727     public function validateDigest($refNode, $data) {  argument
728         $xpath = new DOMXPath($refNode->ownerDocument);
731         $digestAlgorithm = $xpath->evaluate($query, $refNode);
734         $digestValue = $xpath->evaluate($query, $refNode);
738     public function processTransforms($refNode, $objData, $includeCommentNodes = true) {  argument
740         $xpath = new DOMXPath($refNode->ownerDocument);
743         $nodelist = $xpath->query($query, $refNode);
821     public function processRefNode($refNode) {  argument
830         if ($uri = $refNode->getAttribute("URI")) {
840                     $xPath = new DOMXPath($refNode->ownerDocument);
855                     $dataObject = $refNode->ownerDocument;
864             $dataObject = $refNode->ownerDocument;
866         $data = $this->processTransforms($refNode, $dataObject, $includeCommentNodes);
867         if (!$this->validateDigest($refNode, $data)) {
883     public function getRefNodeID($refNode) {  argument
884         if ($uri = $refNode->getAttribute("URI")) {
904         foreach ($nodeset AS $refNode) {
905             $refids[] = $this->getRefNodeID($refNode);
925         foreach ($nodeset AS $refNode) {
926             if (! $this->processRefNode($refNode)) {
955         $refNode = $this->createNewSignNode('Reference');
956         $sinfoNode->appendChild($refNode);
967             $refNode->setAttribute("URI", '#'.$uri);
969             $refNode->setAttribute("URI", '');
973         $refNode->appendChild($transNodes);
1000         $canonicalData = $this->processTransforms($refNode, $node);
1004         $refNode->appendChild($digestMethod);
1008         $refNode->appendChild($digestValue);