Reduce duplicate namespaces

Author: tvdijen

src/XML/CanonicalizableElementTrait.php

@@ -141,14 +141,13 @@ public function processTransforms(
                         $xpathValue = $xpath->getContent()->getValue();
                         $arXPath['query'] = '(.//. | .//@* | .//namespace::*)[' . $xpathValue . ']';
 
-//                        $arXpath['namespaces'] = $xpath->getNamespaces();
-                        // TODO: review if $nsnode->localName is equivalent to the keys in getNamespaces()
-//                        $nslist = $xp->query('./namespace::*', $node);
-//                        foreach ($nslist as $nsnode) {
-//                            if ($nsnode->localName != "xml") {
-//                                $arXPath['namespaces'][$nsnode->localName] = $nsnode->nodeValue;
-//                            }
-//                        }
+                        $arXpath['namespaces'] = $xpath->getNamespaces();
+                        $nslist = $xp->query('./namespace::*', $node);
+                        foreach ($nslist as $nsnode) {
+                            if ($nsnode->localName != "xml") {
+                                $arXPath['namespaces'][$nsnode->localName] = $nsnode->nodeValue;
+                            }
+                        }
                     }
                     break;
             }