Various W3C standards, including RDF and OWL, provide semantic
interpretations for RDF graphs that allow additional RDF statements to be
inferred from explicitly given assertions. An entailment regime specifies
how an entailment relation can be used to redefine the evaluation of basic
graph patterns from a SPARQL query using the SPARQL extension point for
basic graph patterns matching. A user may want to request data that
conforms to a shape but after using a specific entailment relationship,
such as an RDF Schema or RIF entailment.