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

       /DOMAIN=query-name

    Specifies the name of the query to use as the domain for the
    report. The query should include occurrences of files that have
    been compiled. This value is converted to a VAXTPU value and
    assigned to the global VAXTPU variable SCA$REPORT_DOMAIN_QUERY.
    This procedure limits the report to objects that are contained,
    directly or indirectly, within at least one of the files in this
    query.

    The default value is the null string. By convention, VAXTPU report
    procedures interpret this as the entire SCA library.