<example:/class_to_class> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <example:/Category> .
<example:/class_to_class> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/2000/01/rdf-schema#Class> .
<example:/class_to_class> <example:/color> "blue" .
<example:/class_to_class> <example:/priority> "4"^^<http://www.w3.org/2001/XMLSchema#integer> .
