XML Source

<source>
     <AAA>fontsize: default</AAA>
     <BBB>fontsize: 10</BBB>
     <CCC>fontsize: 20</CCC>
     <DDD>fontsize: 30</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:fontsize>10</dot:fontsize>
     </vertex>
     <vertex match="/*/CCC">
          <name select="."/>
          <dot:fontsize>20</dot:fontsize>
     </vertex>
     <vertex match="/*/DDD">
          <dot:fontsize>30</dot:fontsize>
          <name select="."/>
     </vertex>
</graphotron>