XML Source

<source>
     <AAA>width: default</AAA>
     <BBB>width: 0.001</BBB>
     <CCC>width: 1</CCC>
     <DDD>width: 3</DDD>
</source>

Graphotron Source

<graphotron xmlns="http://zvon.org/graphotron" xmlns:dot="http://zvon.org/graphotron/dot" >
     <vertex match="/*/AAA">
          <name select="."/>
     </vertex>
     <vertex match="/*/BBB">
          <name select="."/>
          <dot:width>0.001</dot:width>
     </vertex>
     <vertex match="/*/CCC">
          <name select="."/>
          <dot:width>1</dot:width>
     </vertex>
     <vertex match="/*/DDD">
          <dot:width>3</dot:width>
          <name select="."/>
     </vertex>
</graphotron>