/UID=n
    Optional. Default: Determined with CREATE DIRECTORY.
    Selects a specific entry in the proxy database to determine the
    ownership of the UNIX file.
    In the proxy database:
    o  UID and GID fields identify UNIX ownership.
    o  User name field identifies OpenVMS ownership.
    If you want to access an entry in the proxy database without a
    unique UID and user name combination, you might need to specify
    the /HOST qualifier. For example, the same UID and user name
    combination could appear on multiple hosts.
    You can use the /UID qualifier in any combination with the /HOST
    and /USER_NAME qualifiers. However, if you do not have SYSPRV or
    BYPASS privilege, the values you specify must correspond to the
    values for your user name in the proxy database.