XML Source

<aaa>
     <bbb/>
     <ccc>
          <ddd/>
          <eee/>
     </ccc>
     <xxx>
          <yyy>
               <zzz/>
               <zzz/>
               <zzz/>
          </yyy>
     </xxx>
</aaa>

Graphotron Source

<graphotron xmlns="http://zvon.org/graphotron" >
     <vertex match="//*">
          <name select="name()"/>
     </vertex>
     <edge match="//*" select="*"/>
</graphotron>