diff --git a/src/main/java/PDLayer.mdl b/src/main/java/PDLayer.mdl
index 0b4cbe0..72996b1 100644
--- a/src/main/java/PDLayer.mdl
+++ b/src/main/java/PDLayer.mdl
@@ -869,6 +869,8 @@ type PDStructElem extends PDStructTreeNode {
 	property parentStandardType: String;
 	% structure type
 	link S: CosUnicodeName;
+	% the namespace and the tag within a given namespace separated by colon
+    property namespaceAndTag: String;
 	% structure type
 	property valueS: String;
 	% standard structure type defined via role map