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Re: RDF-ISSUE-17 (graph merge): How are RDF datasets to be merged? [RDF Graphs]

From: Andy Seaborne <andy.seaborne@epimorphics.com>
Date: Mon, 28 Mar 2011 20:38:05 +0100
Message-ID: <4D90E39D.2090201@epimorphics.com>
To: RDF Working Group WG <public-rdf-wg@w3.org>
Wouldn't it be better to put the RDF datasets merge definition along 
side the RDF dataset definition to put everything in one place? 
Splitting across docs isn't great.


and s/union/merge/g ; s/graph store/RDf dataset/g ;


On 28/03/11 16:07, RDF Working Group Issue Tracker wrote:
> RDF-ISSUE-17 (graph merge): How are RDF datasets to be merged? [RDF Graphs]
> http://www.w3.org/2011/rdf-wg/track/issues/17
> Raised by: David Wood
> On product: RDF Graphs
> The "RDF Semantics" spec defines how to merge two or more RDF graphs,
> the pain is caused by blank nodes, otherwise it's a trivial operation.
> The "SPARQL Query Language for RDF" spec defines the notion of RDF
> dataset as a set of "one graph, the default graph, which does not have
> a name, and zero or more named graphs, where each named graph is
> identified by an IRI".
> How do we define how to merge RDF datasets?
> One obvious answer is we merge all the default graphs and all the
> named graphs with the same IRI using the procedure defined by the "RDF
> Semantics" to merge RDF graphs.
> NB: This issue will also relate to the "Cleanup Tasks" product if the RDF Semantics document will need to change in relation to named graphs.
> At Talis, within the Talis Platform, we want to enable people to
> easily merge RDF graphs into an RDF dataset and perhaps RDF datasets
> into another RDF dataset. We also want to have these merge happen in
> real-time (i.e. as you add/remove triples from the graphs you update
> all the derived graphs/datasets).
> Thanks to Paolo Castagna of Talis for providing input to this issue.
Received on Monday, 28 March 2011 19:38:44 UTC

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