Introduction

	This lesson is on the Semantic Web, information is modeled primarily with a set of three complementary languages: the Resource Description Framework (RDF), RDF Schema (RDFS), and the OWL Web Ontology Language.
	RDF defines the underlying data model and provides a foundation for the more sophisticated features of the higher levels of the Semantic Web layer cake.
	Semantic Web information modeling with RDF is the main subject to discuss here.