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[protege-discussion] Protege 3.4 OWL to RDF error

Tania Tudorache tudorache at
Fri May 8 16:32:04 PDT 2009

I'm not sure why you get the exception.

You should try either: File -> Export -> OWL  (with native and without 
native writer).

Or, you can choose, File -> Convert Project to Format -> RDF Files 

(not OWL/RDF File). This will generate two files: rdf and rdfs. If you 
only want one file, you can copy the content of one into the other.


Manolis Platakis wrote:
> Hello,
> I try to export an ontology to RDF in Protege 3.4 (Vista, JRE 6). I
> choose convert project to format and I pick RDF. In the next window I
> check the box "plain RDFS (may loose Protege-specific facets)" and click
> OK. I end up with the following error:
> Fatal error: java.lang.ClassCastException:
> edu.stanford.smi.protegex.owl.model.impl.DefaultRDFSLiteral cannot be
> cast to java.lang.String.
> Is there any way that I could work around it? Thank you very much in
> advance.
> Best regards,
> Manolis

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