Re: Importing SKOS model in ontology editors : clash with annotation properties

Hi Bernard,

I have also stumbled upon this and can provide some comments with  
regards to Protege 4

>
> Protégé 4.0 decides that "pure" annotation properties can't be the  
> subject of assertions, so it considers all the annotation properties  
> participating in the subproperty statements are object properties  
> (but still annotation properties), which seems weird to me. There  
> again, if the model is saved, properties are saved this way.
>

P4 is an OWL 2 editor so using sub property axioms between annotations  
is unlikely to be supported.  The current behaviour  is down to P4  
guessing what you might have meant in your file. Work is being done to  
improve support for SKOS in P4 (SKOSEd plugin), I  have thought about  
writing some kind of validator that gives some warning/repair  
mechanism for SKOS constructs that take you into OWL Full.

In addition, OWL 2 has vocabulary for declaring sub annotation  
properties [1]. Given that SKOS labels are now annotation properties I  
expect that extending these properties with sub annotation property  
axioms is valid SKOS (I might be wrong though?). The OWL API is  
currently being updated to support this vocabulary, which should  
eventually make its way into the P4 interface.

Cheers
Simon

1- http://www.w3.org/2007/OWL/wiki/Syntax#Annotation_Subproperties

> Remarkably enough, none of those tools signal any error or trigger  
> any warning when loading the file. Which is unfortunate indeed.
> It's been a daily routine in Mondeca to merge the SKOS model into  
> wider customer ontologies we manage with the above editors.
> And I guess we are not alone in this case.
>
> I have no solid proposal to deal with that issue, but just wondering  
> if others have stumbled on it.
>
> Cheers
>
> Bernard
>
> -- 
>
> *Bernard Vatant
> *Senior Consultant
> Vocabulary & Data Engineering
> Tel:       +33 (0) 971 488 459
> Mail:     bernard.vatant@mondeca.com <mailto:bernard.vatant@mondeca.com 
> >
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>



Simon Jupp
simon.jupp@manchester.ac.uk
http://www.cs.man.ac.uk/~sjupp/