/ATTRIBUTE=keyword(=value) This qualifier is used in combination
    with 3 possible keywords : BEFORE=date, SINCE=date or NONE. The
    last attribute change date is used in for selecting files. Use
    SINCE and BEFORE or NONE , but not both. The NONE keyword returns
    files which don't have a last attribute change date set. Examples
    :

    o  /ATTRIBUTE=BEFORE=date

    o  /ATTRIBUTE=(BEFORE=date,SINCE=anotherdate)

    o  /ATTRIBUTE=NONE