+<!ELEMENT cluster EMPTY>
+<!ATTLIST cluster id CDATA #REQUIRED>
+<!ATTLIST cluster prefix CDATA #REQUIRED>
+<!ATTLIST cluster suffix CDATA #REQUIRED>
+<!ATTLIST cluster radical CDATA #REQUIRED>
+<!ATTLIST cluster power CDATA #REQUIRED>
+<!ATTLIST cluster bw CDATA #REQUIRED>
+<!ATTLIST cluster lat CDATA #REQUIRED>
+<!ATTLIST cluster sharing_policy (SHARED|FULLDUPLEX|FATPIPE) "SHARED">
+<!ATTLIST cluster bb_bw CDATA #REQUIRED>
+<!ATTLIST cluster bb_lat CDATA #REQUIRED>
+<!ATTLIST cluster bb_sharing_policy (SHARED|FATPIPE) "SHARED">
+