[redland-dev] How does OPTIONAL work?

[Marinaio di terra]

On Mon, 2005-05-16 at 14:27 +0100, Chris Dollin wrote:

> >               "WHERE (<file:./sample.rdf#Ball> toy:name ?name) " +
> >               "OPTIONAL (<file:/sample.rdf#Ball> toy:version ?ver)",
> 
> Look carefully at the two file: URIs.
> 

Whoops, well you're right but the result doesn't change even setting the
wrong URI to <file:./sample.rdf#Ball>

Christian.