Format

1  START  ?  KEY? IS
2.1  EQUAL? TO
2.1  = 
2.1  GREATER? THAN
2.1   > 
2.1  NOT LESS? THAN
2.1  NOT < 
2.1  GREATER? THAN OR EQUAL? TO
2.1  >= 
1 ?  INVALID? KEY ?  NOT INVALID? KEY  ? END-START