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4.3.12 Comparison of VSE and MVS JCL - A Summary
Below is a summary of VSE JCL statements and possible equivalents in MVS.
Table 7 (Page 1 of 2). VSE Job Control Statements Summary
VSE
Statement
Function MVS Equivalent
ASSGN Used at execution time to assign a
specific device address to the
symbolic unit name used.
// DD UNIT=
CLOSE Closes either a system or a
programmer logical unit assigned to
tape, disk, or diskette.
No equivalent in OS/390.
Units closed automatically
at end-of-step, or by the
application program.
DATE Contains a date that is put in the
communications region.
No equivalent in OS/390.
DLBL Contains file label information for
disk or diskette label checking and
creation.
// DD DSName=
EXEC Indicates the end of job control
statements for a job step and that
the job step is to be executed.
// EXEC PGM= (Must
precede DD statements for
the step.)
EXEC PROC Calls a cataloged procedure and
defines values for symbolic
parameters.
// EXEC PROC= (″PROC=″
is optional)
EXTENT Defines each area, or extent, of a
disk file or diskette volume.
// DD VOLUME= SPACE=
DATACLAS=
GOTO Causes JCL to skip all following
statements (except JOB, /&, /+) up
to the specified label statement.
No direct equivalent in
OS/390. Use CONDitional
step processing or
IF/THEN/ELSE/ENDIF
ID Used to specify user identification
and password.
// JOB USER=
PASSWORD=
IF Causes skipping or execution of the
following statement dependent on
the specified condition.
// IF
JCLEXIT Activates or deactivates one or
more JCL exit routines.
Not applicable in OS/390.
JOB Indicates the beginning of control
information for a job.
// JOB
LIBDEF Defines library chains. // STEPLIB DD,
// STEPCAT DD, or
// JCLLIB
LIBDROP Drops library chain definitions. No equivalent in OS/390.
LIBLIST Lists library chain definitions. No equivalent in OS/390
LIBSERV Controls 3494 tape system. No equivalent in OS/390
LISTIO Used to get a listing of I/O
assignments on SYSLOG or SYSLST.
No equivalent in OS/390
MTC Controls operations on magnetic
tapes.
// DD LABEL
86 VSE to OS/390 Migration Workbook