anchor.diff:      ;
   
   commandname
  -    : (BREAK | CLOSE | DO | ELSE | GOTO | HALT | HANG | IF | JOB
  -      | KILL | LOCK | MERGE | NEW | OPEN | READ | TCOMMIT
  -      | TRESTART | TROLLBACK | TSTART | USE | VIEW| XECUTE)
  -      | set 
  +    : (CLOSE | DO | ELSE | GOTO | HANG | IF | JOB
  +      | KILL | LOCK | MERGE | OPEN | READ | TCOMMIT
  +      | TRESTART | TROLLBACK | TSTART | USE | VIEW | XECUTE)
  +      | set
         | form
         | write
         | quit
  +      | halt
  +      | neww
  +      | breakk
       ;
   
   arglist
  
positive.code:     : G O T O
      ;
  
  HALT
      : H A L T
      ;
  
  HANG
  
negative.code:     : M E R G E
      ;
  
  NEW1
      : N E W
      ;
  
  NEW2
      : N
      ;
  
  OPEN
  