- One may want something like:
SELECT ?a, ?b
WHERE (?x 'parent' ?a)
(?b 'brother' ?x)
- (i.e., ‘b is the uncle of a’)
- W3C started a standardization work in this area in 2004
- Firs draft for a spec published in October 2004:
- “SPARQL Query Language for RDF”
- http://www.w3.org/TR/rdf-sparql-query/
- Similar facilities already implemented in Jena, RAP,…