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

       /PROTECTION=(ownership[:access][,...])

    Specifies protection for the output file.

    o  Specify the ownership parameter as system (S),  owner (O),
       group (G),  or world (W).

    o  Specify the access parameter as read (R),  write (W), execute
       (E),  or delete (D).

    The default protection, including any protection attributes not
    specified, is that of the existing output file. If no output file
    exists, the current default protection applies. This qualifier is
    relevant only with the /NEW_VERSION qualifier.

    For more information on specifying protection codes, refer to the
    OpenVMS Guide to System Security.