1.$ MERGE/KEY=(SIZE:4,POSITION:3)/NOCHECK_SEQUENCE  PRICE1.DAT, -
      _$ PRICE2.DAT PRICE.LIS

      The /NOCHECK_SEQUENCE qualifier specifies that the sequence
      of the input files, PRICE1.DAT and PRICE2.DAT does need not
      be checked. (Checking is not necessary because the records
      in those files are sorted on the same key and the sequence of
      records is correct.)

    2.$ MERGE/SPECIFICATION=PAYROLL.SRT/CHECK_SEQUENCE -
      _$ MAY3.DAT,MAY10.DAT,MAY17.DAT,MAY24.DAT TOTAL.LIS

      In this example, the specification file, PAYROLL.SRT includes
      the /NOCHECK_SEQUENCE qualifier. The /CHECK_SEQUENCE qualifier
      on the MERGE command line is necessary to override the
      /NOCHECK_SEQUENCE qualifier in the specification file. The
      sequence of records in the four input files are to be checked.