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

 filespec[,...] or filespec[+...]

    Specifies one or more intermediate binary files (.BRN) that
    contain information (chapter titles, header levels, sections,
    and so on) for making a table of contents. To create a .BRN file,
    use the RUNOFF command with the /INTERMEDIATE qualifier. See
    the RUNOFF command for more information on the /INTERMEDIATE
    qualifier.

    If you omit the input file type, the DSR Table of Contents
    utility uses a default file type of .BRN. The RUNOFF/CONTENTS
    command also processes BTC files that the previous version of DSR
    produced.

    For single input files, the DSR Table of Contents utility
    produces an output file with the same file name as the input
    file. The output file type is .RNT.

    If you separate multiple input files with commas (,),  separate
    .RNT files for each input file are created. If you separate
    multiple input files with plus signs (+),  a single .RNT file
    that contains table of contents information for all of the input
    files is created. The default output file name is the same as the
    first input file name; the default file type is .RNT. Wildcard
    characters are not allowed in the file specification.