RDF, or the Resource Description Framework, is a standard model for data interchange on the web. It allows for the representation of information about resources in a structured way using triples, which consist of a subject, predicate, and object. RDF Query Language typically refers to SPARQL (SPARQL Protocol and RDF Query Language), which is the standard query language used to retrieve and manipulate data stored in RDF format.
New to topics? Read the docs here!