Full_Description

   The /KEY qualifier specifies all the necessary information about
   a key field. If the file is to be sorted using entire records
   with character data in ascending order, you do not need to
   specify the key information.

   When a key field must be described, you must specify both the
   position and the size of the key. In addition, if the sorting
   or merging operation is to be done in descending alphabetic or
   numeric order, specify DESCENDING in the key description.

   If the data in the key fields is not character data, you must
   specify the data type. The following data types are recognized by
   the Sort/Merge utility:

      BINARY, [SIGNED]
      BINARY, UNSIGNED
      CHARACTER
      DECIMAL, LEADING_SIGN, SEPARATE_SIGN [SIGNED]
      DECIMAL, LEADING_SIGN, [OVERPUNCHED_SIGN, SIGNED]
      DECIMAL [,SIGNED, TRAILING_SIGN, OVERPUNCHED_SIGN]
      DECIMAL, [TRAILING SIGN], SEPARATE_SIGN, [SIGNED]
      DECIMAL, UNSIGNED
      D_FLOATING
      F_FLOATING
      G_FLOATING
      H_FLOATING
      PACKED_DECIMAL
      S_FLOATING (Alpha and I64 systems only)
      T_FLOATING (Alpha and I64 systems only)
      ZONED

   The items in brackets are defaults and need not be specified.

   Multiple Keys

   You can specify up to 255 key fields in a sorting operation. If
   you do specify multiple keys, decide which is primary, which is
   secondary, and so on; then, in the command string, list them in
   the order of their priority.

   By default, Sort assigns 1 to the first key specified in the
   command line, 2 to the second key, and so on. If you do not list
   the keys in the order of their priority, specify the order of
   each with the parameter NUMBER:n.

   For each Sort key, you must use a separate /KEY qualifier.
   If Sort finds /KEY parameters repeated after a single /KEY
   qualifier, it does not treat these as specifications for multiple
   keys; instead, the duplicate parameters override previously
   specified parameters.