- From: Enrico Franconi <franconi@inf.unibz.it>
- Date: Thu, 19 May 2011 16:26:49 +0200
- To: David McNeil <dmcneil@revelytix.com>
- Cc: Richard Cyganiak <richard@cyganiak.de>, Ivan Herman <ivan@w3.org>, Pat Hayes <phayes@ihmc.us>, Michael Hausenblas <michael.hausenblas@deri.org>, W3C RDB2RDF <public-rdb2rdf-wg@w3.org>
On 19 May 2011, at 14:10, David McNeil wrote: > Furthermore with the NULL values present in the Direct Mapping triples it is possible (albeit cumbersome) to write SPARQL queries that take into account the SQL semantics of NULL. I wouldn't say that my proposal is "cumbersome": just add a is-not-null test for each join variable. :-) --e.
Received on Thursday, 19 May 2011 14:27:17 UTC