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Re: Would RDFa support Named Graph ?

From: Ivan Herman <ivan@w3.org>
Date: Fri, 25 Nov 2011 14:24:32 +0100
Cc: public-rdfa-wg@w3.org
Message-Id: <54D9DB97-95D7-4358-8497-7FBEA9B1CD04@w3.org>
To: landong zuo <landong.zuo@googlemail.com>
Dear, Landong,

RDFa does not have any syntax for named graphs at this time. For the time being the issue of named graph (semantics, possible syntaxes, etc) is still being discussed in the RDF WG and it would be premature to add this to RDFa. This is clearly the topic of future discussions for a next release of RDFa once the RDF concepts have been clarified.

Sincerely

Ivan


  
On Nov 24, 2011, at 18:30 , landong zuo wrote:

> Hi,
> 
> I have been looking around for a "recommended" solution to render Named Graph in XHTML+RDFa syntax but with no luck.
> I am not sure if this is the right place to raise this question. Or, if this issue was already concluded previously in RDFa Work Group. I am sorry if it was. 
> 
> My use case originates from the Trust and Provenance of Semantic Data Publishing. In such a case, we need to publish the RDF triples alongside with its metadata, e.g. provenance and digital signature. 
> This can be done in TriG syntax by identifying the named graph and specifying the relationship between graphs. However, if we want to render the triples in XHTML+RDFa page, there is not a straight way to represent the named graphs in RDFa syntax. 
> 
> I've caught up with previous discussion between Mark Birbeck and Michael Hausenblas at the link below.
> http://lists.w3.org/Archives/Public/public-swd-wg/2007Dec/0114.html
> 
> As Mark made his point that RDFa is supposed to carry all triples from single RDF graph and there is not need to put Named Graph in RDFa syntax. I am wondering if this assumption has somehow restricted the expressivity of RDFa, i.e. metadata with strong coherent relationship can not be published within the same page of the document?
> 
> I am looking forward to your comment and suggestion. Further discussion and information is warmly welcomed. 
> 
> Regards,
> 
> 
> 
> 
> Landong Zuo
> 
> Semantic Web Developer
> 
> The Stationery Office
> 
> Tel:  44 (0) 1603 696920
> 
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> 
> Email: landong.zuo@tso.co.uk
> 
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> 


----
Ivan Herman, W3C Semantic Web Activity Lead
Home: http://www.w3.org/People/Ivan/
mobile: +31-641044153
FOAF: http://www.ivan-herman.net/foaf.rdf
Received on Friday, 25 November 2011 13:21:30 GMT

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