DEFINE VERB SIXEL
        IMAGE "SYS$SYSROOT:[SYSEXE]SIXEL"
        PARAMETER P1
                LABEL = REGIS_FILE
                VALUE (TYPE = $FILE, REQUIRED)
                PROMPT = "ReGIS Input File"
        PARAMETER P2
                LABEL = SIXEL_FILE
                VALUE (DEFAULT = "SIXEL.SLS")
        QUALIFIER LOCAL
                NONNEGATABLE
                PLACEMENT = GLOBAL
        QUALIFIER RESET
                NONNEGATABLE
                PLACEMENT = GLOBAL
        QUALIFIER GRAPH_TYPE
                VALUE (TYPE=GRAPH_KEYWORDS)
                NONNEGATABLE
                PLACEMENT = GLOBAL
        DISALLOW SIXEL_FILE AND LOCAL
        DEFINE TYPE GRAPH_KEYWORDS
                KEYWORD COMPRESSED
                KEYWORD EXPANDED
                KEYWORD ROTATED