Temporary data sets are used for storage needed only for the duration of the job. If the DISP parameter doesn’t DELETE the data set by the END of the job, the system will delete it. Deleting a tape data set dismounts the tape, whereas deleting a dataset on a direct-access VOLUME release the storage. A data set is marked temporary by omitting the DSN parameter or by coding DSN=&&dsname. The system ASSIGN a UNIQUE name to the data set when the DSN parameter is omitted, and any subsequent steps using the dataset refer back to the DD statement.

Temporary data sets are used for storage needed only for the duration of the job. If the DISP parameter doesn’t delete the data set by the end of the job, the system will delete it. Deleting a tape data set dismounts the tape, whereas deleting a dataset on a direct-access volume release the storage. A data set is marked temporary by omitting the DSN parameter or by coding DSN=&&dsname. The system assign a unique name to the data set when the DSN parameter is omitted, and any subsequent steps using the dataset refer back to the DD statement.