- From: Alexandre Bertails <bertails@w3.org>
- Date: Thu, 19 May 2011 14:42:28 +0200
- To: David McNeil <dmcneil@revelytix.com>
- Cc: Enrico Franconi <franconi@inf.unibz.it>, 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 Thu, 2011-05-19 at 07:35 -0500, David McNeil wrote: > > > > If I have the schema, I know where I expect to find the value. > If I > don't find it, I can deduce it's coming from a NULL. > > > > > > ID NAME > > > 100 Joe > > > 200 Bob > > > 300 Sue > > > > > > ID AGE > > > 100 30 > > > 200 NULL > > > > > I see. So from the example I was giving there would be a triple like: > > <200> a <rowFromAgeTable> > > And so the lack of a triple like: > > <200> <age> <x> > > means that there is a NULL entry for 200's age. Exactly. I believe this is what Juan tried to explain in his first email [1]. He got it right from the beginning but people kept speaking about producing an explicit triple :-) Alexandre. [1] http://www.w3.org/mid/BANLkTin2xM_jkR9Lr__u3iOaPn7644_TMg@mail.gmail.com > > -David > >
Received on Thursday, 19 May 2011 12:42:43 UTC