You can mask data that varies in test results from one
  test run to the next using DTM filters. You can also
  mask data during the recording of a test to produce a
  filtered benchmark file.

  DTM filters change specified data types (like time
  stamps) to ASCII characters of a standard format. For
  example, a OpenVMS time stamp of 13:20:23.0002 can be
  changed to hh:mm:ss.xxxx.

  The following table lists the available filters:

  Keyword     Filter

  ALL         Specifies that all the filters in this
              table be used
  DATE        Where the date form is abbreviated, the
              date filter replaces date stamps by
              substituting a "d" for each displayed
              number of the day of the month, an "m"
              for each displayed letter of the month,
              and a "y" for each displayed number of the
              year. Where the date form is spelled out,
              the month name is replaced by "month", the
              numeric day is replaced by "day", and the
              year is replaced by "year".

              The following list shows some examples of
              the date filtering functions; this list is
              not all inclusive.

                  17-OCT-1998 with dd-mmm-yyyy
                  17 OCT 98 with dd mmm yy
                  98.OCT.17 with yy.mmm.dd
                  10/17/98 with mm/dd/yy
                  1998/10/17 with yyyy/mm/dd
                  October 17, 1998 with month day, year
                  Oct. 17, 1998 with month day, year
                  17.October.1998 with day.month.year
                  98-October-17 with year-month-day

  TIME        Replaces time stamps with the following
              forms:

                  15:37:53.22 with hh:mm:ss.xxxx
                  15:37:53 with hh:mm:ss
                  15:37 with hh:mm
                  3:37 PM with hh:mm xm
                  15H37m with hhHmmm
                  15H37' with hhHmm'
                  15.37 h with hh.mm h
                  15 h 37"53 s with hh h mm"ss s
                  15 h 37 min with hh h mm min
                  kl 15.37 with kl hh.mm
                  h 15.37 with h hh.mm

  FILE_NAMES  Replaces the file names with FILENAME.EXT
  DIRECTORIES Replaces the directory specification
              field in the file specification with
              DISK:[DIRECTORY]
  TRACE_BACK  Replaces 32-bit memory addresses with
              xxxxxxxx and 64-bit memory addresses with
              xxxxxxxx xxxxxxxx
  VERSION     Replaces file versions with VERSION