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Re: RDFS compatibility information in OWL-DL documents

From: Bijan Parsia <bparsia@cs.man.ac.uk>
Date: Tue, 17 Apr 2007 18:59:02 +0100
Message-Id: <FA317A58-0EB3-41CD-8DA4-746E06CD0470@cs.man.ac.uk>
Cc: Alan Ruttenberg <alanruttenberg@gmail.com>, public-owl-dev@w3.org
To: Jeremy Carroll <jjc@hpl.hp.com>

On Apr 17, 2007, at 5:30 PM, Jeremy Carroll wrote:
> An issue is the annotations on axioms, using reification in the  
> current OWL 1.1 specs. I appreciate that this is semantically  
> correct - the annotation is about the axiom, and not about some  
> participant in the axiom;

To be extra clear, it's not so much an issue of semantic correctness,  
just that it is very difficult to annotate a statement or set of  
statements in RDF. Reification, named graphs (which are an  
extension), "contexts", literals with RDF content, and magic URIs  
(i.e., uris that somehow encode the statement) seem to be the  
choices. I have a lonely preference for literals, but the toolkits  
have problems with them (and there are namespace issues I think  
you've mentioned...you could use an alternative syntax but then the  
toolkits just die faster :)).

Of course, none of this is particularly difficult in the functional  
or xml syntax. So, another choice is to throw them out when you  
compile an RDF version (say for publication).

Received on Tuesday, 17 April 2007 17:59:07 UTC

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