W3C home > Mailing lists > Public > www-rdf-comments@w3.org > January to March 2002

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: <>
To: GK@Dial.pipex.com
Cc: www-rdf-comments@w3.org


you raised an issue which was captured in



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


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 UTC

This archive was generated by hypermail 2.3.1 : Tuesday, 6 January 2015 21:15:17 UTC