- From: Dan Connolly <connolly@w3.org>
- Date: Wed, 13 Aug 2008 15:39:21 -0500
- To: Jonathan Rees <jar@creativecommons.org>
- Cc: "www-tag@w3.org WG" <www-tag@w3.org>
On Wed, 2008-08-13 at 14:16 -0400, Jonathan Rees wrote:
> If I say, in SPARQL:
>
> select * from <http://example.com/graph1> { ... }
>
> then by my reading of the SPARQL rec (http://www.w3.org/TR/rdf-sparql-query/
> ), http://example.com/graph1 is supposed to name a (named) graph. But
> some SPARQL servers take the URI in a FROM or GRAPH clause and use it
> with HTTP to fetch an RDF/XML or Turtle document, from which triples
> are obtained. By the httpRange-14 resolution, the 200 response means
> that the URI names an information resource.
yes...
> Therefore, at least some RDF graphs (or named graphs) are information
> resources, right?
Strictly speaking, not quite; the SPARQL
spec includes this clarification:
"The FROM NAMED syntax suggests that the IRI identifies the
corresponding graph, but the relationship between an IRI and a graph in
an RDF dataset is indirect. The IRI identifies a resource, and the
resource is represented by a graph (or, more precisely: by a document
that serializes a graph). For further details see [WEBARCH]."
>
> I'm sure this has been discussed before...
>
> Jonathan
>
--
Dan Connolly, W3C http://www.w3.org/People/Connolly/
gpg D3C2 887B 0F92 6005 C541 0875 0F91 96DE 6E52 C29E
Received on Wednesday, 13 August 2008 20:48:34 UTC