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

    /CMS
    /NOCMS (D)

    Controls whether MMS looks for source files, description files,
    and include files in the current default CMS library as well
    as in the specified directories. CMS must be installed on your
    system. These qualifiers affect both the execution of action
    lines and the behavior of MMS.

    For information on using the /CMS qualifier with the
    description-file generator, refer to the /GENERATE qualifier.

    When you specify the /CMS qualifier and the source in the CMS
    library is newer, MMS fetches it from the CMS library. If the
    source in the CMS library is older, MMS instead uses the source
    in the specified directory.

    /CMS also directs MMS to look in the current default CMS library
    for a description file and any files included with the .INCLUDE
    directive, or specified with the /RULES qualifier. If MMS does
    not find a description file in either the specified directory or
    the current default CMS library, it aborts execution.

    The /CMS qualifier also directs MMS to apply CMS built-in rules
    where appropriate.

    The /NOCMS qualifier directs MMS not to look in the current
    default CMS library for source files, description files, rules
    files, or include files. However, if any file specifications in
    the description file are followed by a tilde (~)  to indicate
    specific CMS elements, MMS looks for the files in the CMS library
    regardless of whether /NOCMS is in effect.

    If you specify /NOCMS, or the combination /CMS/NORULES, and
    the sources do not exist in the specified directory, MMS aborts
    execution.