Memorex LOCK - VERSION 2-24 Especificaciones Pagina 183

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Specifying the DD Statement Special DD Names
Chapter 6. BIM-EPIC DD Statements 6-5
Special DD Names
Many ddnames have special purposes in MVS. This affects how the BIM-EPIC DD facility
processes them.
Statements containing unsupported ddnames are ignored by the BIM-EPIC DD system and
treated as comments by VSE. Use standard VSE JCL to define datasets processed with these
names.
The following ddnames are not supported:
JOBLIB
STEPLIB
SYSCHK
SYSCKEOV
SYSOUT
SYSPRINT (changed automatically to SYSOUT)
The following ddnames have special meaning to BIM-EPIC. If a program's DTF uses one of
these names for a different purpose, use standard VSE JCL to define the dataset.
JOBCAT
STEPCAT
SYSABEND
SYSMDUMP
SYSUDUMP
SYSIN
JOBCAT and STEPCAT define VSAM catalogs to be used for VSAM clusters. In the BIM-
EPIC DD facility (but not in MVS), they also define catalogs to be used for VSAM/SAM
datasets.
JOBCAT defines the catalog for the entire job stream. STEPCAT defines the catalog for a
step. STEPCAT overrides a JOBCAT definition for that step.
A JOBCAT DD must immediately follow the JOB statement. A STEPCAT DD must precede
all VSAM labels which require that catalog.
//JOB VSAM UPDATE
* //JOBCAT DD DSN=VSAM.JOB.CATALOG,DISP=SHR
.
* //STEPCAT DD DSN=VSAM.STEP.CATALOG,DISP=SHR
vsam labels
// EXEC PROGRAM
/&
Description
Unsupported DD
Names
DD Names with
Special Meanings
JOBCAT and
STEPCAT
Example
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