- From: Richard Newman <rnewman@franz.com>
- Date: Fri, 1 Feb 2008 10:33:01 -0800
- To: Max Voelkel <voelkel@fzi.de>
- Cc: public-sparql-dev@w3.org
> is it possible to write a SPARQL query that given this data
<snip>
> returns only all subjects which belong only to class A?
> So in my example, only "ex:1" should be returned.
> Ah, and resources can have more than two classes.
I haven't run this, but this might do the trick...
SELECT ?x {
?x a ex:A .
OPTIONAL {
?x a ?bar .
}
FILTER (!bound(?x) || sameTerm(?bar, ex:A))
}
> 2) Is there any kind of collection on the web of common SPARQL
> problems and
> queries that solve it? Maybe some wiki page?
Lee runs the SPARQL FAQ:
http://thefigtrees.net/lee/sw/sparql-faq
Received on Friday, 1 February 2008 18:33:19 UTC