Subparameter definition

*.ddname

*.stepname.ddname

*.stepname.procstepname.ddname

Specify a backward reference to an earlier DD statement. The referenced DD statement cannot name a cataloged data set or refer to another DD statement.

*.ddname: Specifies the ddname of an earlier DD statement in the same step.
*.stepname.ddname: Specifies the ddname of a DD statement in an earlier step, stepname, in the same job.
*.stepname.procstepname.ddname: Specifies the ddname of a DD statement in a cataloged or in-stream procedure called by an earlier job step. Stepname is the name of the job step that calls the procedure and procstepname is the name of the procedure step that contains the DD statement.

Do not reference a DD * or a DD DATA statement.