/EXTRACT (Alpha/Integrity servers only)

    Obtains the authorization data for the display device and writes
    that data to SYS$OUTPUT. The authorization data is obtained from
    the current X authority file and is in the format expected by the
    X Authority utility (xauth).

    Note that when using an LBX proxy server, the extracted
    authorization information references the address of the proxy
    server and not the X display server.

    Do not use the /EXTRACT qualifier with any other SHOW DISPLAY
    qualifier.

    See the description of the SET DISPLAY command for more
    information.