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RDF Issue rdfms-identity-of-statements

From: Brian McBride <bwm@hplb.hpl.hp.com>
Date: Mon, 11 Mar 2002 14:50:53 +0000
Message-Id: <5.1.0.14.0.20020311144816.030a25d8@0-mail-1.hpl.hp.com>
To: GK@Dial.pipex.com
Cc: www-rdf-comments@w3.org
,
In

   http://lists.w3.org/Archives/Public/www-rdf-interest/2000Sep/0032.html

you raised an issue which was captured in

   http://www.w3.org/2000/03/rdf-tracking/#rdfms-identity-of-statements

as

[[[
There is a question whether or not there can be two different statements 
with the same subject, object and property. Most people seem to say "no". I 
have suggested that this should be allowed because it can be expressed in 
reified RDF statements and that there should be a 1:1 correspondence 
between what can be expressed in an RDF model and its reification.
]]]

As recorded in

   http://lists.w3.org/Archives/Public/w3c-rdfcore-wg/2002Feb/0476.html

the RDFCore WG has resolved:

    <stmt1> <rdf:type> <rdf:Statement> .
    <stmt1> <rdf:subject> <subject> .
    <stmt1> <rdf:predicate> <predicate> .
    <stmt1> <rdf:object> <object> .

    <stmt2> <rdf:type> <rdf:Statement> .
    <stmt2> <rdf:subject> <subject> .
    <stmt2> <rdf:predicate> <predicate> .
    <stmt2> <rdf:object> <object> .

    <stmt1> <property> <foo> .

    does not entail:

    <stmt2> <property> <foo> .

This is a formal way of saying that two reified statements with the same 
subject, predicate and object can be different resources.

Please could you respond to this message, copying www-rdf-comments@w3.org 
indicating whether this is an acceptable resolution of this issue.

Brian McBride
RDFCore co-chair
Received on Monday, 11 March 2002 09:54:54 GMT

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