VMS Help DTM, SHOW, COLLECTION, Command Qualifiers, /CLASS  *Conan The Librarian (sorry for the slow response - running on an old VAX)

   /CLASS=(keyword=class-name,...)

   Specifies the optional CMS class for benchmark files and template
   files stored in CMS libraries. The keywords, BENCHMARK and
   TEMPLATE, designate the name of the specific set of generations of
   elements. If you do not specify a class and the file is stored in
   a CMS library, the latest generation on the main line of descent
   is used.

   You can specify the same class names for your benchmark and
   template files. If you specify both keywords, separate them with a
   comma and enclose the list in parentheses. If you specify only one
   keyword, omit the parentheses.