- From: Orri Erling <erling@xs4all.nl>
- Date: Wed, 8 Jul 2009 15:44:52 +0200
- To: "'RDF Data Access Working Group'" <public-rdf-dawg@w3.org>
Received on Wednesday, 8 July 2009 13:45:47 UTC
Hi I'd point out the following omission: Virtuoso supports negation by failure through a SQL -like !bif:exists ((select .... where {...})) construct. Without the ! this is an existence test. Orri
Received on Wednesday, 8 July 2009 13:45:47 UTC