//DD7  DD  DSNAME=TOM1,DISP=(NEW,KEEP),EXPDT=2006/033,
//         UNIT=SYSDA,SPACE=(TRK,(1,1)),VOLUME=SER=663344

In this example, the data set is not eligible for being deleted or written over until February 2, 2006.

//SMSDS2  DD  DSNAME=MYDS2.PGM,DATACLAS=DCLAS02,DISP=(NEW,KEEP),
//            EXPDT=2001/033

In this example, the expiration date of February 2, 2001 overrides the expiration date defined in the data class for the data set.