What Exactly Is the “Semantic Web”?URLs, URIs, IRIs, and NamespacesThe Resource Description Framework (RDF)Storing RDF in FilesStoring RDF in DatabasesData TypingMaking RDF More Readable with Language Tags and LabelsBlank Nodes and Why They’re UsefulNamed GraphsReusing and Creating Vocabularies: RDF Schema and OWLLinked DataSPARQL’s Past, Present, and FutureThe SPARQL SpecificationsSummary