At 06:39 PM 10/31/2008, =?ISO-8859-2?Q?Imre_Andr=E1s?= wrote: >Now how can I explicitly tell that SEQUENCE is a keyword, and not a valid ID? tokens { SQ; } ID: { 'SEQUENCE' }=> 'SEQUENCE' {$type = SQ} | ('a'..'z'|'A'..'Z')+ ; >Thanks, > András