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[protege-owl] DataMaster: OWL models generated from Relational schemas

Csongor Nyulas csongor.nyulas at stanford.edu
Mon Feb 9 17:16:58 PST 2009


Hi Kat,

Are you importing the data in an empty ontology? If not, could you try 
to import the tables in an empty ontology, and let us know if you still 
got the problem?

Thanks,
Csongor

Pav | Kat Kataria wrote:
> Dear All,
>  
> I've generated some OWL models from relational schemas using the 
> Datamaster plug-in.* I have not created* any OWL restrictions, rules 
> or constraints to the generated OWL model but when I click 'classify 
> taxonomy' using the reasoning option (using Pellet as a default 
> reasoning engine) I obtain the attached error log.
>  
> Now to confirm my understanding would someone be able to tell me why I 
> have these errors - surely if there are no OWL restrictions, rules or 
> constraints set then NO errors should appear, i.e. no inferred 
> knowledge is to be generated?
>  
> Alternatively, is this because Protege 3.4 does not support a 
> reasoning engine such as Protege 4? (I am yet to try this in Protege 4)
>  
> Or have I simply not understood the purpose of reasoning in OWL?
>  
>  
> If anyone can advise further - I would really appreciate it - I'm 
> trying to understand how OWL deals with reasoning (at a variety of 
> levels) and desperately need it for my thesis!
>  
> Thanking you in advance,
>  
> Kat.
>  
>  
>  
>
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