private QualifiedName getQualqualifiedName(QualifiedName qualifiedName) {
   if (qualifiedName.getNamespaceURI() == "" || qualifiedName.getNamespaceURI().equals(BNODE_NS)) {
     BNode bnode = new BNodeImpl(qualifiedName.getLocalPart());
     if (!isBNodeReferenced(bnode)) {
       return null;
     }
     return pFactory.newQualifiedName(BNODE_NS, qualifiedName.getLocalPart(), "bnode");
   }
   return qualifiedName;
 }