- From: Olaf Hartig <hartig@informatik.hu-berlin.de>
- Date: Fri, 30 Nov 2007 12:21:55 +0100
- To: public-rdf-dawg-comments@w3.org
Hello, In section 12.5 the SPARQL spec. defines an evaluation semantics using an operation eval. The result of this operation seems to be a multiset of solution mappings and the 2nd operator is said to be a graph pattern. The given definitions contain symbols like LeftJoin. The meaning of these symbols confuses me. Do they represent graph patterns or algebra operators? Or, do you use the same symbol for both - graph patterns in the left part of the equation and algebra operators in the right? Thanks, Olaf
Received on Friday, 30 November 2007 11:22:13 UTC