VMS Help BASIC, /CROSS_REFERENCE  *Conan The Librarian (sorry for the slow response - running on an old VAX)

   The  /CROSS_REFERENCE  qualifier  causes  the  compiler  to   generate   a
   cross-reference listing.

   The format of the /CROSS_REFERENCE qualifier is as follows:

      /[NO]CROSS_REFERENCE[=[NO]KEYWORDS]

   The cross-reference listing shows program symbols, their  class,  and  the
   program lines in which they are referenced.  The /CROSS_REFERENCE=KEYWORDS
   qualifier  specifies  that  the  cross-reference  listing   includes   all
   references  to  VAX  BASIC  keywords.   /CROSS_REFERENCE  is  the  same as
   /CROSS_REFERENCE = NOKEYWORDS.

   The  /NOCROSS_REFERENCE   qualifier   suppresses   the   creation   of   a
   cross-reference  listing.   See the Compaq BASIC for OpenVMS Alpha and VAX
   Systems User Manual for more information on cross reference listings.

   The default is /NOCROSS_REFERENCE.