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Re: reification test case

From: Dan Brickley <danbri@w3.org>
Date: Sun, 3 Feb 2002 22:21:24 -0500
To: Frank Manola <fmanola@mitre.org>
Cc: Brian McBride <bwm@hplb.hpl.hp.com>, RDF Core <w3c-rdfcore-wg@w3.org>
Message-ID: <20020203222124.B31282@tux.w3.org>
* Frank Manola <fmanola@mitre.org> [2002-02-03 16:05-0500]
> Sorry, I need a "real" (not abstract) example.

This is a formalisation of the old 'stating vs statement' characterisation of
the confusion surrounding M+S's notion of an rdf:Statement. For a real example, pick 
any interesting triple from some worldy use case. Create two descriptions of a
bnode of rdf:type rdf:Statement using the pre/subj/obj from that tripe, i
and attach differing 'who said this and when they said it' information to each. 
The question is really about whether the class rdf:Statement has members 
that are uniquely picked out by their pred/subj/obj characteristics, or whether that
class can have two members with the self-same pred/subj/object values.

To avoid mixing this up with the literal datatyping issue, it is probably best to 
use examples where the object of the statement is a URI rather than a literal.

Dan

> 
> --Frank
> 
> Brian McBride wrote:
> 
> > We have to decide on Dan Brickley's equality test.  Does
> > 
> > _:s1 <rdf:type>      <rdf:Statement> .
> > _:s1 <rdf:subject>   <subject> .
> > _:s1 <rdf:predicate> <predicate> .
> > _:s1 <rdf:object>    <object> .
> > 
> > _:s2 <rdf:type>      <rdf:Statement> .
> > _:s2 <rdf:subject>   <subject> .
> > _:s2 <rdf:predicate> <predicate> .
> > _:s2 <rdf:object>    <object> .
> > 
> > _:s1 <property>      "property" .
> > 
> > entail:
> > 
> > _:s2 <property>      "property" .
> > 
> > Brian
> > 
> 
> 
> -- 
> Frank Manola                   The MITRE Corporation
> 202 Burlington Road, MS A345   Bedford, MA 01730-1420
> mailto:fmanola@mitre.org       voice: 781-271-8147   FAX: 781-271-875
> 
Received on Sunday, 3 February 2002 22:24:26 EST

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