[Property] query [Value] 
The language for the query engine is based on RQL (from ICS-FORTH), which offers full support for querying both plain RDF and RDF Schema. Our RQL implementation is slightly different than ICS-FORTH's because our interpretation of RDF Schema differs from theirs and because Sesame is less restrictive on the (RDF Schema-) ontologies that can be used. Our query engine does not support all features of RQL yet.