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RE: [SWC] RIF & OWL compatibility

From: Gerd Wagner <wagnerg@tu-cottbus.de>
Date: Mon, 16 Jan 2006 01:03:11 +0100
To: "'Enrico Franconi'" <franconi@inf.unibz.it>, "'Michael Kifer'" <kifer@cs.sunysb.edu>
Cc: "'Jos de Bruijn'" <jos.debruijn@deri.org>, <public-rif-wg@w3.org>
Message-ID: <001601c61a30$4402e2b0$17d52b8d@TMGWAGNER>

> > Does anybody have *real-world* RDF experience with cases where truly
> > existential semantics of b-nodes is used?
> You don't need to go very far.
> It is needed in order to capture pure basic SPARQL with RDF 
> entailment.
> Note that the triple
>      "25"^^xsd:decimal rdf:type rdf:XMLLiteral .
> is not legal RDF, since literals can not appear in subject position.  

("25" is a data literal, but is it an XML literal?)

Not allowing to express classification statements for
data literals (but instead imposing the corresponding 
statement for a blank node) is clearly an anomaly of 
the current RDF semantics and can't hardly be the basis 
for any requirement on RIF.

Isn't there a plan already to remove this anomaly of RDF 1.0?


Gerd Wagner 
Brandenburg University of Technology 
at Cottbus, Germany
Received on Monday, 16 January 2006 00:06:06 UTC

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