IBM OS/390 manual Summary of MVS JCL Statements, MVS Job Control Statements, JCL Statement Purpose

4.3.13 Summary of MVS JCL Statements

Table 8. MVS Job Control Statements

JCL Statement		Purpose
//	command	Enters an MVS system operator command
		through the input stream. The command
		statement is used primarily by the operator. Use
		the COMMAND statement instead of the JCL
		command statement.
//	COMMAND	Specifies an MVS or JES command that the
		system issues when the JCL is converted. Use
		the COMMAND statement instead of the JCL
		command statement.
//*	comment	Contains comments. The comment statement is
		used primarily to document a program and its
		resource requirements.
// CNTL		Marks the beginning of one or more program
		control statements.
//	DD	Identifies and describes a data set. Indicates the
		end of data placed in the input stream. Note: Any
		two characters can be designated by the user to
		be the delimiter.
//	ENDCNTL	Marks the end of one or more program control
		statements.
//	EXEC	Marks the beginning of a job step; assigns a
		name to the step; identifies the program or the
		cataloged or in-stream procedure to be executed
		in this step.
//	IF/THEN/ELSE/ENDIF	Specifies conditional execution of job steps within
		a job.
//	INCLUDE	Identifies a member of a partitioned data set
		(PDS) or partitioned data set extended (PDSE)
		that contains JCL statements to be included in
		the job stream.
//	JCLLIB	Identifies the libraries that the system will search
		for INCLUDE groups and Procedures named in
		EXEC statements.
//	JOB	Marks the beginning of a job; assigns a name to
		the job.
//		Marks the end of a job.
//	OUTPUT	Specifies the processing options that the job
		entry subsystem is to use for printing a SYSOUT
		data set.
//	PEND	Marks the end of an in-stream or cataloged
		procedure.
//	PROC	Marks the beginning of an in-stream procedure
		and may mark the beginning of a cataloged
		procedure; assigns default values to parameters
		defined in the procedure.
//	SET	Defines and assigns initial values to symbolic
		parameters used when processing JCL
		statements. Changes or nullifies the values
		assigned to symbolic parameters.

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