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Re: Graph labels vs. graph names. (was: Re: complete graphs)

From: Richard Cyganiak <richard@cyganiak.de>
Date: Wed, 5 Oct 2011 17:43:58 +0100
Cc: RDF Working Group WG <public-rdf-wg@w3.org>
Message-Id: <1390C9A8-0CDD-4EFD-9AC1-F7C921F0E1B5@cyganiak.de>
To: Sandro Hawke <sandro@w3.org>
On 5 Oct 2011, at 14:21, Sandro Hawke wrote:
> What sort of private conventions have you seen?    I've heard people
> talk about:
> 
>  1. graph tag is the URL they once fetched the graph from
>  2. graph tag is the URL on which they publish the graph
>  3. graph tag is some sort of non-dereferenceable genid
>  4. graph tag is primary subject URI of the graph (eg the person, for
> FOAF)

5. graph name is the domain name, e.g., http://dbpedia.org

DBpedia uses this convention. Others have started to copy it.

6. graph name is the IRI of a void:Dataset with metadata about the graph contents

We use this in a few places.

7. everything is in the default graph

> It seems to me the variation here is an impediment to interoperability.
> If my code talks to a new sparql server, and doesn't know which of these
> conventions is being used, how can it do its job?  

It might ask the store for graphs that fulfil certain criteria.

Or there might be a SPARQL Service Description document that explains what's in the graphs.

Best,
Richard
Received on Wednesday, 5 October 2011 16:44:39 GMT

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