/sys$common/syshlp/helplib.hlb EDIT, /SUM, Qualifiers, /OUTPUT  *Conan The Librarian (sorry for the slow response - running on an old VAX)

   /OUTPUT[=file-spec]

   Specifies the output file to be used in the editing session.  If you
   do not include a file specification, the output file has the same
   name and type as the input file, with a version number one higher
   than the highest existing version.