Bookmarks: organizing bookmark items with RDF collections

• Each topic is associated with an RDF collection

 <rdf:Description rdf:about="file:///home/kahan/.amaya/bookmarks.rdf#Topic1">

  <b:collection rdf:parseType="Collection">     <rdf:Description
         rdf:about="file:///home/kahan/.amaya/bookmarks.rdf#bookmark2" /> 
    <b:Separator /> 
   <rdf:Description
         rdf:about="file:///home/kahan/.amaya/bookmarks.rdf#Topic4" /> 
    <rdf:Description 
         rdf:about="file:///home/kahan/.amaya/bookmarks.rdf#bookmark1" />
  </b:collection>

</rdf:Description>