Positional Parameters in DD Statements

In Positional parameters, four parameters are there,

They are

a) Instream Data (*)

The * parameter value begins in-stream data set.

b) Data

The DATA parameter value begins an in-stream data set that may contain statements with // in columns 1 and 2/

c) Dummy

The DUMMY parameter value tells z/OS not to perform any I/O, or disposition processing on the data set.

d) DYNAM

The DYNAM parameter value is supported only to provide compatibility with previous versions of the z/OS.