phax commented on code in PR #234:
URL: 
https://github.com/apache/santuario-xml-security-java/pull/234#discussion_r1383699188


##########
src/main/java/org/apache/xml/security/utils/XMLUtils.java:
##########
@@ -706,6 +706,27 @@ public static Element selectXencNode(Node sibling, String 
nodeName, int number)
         return null;
     }
 
+    /**
+     *
+     * @param sibling
+     * @param nodeName
+     * @param number
+     * @return nodes with the given node name
+     */
+    public static Element selectXenc11Node(Node sibling, String nodeName, int 
number) {
+        while (sibling != null) {
+            if 
(EncryptionConstants.EncryptionSpec11NS.equals(sibling.getNamespaceURI())
+                    && sibling.getLocalName().equals(nodeName)) {
+                if (number == 0){
+                    return (Element)sibling;

Review Comment:
   Is it always safe to assume that this is an `Element`? `Text` nodes also 
implement `getNextSibling()` (for multiple `CDATA` I assume) - but they can 
never have a namespace URI... Just doesn't feel too perfect. Maybe some comment 
may help :)



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