- From: William Waites <wwaites@tardis.ed.ac.uk>
- Date: Fri, 14 Oct 2011 11:45:20 +0100 (BST)
- To: ian.davis@talis.com
- Cc: public-rdf-wg@w3.org
On Fri, 14 Oct 2011 10:45:34 +0100, Ian Davis <ian.davis@talis.com> said: iand> Example Document 3 in the TriG spec[1] shows the same blank iand> node label being used in different graphs. My interpretation iand> of the example is that those blank nodes are distinct, iand> i.e. the scope of blank node labels is the graph not the iand> TriG document. How do the main graph stores behave? Is it iand> possible to put the same blank node into two different iand> graphs? If so, this information would not be serializable in iand> TriG if my interpretation is correct. I agree with your interpretation. However 4store appears to have different behaviour here: @prefix ex: <http://example.org/>. ex:g1 { _:s a ex:T } ex:g2 { _:s a ex:T } And this query: SELECT * WHERE { { GRAPH <http://example.org/g1> { ?s ?p ?o } } UNION { GRAPH <http://example.org/g2> { ?s ?p ?o } } } Shows the bnodes as having been merged when you run it here: http://gallows.inf.ed.ac.uk/data/test/ (note, I converted the TriG document to N-Quads to import it but I don't think that should matter) -w
Received on Friday, 14 October 2011 10:46:03 UTC