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RE: meta-information about assertions

From: Michael Schneider <schneid@fzi.de>
Date: Tue, 4 Mar 2008 20:00:33 +0100
Message-ID: <0EF30CAA69519C4CB91D01481AEA06A075163C@judith.fzi.de>
To: "Chris Bizer" <chris@bizer.de>
Cc: <semantic-web@w3.org>
Hi, Chris!

Chris Bizer wrote on Tuesday, March 04: 

>I think the only people still thinking about using 
>reification are the new OWL working group and I hope that they 
>will also realize at some point that they are running 
>into problems with this.

There are currently two language features in OWL-1.1 where RDF reification is used in the RDF syntax:

  * axiom annotations (comments on ontology axioms)

  * negative property assertions (negated statements, i.e. "NOT(s p o)")

And two issues have been raised, one for each of these language features:

  * ISSUE-67: use of reification in mapping rules is unwise (axiom annotation)
    <http://www.w3.org/2007/OWL/tracker/issues/67>

  * ISSUE-81: reification unwise in negative property assertions
    <http://www.w3.org/2007/OWL/tracker/issues/81>

So the OWL-WG *will* address all the OWL-1.1 related problems resulting from RDF Reification.

Cheers,
Michael

--
Dipl.-Inform. Michael Schneider
FZI Forschungszentrum Informatik Karlsruhe
Abtl. Information Process Engineering (IPE)
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Received on Tuesday, 4 March 2008 19:00:46 UTC

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