sawine@1: is	 { return IS; }
sawine@1: in	 { return IN; }
sawine@1: not	 { return NOT; }
sawine@1: less	 { return LESS; }
sawine@1: greater	 { return GREATER; }
sawine@1: than	 { return THAN; }
sawine@1: and	 { return AND; }
sawine@1: or	 { return OR; }