Updated attack pattern DTD (Issue
<!ATTLIST structure attack_obstacle CDATA #IMPLIED>
<!ATTLIST structure exploit_obstacle CDATA #IMPLIED>
-<!ELEMENT participant (motive+,capability+)>
+<!ELEMENT participant (motive*,capability*)>
<!ATTLIST participant name CDATA #REQUIRED>
<!ELEMENT motive EMPTY>
<!ATTLIST motive name CDATA #REQUIRED>
