Nikita Ogievetsky has made available slides from his recent presentation
at the Extreme Markup conference, XML Topic Maps through RDF
Glasses, in which he showed how XTM could be implemented in RDF.
Dan Connolly has invited discussion on www-rdf-interest
about the charter of
the proposed Web Ontology Working Group. The WebOnt group is chartered
to design an onotology language that "builds on current Web languages that
allow the specification of classes and subclasses, properties and
subproperties (such as RDFS), but which extends these constructs to allow
more complex relationships between entities." For more information, see
Connolly's announcement
of the Working Group and the WebOnt WG home page.