control block as used by ADL in its internal format. During initialization of ADL, the relevant ECBs are converted into ICBs.
DL/I.
An internal Adabas field, which is used by ADL to reflect the hierarchical structure of the data. Internal pointer fields are based on the logical IDs, ISNs, and sequence field values of the records in an ADL file.
DL/I delivers segment data to this area (GET-calls) or
receives segment data from the application (ISRT/REPL-calls) in
this area. A common I/O area can be defined for all segments to be processed in
one application program. In this case, the size of the I/O area must be
identical to the size of the longest segment to be processed.
Internal Sequence Number. Each logical record within an Adabas file is assigned an ISN which serves as a logical identifier. ISNs are unique within a file. For ADL files, this ISN is assigned by ADL and cannot be changed by the user.
This interface provides language dependent entry points for
CALLDLI statements for the most commonly used languages
(COBOL, PL/1, BAL). The language interface routes the data base
requests to the DL/I request handler.
An area used internally by ADL to store the last Adabas call for each sensitive segment. This area can help to improve performance.
Every DBD in a logical relationship must be assigned to a unique logical ID. It is stored in the ADL Directory file and used to build up the internal pointer fields.
In ADL files, logical pointers are Adabas fields which contain key values that provide the hierarchical relationship between records. Logical pointers are used by Natural applications.
Loop.
A DL/I application running under control of ADL, accessing ADL files concurrently with non-converted DL/I databases.
Adabas feature to reduce the communication overhead between the application program and the Adabas nucleus. Can be activated automatically by the ADARUN PREFETCH parameter.
A table which defines the number of records returned by the Adabas
Multifetch feature for specific
PCB/SENSEG combinations.
A DL/I application accessing ADL files only.
The direct parent segment type or occurrence of a segment type or
occurrence. The parent segment type is defined in the PARENT=
parameter of the SEGM macro in the DBD.
The part of the concatenated key of a segment occurrence for one particular level in the hierarchy.
Program Communication Block.
A PCB definition in a PSB defines the view of a DL/I database for the
application program.
The data area used for communication between the data base system and
the application program. The user has to define a PCB mask for this purpose in
the application program. The data areas corresponding to the PCB definitions in
a PSB are provided by the data base system
at the time when the PSB is initialized.
A user coded layout (Assembler DSECT, COBOL data definition
etc.) of the PCB.
Functional subset of Multifetch.
Program Specification Block. Defines the user views (PCBs) of a DL/I data base as available for an application program.
An entry in the ADL Directory file for one particular PSB.
A list to increase the record buffer length for specific
PCB/SENSEG combinations. This reduces the number of records
returned by the Adabas Prefetch feature.
An Adabas response to a request. The response codes are passed to the user in the ACB.
Segment Description Table. A table used internally by ADL to describe the layout of segments and their implementation in ADL files.
The element type of a DL/I data base structure. A segment is identified by its unique name in the database. Its position in the hierarchical database structure is identified by its level and its ordinal number. The term is sometimes also used for an occurrence of the segment type.
A field defined in a segment which determines the order of segment occurrences of a type. A sequence field may be defined as unique or non-unique. A root segment type must have a unique sequence field defined. A unique sequence field defined for a non-root segment type is not necessarily unique over the entire data base. It is however unique for all segment occurrences under the given parent segment occurrence.
Segment Search Argument. An area which specifies search criteria for one particular segment type in a DL/I data base call.
A DL/I response to a request. The status codes are passed to the user in the PCB.
All segment occurrences of the same type under one specific parent segment occurrence.
User Interface Block. An area used for communication between the data base system and the application program under CICS.
Same as a PCK, but instead of corresponding to a physical child relationship it corresponds to a logical child relationship.