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
