The Resource Description Framework (RDF) uses Internationalized Resource Identifiers (IRIs) to identify resources, subject-predicate-object triples to make statements and groups triples into RDF graphs. An RDF dataset contains a default graph and some named graphs. Subjects and predicates typically are IRIs while objects can be IRIs or literals.

URL — a Uniform Resource Locator, used as a basic general identifier

RDFTriple — a triple in an RDF graph, consisting of subject, predicate and object nodes

RDFStore — an RDF graph or dataset

RDFBlankNode — a blank node

RDFCollection — list-like collections in RDF graphs and SPARQL queries

Literals

"string" — a string literal

RDFLiteral — a datatyped literal

RDFString — a language-tagged string

1, 2, True, False, … — simple literals

Formats

"NTriples", "Turtle" — text-based formats for RDF graphs

"NQuads", "TriG" — text-based formats for RDF graphs and datasets

"JSONLD" — JSON-based format for RDF graphs and datasets

"RDFXML" — XML-based format for RDF graphs