<!-- Small DTD for SURF based tools. -->
-<!ELEMENT platform_description ((cpu|network_link|route|process)*)>
+<!ELEMENT platform_description ((include|cpu|network_link|route|process)*)>
+
+<!ELEMENT include ((include|cpu|network_link|route|process)*)>
+<!ATTLIST include file CDATA #REQUIRED>
<!ELEMENT cpu EMPTY>
<!ATTLIST cpu name CDATA #REQUIRED>
<!ELEMENT route (route_element*)>
<!ATTLIST route src CDATA #REQUIRED>
<!ATTLIST route dst CDATA #REQUIRED>
+<!ATTLIST route impact_on_computation CDATA>
<!ELEMENT route_element EMPTY>
<!ATTLIST route_element name CDATA #REQUIRED>