Graph-Muster: Kartesisches Produkt :John foaf:knows :Tim . •:John foaf:name "John" . •:Tim foaf:knows :John . •:Tim foaf:name "Tim" .•SELECT ?person ?friendsname WHERE {• ?person foaf:knows ?friend . • ?somebody foaf:name ?friendsname•}••:John "John"•:John "Tim"•:Tim "John"•:Tim "Tim"