anchor.diff:      ;   
       
   load 	  
  -    : LOAD SILENT? iriRef (INTO graphRef)?
  +    : LOAD SILENT? iri (INTO graphRef)?
       ;
       
   clear
  
positive.code:     ;
  
  pathMod
      : (ASTERISK | QUESTION_MARK | PLUS | OPEN_CURLY_BRACE (integer (COMMA (CLOSE_CURLY_BRACE | integer CLOSE_CURLY_BRACE) | CLOSE_CURLY_BRACE) | COMMA integer CLOSE_CURLY_BRACE))
      ;
  
  pathPrimary
      : iriRef | A | NEGATION pathNegatedPropertySet | OPEN_BRACE path CLOSE_BRACE
      ;
  
  pathNegatedPropertySet
  
negative.code:     ;
  
  usingClause
      : USING NAMED? iri
      ;
  
  graphOrDefault	  
      : DEFAULT | GRAPH? iri
      ;
      	    	
  graphRef
      : GRAPH iri
      ;
  
  graphRefAll
  