<schemalist>

  <schema id='a'/>

  <schema id='b' extends='a'/>

  <schema id='c' extends='b'/>

  <schema id='la' list-of='a'/>

  <schema id='lb' list-of='b'/>

  <schema id='lc' list-of='c'/>

  <schema id='lb-la' list-of='b' extends='la'/>

  <schema id='lc-la' list-of='c' extends='la'/>

  <schema id='lc-lb' list-of='c' extends='lb'/>

  <schema id='lc-lb-la' list-of='c' extends='lb-la'/>

</schemalist>