-<!ELEMENT AS ((AS|host|gateway|router|link|route)*)>
-<!ATTLIST AS id CDATA #REQUIRED>
-<!ATTLIST AS routing CDATA #REQUIRED>
-
-<!ELEMENT gateway EMPTY>
-<!ATTLIST gateway id CDATA #REQUIRED>
-
-<!--
-
-<!ELEMENT AS ((AS|hostDef|routerDef|ASroute)*)>
-<!ATTLIST AS id CDATA #REQUIRED>
-
-<!ELEMENT hostDef (hostAdd*)>
-
-<!ELEMENT hostAdd EMPTY>
-<!ATTLIST hostAdd id CDATA #REQUIRED>
-
-<!ELEMENT routerDef (routerAdd*)>
-
-<!ELEMENT routerAdd EMPTY>
-<!ATTLIST routerAdd id CDATA #REQUIRED>
-
-<!ELEMENT ASroute (ASlink*)>
-<!ATTLIST ASroute src CDATA #REQUIRED>
-<!ATTLIST ASroute dst CDATA #REQUIRED>
-<!ATTLIST ASroute symmetric (YES|NO) "YES">
-
-<!ELEMENT ASlink EMPTY>
-<!ATTLIST ASlink id CDATA #REQUIRED>
-
--->
-<!-- end added by DAVID -->
+<!ELEMENT prop EMPTY>
+<!ATTLIST prop id CDATA #REQUIRED> <!-- <!ATTLIST prop key CDATA #REQUIRED> -->
+<!ATTLIST prop value CDATA #REQUIRED>