+<!ELEMENT AS (((AS|link)*,ASroute*)|((host|router|link)*,route*))>
+<!ATTLIST AS id CDATA #REQUIRED>
+<!ATTLIST AS routing CDATA #REQUIRED>
+
+<!--<!ELEMENT route (link:ctn*)>
+<!ATTLIST route src CDATA #REQUIRED>
+<!ATTLIST route dst CDATA #REQUIRED>-->
+
+<!ELEMENT ASroute (link:ctn*)>
+<!ATTLIST ASroute src CDATA #REQUIRED>
+<!ATTLIST ASroute dst CDATA #REQUIRED>
+<!ATTLIST ASroute gw_src CDATA #REQUIRED>
+<!ATTLIST ASroute gw_dst CDATA #REQUIRED>
+
+
+<!--<!ELEMENT AS ((AS|host|gateway|router|link|route)*)>