Re: newbie question about sparql and 200

On Thu, 2008-08-14 at 00:27 -0400, Alan Ruttenberg wrote:
> On Aug 14, 2008, at 12:11 AM, Dan Connolly wrote:
> 
> > On Wed, 2008-08-13 at 19:17 -0400, Alan Ruttenberg wrote:
> >> Does this mean that the IRI following the GRAPH keyword also  
> >> denotes a
> >> document? Or that the same iri can denotes both a graph and its
> >> serialization?
> >
> > No. It just means what it says.
> 
> If I understood what it says, I wouldn't have asked for  
> clarification. Care to be a little more educational? Does  
> "represents" mean awww:represents, the relation between what comes  
> back over the wire when you do an http GET on a URI and what the URI  
> denotes?

Yes, I read it that way.


> -Alan
> 
> 
> >
> >> -Alan
> >>
> >> On Aug 13, 2008, at 4:39 PM, Dan Connolly <connolly@w3.org> wrote:
> >>
> >>>
> >>> 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
> >
> >
-- 
Dan Connolly, W3C http://www.w3.org/People/Connolly/
gpg D3C2 887B 0F92 6005 C541  0875 0F91 96DE 6E52 C29E

Received on Thursday, 14 August 2008 13:24:33 UTC