Hi, If you are interested in content syndication (ala RSS) with Topic Maps ....I have updated the ontology http://astma.it.bond.edu.au/ontologies/tmss.ont It describes what a 'channel', 'channel-item', .... is supposed to mean and serves as another use case for AsTMa! This is prototyped in Perl http://search.cpan.org/author/DRRHO/Syndicate-Channel-0.10/ \rho