context           602 dxref.c            xmlXPathContextPtr context;
context           604 dxref.c            context = xmlXPathNewContext(xml_doc);
context           605 dxref.c            assert (context != NULL);
context           606 dxref.c            context->node = from;
context           607 dxref.c            result = xmlXPathEval (xpath, context);
context           608 dxref.c            xmlXPathFreeContext (context);