anchor.diff:  ;
   
   closeRelativeStatement :
  -	(WITH? (NO REWIND | LOCK))?
  +	WITH? (NO REWIND | LOCK)
   ;
   
   closePortFileIOStatement :
  
positive.code: // goto statement
  
  goToStatement :
  	GO TO?
  	(
  		procedureName+ (DEPENDING ON? identifier)?
  		| MORE_LABELS
  	)
  ;
  
  // if statement
  
negative.code: 
  computeStatement :
  	COMPUTE (identifier ROUNDED?)+
  	(EQUALCHAR | EQUAL) arithmeticExpression
  	(ON SIZE ERROR statements)?
  	(NOT ON? SIZE ERROR statements)?
  	END_COMPUTE?
  ;
  