anchor.diff:      ;
   
   quadsNotTriples
  -    : GRAPH varOrIRIref OPEN_CURLY_BRACE triplesTemplate? CLOSE_CURLY_BRACE
  +    : GRAPH varOrIRI OPEN_CURLY_BRACE triplesTemplate? CLOSE_CURLY_BRACE
       ;
       
   triplesTemplate
  
positive.code:     : var | graphTerm
      ;
  
  varOrIRIref
      : var | iri
      ;
  
  
negative.code:     ;
  
  graphGraphPattern
      : GRAPH varOrIRI groupGraphPattern
      ;
  
  serviceGraphPattern
      : SERVICE SILENT? varOrIRI groupGraphPattern
      ;
      
  bind
  