In this example, two sequential data sets (input stream and tape) are compared.

  //CARDTAPE JOB  ...
  //         EXEC PGM=IEBCOMPR
  //SYSPRINT DD  SYSOUT=A
  //SYSIN    DD  DUMMY
  //SYSUT2   DD  UNIT=tape,VOLUME=SER=001234,LABEL=(,NL),
  //             DCB=(RECFM=FB,LRECL=80,BLKSIZE=2000),
  //             DISP=(OLD,KEEP)
  //SYSUT1   DD  DATA
 
  (input data set)
 
  /*

The control statements are discussed, as follows::

• SYSIN DD defines a dummy control data set. Because no user routines are provided and the input data sets are sequential, utility control statements are not necessary.
• SYSUT2 DD defines an input data set, which resides on an unlabeled, tape volume.
• SYSUT1 DD defines a system input stream data set.