A Mime Type (mainType/subType) with optional parameters.
RDF readers for a given syntax.
A selector for RDFReaders based on the provided mimetype.
See: - [http://www.w3.org/TR/rdf-sparql-XMLres/](Sparql Query Results XML Format) - [http://www.w3.org/TR/rdf-sparql-json-res/](Sparql Query Results in JSON)
A syntax is defined by the Mime-Types associated with it.
the type of object that this Writer can serialize
the Syntax that this Writer supports