My personal interest is in a query language for RDF that's easy to use, and, among other things, has a negation operator that is intuitive. If SPARQL 1.1 adds a negation operator, that is good to know.
I would be interested to learn of a datalog-with-negation implemented by translating to SPARQL, since datalog and its variants is IMO intuitive. Are the results that show a mapping between a datalog variant and SPARQL just papers, or has someone actually implemented a Datalog-like front end that translates to SPARQL? I'd like to see that. Note: Axel cites a paper that translates in the other direction -- that's not what I'm after. - Bob
