W3C home > Mailing lists > Public > public-rdf-wg@w3.org > April 2012

Re: Contradicting definitions of “property”

From: David Wood <david@3roundstones.com>
Date: Fri, 27 Apr 2012 11:24:36 -0400
Cc: RDF Working Group WG <public-rdf-wg@w3.org>, Simon Reinhardt <simon.reinhardt@koeln.de>
Message-Id: <FEDDC145-56A0-4E5D-9A0F-750A1C2D7525@3roundstones.com>
To: Richard Cyganiak <richard@cyganiak.de>
Thanks, Richard.  I think your solution is correct.

Regards,
Dave




On Apr 25, 2012, at 20:00, Richard Cyganiak wrote:

> All,
> 
> Simon Reinhardt spotted [1] a nice little contradiction between the 2004 versions of RDF Concepts and RDF Semantics.
> 
> RDF Concepts states, in a normative section [2]:
> 
> [[
> The predicate is also known as the property of the triple.
> ]]
> 
> Where “predicate” is defined as a URIref, one of the three components of a triple. RDF Semantics, on the other hand, defines [3]:
> 
> [[
> A simple interpretation I of a vocabulary V is defined by … a set IP, called the set of properties of I.
> ]]
> 
> And the rest of the mechanics make it clear that URIrefs can denote a member of IP. In other words, RDF Concepts says that the predicate IRI *is* the property, while RDF Semantics says that it *denotes* the property.
> 
> The analogy with classes shows IMO that RDF Concepts is wrong and RDF Semantics is right. The IRI <http://xmlns.com/foaf/0.1/Person> *is* not a class, but it *denotes* a class.
> 
> I therefore deleted the normative definition quoted above from the RDF Concepts ED. If you disagree with this change or see further need to discuss this, then please respond.
> 
> Note that the new Introduction section in the RDF Concepts ED contains an *informative* sentence that introduces the term “property” [4], and it is in line with RDF Semantics:
> 
> [[
> The predicate itself is an IRI and denotes a binary relation, also known as a property.
> ]]
> 
> Best,
> Richard
> 
> 
> [1] http://lists.w3.org/Archives/Public/public-rdf-comments/2012Mar/0008.html
> [2] http://www.w3.org/TR/2004/REC-rdf-concepts-20040210/#section-triples
> [3] http://www.w3.org/TR/2004/REC-rdf-mt-20040210/#gddenot
> [4] http://dvcs.w3.org/hg/rdf/raw-file/default/rdf-concepts/index.html#dfn-property
Received on Friday, 27 April 2012 15:25:13 UTC

This archive was generated by hypermail 2.3.1 : Tuesday, 6 January 2015 22:02:04 UTC