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Re: Semantics of rdfs:seeAlso (Was: Is it best practices to use a rdfs:seeAlso link to a potentially multimegabyte PDF?)

From: Kingsley Idehen <kidehen@openlinksw.com>
Date: Mon, 17 Jan 2011 17:47:33 -0500
Message-ID: <4D34C705.5040001@openlinksw.com>
To: Martin Hepp <martin.hepp@ebusiness-unibw.org>
CC: Tim Berners-Lee <timbl@w3.org>, "<john.nj.davies@bt.com>" <john.nj.davies@bt.com>, david@dbooth.org, public-lod@w3.org
On 1/17/11 5:32 PM, Martin Hepp wrote:
> Hi,
>
> First: Thanks for the kind clarification!
>
>>> In parallel, we can discourage people to use rdfs:seeAlso to point 
>>> to non-RDF resources in the future. It can easily be substituted by 
>>> foaf:depiction for images and foaf:page for HTML resources without 
>>> RDFa.
>>
>> Yes, exactly.
>
>
> FYI: The W3C HTTP headers "ontology" at
>
>    http://www.w3.org/2008/http-headers
>
> uses rdfs:isDefinedBy to point to non-RDF resources, e.g. RFCs in 
> plain text:
>
> <rdf:Description rdf:about="#content-encoding">
> <rdfs:isDefinedBy 
> rdf:resource="http://www.rfc-editor.org/rfc/rfc2616.txt"/>
> <dc:description xml:lang="en">The Content-Encoding 
> header</dc:description>
> <dc:title xml:lang="en">Content-Encoding</dc:title>
> <rdf:type rdf:resource="http://www.w3.org/2006/http#HeaderName"/>
> </rdf:Description>
>
> Since rdfs:isDefinedBy is a subproperty of rdfs:seeAlso, this may also 
> clash with existing FOAF client code, unless the lack of inferencing 
> in a given environment isolates the problem.
>
> The same holds also for
>
>    http://www.w3.org/2008/http-methods
>    http://www.w3.org/2008/http-statusCodes
>
> If there is agreement to avoid rdfs:seeAlso for non-RDF resources, we 
> should also avoid rdfs:isDefinedBy.

+1

Kingsley
>
> Best
> Martin
>
>
>
>


-- 

Regards,

Kingsley Idehen	
President&  CEO
OpenLink Software
Web: http://www.openlinksw.com
Weblog: http://www.openlinksw.com/blog/~kidehen
Twitter/Identi.ca: kidehen
Received on Monday, 17 January 2011 22:48:05 UTC

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