XML Source

<source>
     <AAA>box</AAA>
     <BBB>rhomb</BBB>
     <CCC>ellipse</CCC>
     <DDD>triangle</DDD>
</source>

Graphotron Source

<graphotron xmlns:vcg="http://zvon.org/graphotron/vcg" xmlns="http://zvon.org/graphotron" >
     <vertex match="/*/AAA">
          <name select="."/>
          <vcg:shape>box</vcg:shape>
     </vertex>
     <vertex match="/*/BBB">
          <name select="."/>
          <vcg:shape>rhomb</vcg:shape>
     </vertex>
     <vertex match="/*/CCC">
          <name select="."/>
          <vcg:shape>ellipse</vcg:shape>
     </vertex>
     <vertex match="/*/DDD">
          <name select="."/>
          <vcg:shape>triangle</vcg:shape>
     </vertex>
</graphotron>