VMS Help RUNOFF, file, Qualifiers, /VARIANT  *Conan The Librarian (sorry for the slow response - running on an old VAX)

       /VARIANT="string[,...]"

    Positional qualifier.

    Controls the processing of the conditional commands (.IF, .IFNOT,
    .ELSE, and .ENDIF) by specifying the names of the segments to be
    processed. For descriptions of the conditional commands, enter
    HELP DSR at the DCL prompt.

    You must name conditional structures introduced by the .IF
    command to process them. You must name conditional structures
    introduced by the .IFNOT command to exclude them. You must not
    name conditional structures introduced by the .ELSE command to
    process them. If you specify only one name in a string, you can
    omit the quotation marks (" ").