I just finished the first complete draft of an OWL ontology of the DAIA data model. Unless the final URI prefix is sure, the ontology is available in GBV Wiki in Notation3 syntax, but you can also get RDF/XML. There is also a browsable HTML view created with OWLDoc (I only wonder why it does not include URI prefixes like in the same view of the Bibliographic Ontology).
It turned out that mapping the XML format DAIA/XML to RDF is not trivial – although I kept in mind doing so when I designed DAIA. XML is mostly based on a closed world tree data model but RDF is based on an open world graph model. Last month Mike Bergman wrote a good article about the clash of Open World Assumption and Closed World Assumption. I think as long as you only view data in form of tables, lists, and trees, you will not grasp the concept of the Semantic Web. I don’t know whether I have fully grasped the concept of document availability with DAIA and the ontology surely needs some further review, but it’s something to start with – just have a look!
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