Symbolic parameters can be used in the in-stream datasets. Unlike symbolic substitution in the JCL stream of a job, which is performed by the JCL converter during processing of JCL statements, in-stream symbolic substitution is performed by JES when an in-stream data set is read.
This is achieved by “EXPORT SYMLIST”, “SYMBOLS=JCLONLY” parameters.
Example 1
//TESTJOB JOB….
//*
// EXPORT SYMLIST=*
// SET HLQ1=USERID
//*
//DELETES EXEC PGM=IDCAMS
//SYSPRINT DD SYSOUT=*
//SYSIN DD *,SYMBOLS=JCLONLY
DELETE &HLQ1..DSN1
DELETE &HLQ1..DSN2
/*
Example 2
//REALLOC JOB 1,TESTJOB,
// MSGLEVEL=(1,1),CLASS=A
//*
//E1 EXPORT SYMLIST=(DSNAME)
//E2 EXPORT SYMLIST=(VOLSER)
//S1 SET DSNAME=HASP.TEST.MACLIB
//S2 SET VOLSER=J2COM1
//*
//DEALLIB EXEC PGM=IDCAMS,REGION=300K
//DD1 DD UNIT=3390,DISP=OLD,VOL=SER=&VOLSER
//SYSPRINT DD SYSOUT=*
//SYSIN DD *,SYMBOLS=JCLONLY
DELETE &DSNAME
NONVSAM PURGE SCRATCH FILE(DEVICE)
//*
//REALLIB EXEC PGM=IKJEFT01,REGION=300K
//SYSTSPRT DD SYSOUT=*
//SYSTSIN DD *,SYMBOLS=JCLONLY
ALLOCATE DSNAME('&DSNAME.')
UNIT(3390) VOLUME(&VOLSER.)
NEW CATALOG DSNTYPE(LIBRARY)
SPACE(65,15) DIR(56) TRACKS
/*
More information about this facility can be found in
https://www.ibm.com/docs/en/zos/2.3.0?topic=symbols-using-in-jes-in-stream-data
