On 26/07/13 23:21, Jeremy J Carroll wrote:
Ah, and I just came across some other relevant text:
http://www.w3.org/TR/2013/REC-sparql11-query-20130321/#namedGraphs
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).*
Given that the text in bold is already normative, am I detecting some
part of the RDF WG that somehow wishes to go back on that. I do not
believe that my ideal outcome would be no more than the text in bold.
Jeremy J Carroll
Principal Architect
Syapse, Inc.
and indeed it is in SPARQL 1.0, so this has been around awhile.
http://www.w3.org/TR/rdf-sparql-query/#namedGraphs
It is discussing the "FROM NAMED" syntax so one can argue it's
restricted to that. The RDF Dataset definition does not refer or
contain that material. So it's one example, not the only case.
http://www.w3.org/TR/rdf-sparql-query/#defn_RDFDataset
There are several interesting points about Jeremy's use case:
1/ It seems to be a very reasonable thing to want to do.
2/ It's about the acting of asserting/publishing the graph.
(I read it assuming if you GET the URLs, you get the graph back, at
least conceptually - is that true Jeremy?)
3/ There is context
>>> I want to say simple stuff like who wrote a graph named
>>> in the dataset.
talks about the graph in a context (dataset, not web).
But if you add all the modelling for the act of writing a graph named
in the dataset, it gets unwieldy.
I think this is one source of the pushback on pure denotes-graph design
(see also some criticisms of reification).
4/
my:graph {
my:graph dc:creator "Jeremy J. Carroll" .
}
and the definition of dc:creator is given as:
"An entity primarily responsible for making the resource."
so did Jeremy "make" the graph? Or maybe "make" the named graph?
[[
rdf:Graph
rdf:Graph is the class of RDF Graphs as defined by RDF Concepts.
]]
I don't think a graph can be "made" by that definition; it just "is".
Andy
