- From: Enrico Franconi <franconi@inf.unibz.it>
- Date: Tue, 07 Mar 2006 16:46:33 +0100
- To: pfps@research.bell-labs.com
- Cc: eric@w3.org, connolly@w3.org, public-rdf-dawg-comments@w3.org
From: Peter F. Patel-Schneider <pfps@research.bell-labs.com> > > The scoping graph is always isomorphic to the original dataset - the > > only things that may change are the names of the bnodes. This has no > > effect on the answer set, apart from having possibly different bnode > > names. > > Sorry, I meant scoping *set*. Ah. Well, for (this version of) SPARQL the scoping set contains exactly the URIs, the Literals, and the bnodes from the scoping graph. It is a theorem that unde r these restrictions the definitions given in 2.5 uniquely identify the answer set - modulo renaming of bnodes - such that the answer set is exactly the outcome of the homomorphisms between the query and the scoping graph. cheers --e.
Received on Tuesday, 7 March 2006 15:47:15 UTC