An example query,
WHERE name $LIKE "%.html"
AND lastModified BETWEEN toDate('01-12-2004')
I've blogged previously, Using RDF to improve Object-First Development. This is an example that is the same principal as Kowari's resolvers (or any idea of smushing metadata like Gnowsis) - allowing anything to be treated as RDF (or in JoSQL's case SQL).