'set novalue on'  /* force KEXX and its way of SIGNAL ON NOVALUE  */

/* Usage:         [MACRO] MUSTARD                                 */
/* Purpose:       MUSTARD tags all (potential) RFC 2119 keywords  */
/* Caveats:       There is no STRONGLY in RFC 2119.  The keywords */
/*                MUST, SHALL, and SHOULD can be combined with a  */
/*                NOT.  The combination NOT RECOMMENDED ia also   */
/*                "allowed", but NOT REQUIRED, NOT OPTIONAL, and  */
/*                MAY NOT would be dubious.                       */
/* Requires:      Kedit 5.0               (Frank Ellermann, 2006) */

   MUSTARD = '/MUST/ | /SHALL/ | /SHOULD/ | /RECOMMENDED/'
   MUSTARD = MUSTARD '| /MAY/ | /OPTIONAL/ | /REQUIRED/ | /NOT /'

   'extract /CASE'               ;  'case M R'
   'tag'                         ;  'tag' MUSTARD
   RX = rc                       ;  'case' CASE.1 CASE.2
   if RX = 0 then 'all tagged'   ;  exit RX