- From: Seaborne, Andy <andy.seaborne@hp.com>
- Date: Mon, 13 Mar 2006 18:12:37 +0000
- To: Olivier Corby <Olivier.Corby@sophia.inria.fr>
- CC: public-rdf-dawg-comments@w3.org
Olivier Corby wrote: > I think there is something wrong in the first definition of section 8 > Querying the Dataset. I mentionned it last year and it was nicely > corrected by Andy but the correction disappeared (may be there is a good > reason, but I ignore it) : Some kind of error - different place :-( > > > Definition: RDF Dataset Graph Pattern > > If D is a dataset {G, (<u1>, G1), ...}, and P is a graph pattern then S > is a pattern solution of RDF Dataset Graph Pattern GRAPH(g, P) if either of: > > 1. g is an IRI where g = <ui> for some i, and S is pattern solution > of P on target graph Gi. > 2. g is a variable, S maps the variable g to <ui> and S is a pattern > solution of P on target graph Gi > > > Should be : > > > 1. g is an IRI where g = <ui> for some i, and S is pattern solution > of P on dataset {Gi, (<u1> G1), ...} > 2. g is a variable, S maps the variable g to <ui> and S is a pattern > solution of P on dataset {Gi, (<u1> G1), ...} > > > > The reason is that pattern P may contain another dataset graph pattern > that must be matched on the dataset, not on Gi only, e.g. : > > graph ?src1 { PATTERN . graph ?src2 { PATTERN } } > > > Best regards, > > Olivier. Corrected along the lines of your suggestion. This also means that the definition for "target graph" (sec 7) can be removed as it is no longer needed and I have reworded some text in 2.4 also. I hope this addresses your comment - please let us know if it does. Andy
Received on Monday, 13 March 2006 18:12:49 UTC