code: private Element createElement(final Document theTargetDocument, final String theName) {
          final Element indexEntryNode = theTargetDocument.createElementNS(this.namespace_url, theName);
          indexEntryNode.setPrefix(this.prefix);
          return indexEntryNode;
      }
docs: Creates element with "prefix" in "namespace_url" with given name for the target document
  
  @param theTargetDocument target document
  @param theName           name
  @return new element