Basic RDF Structures
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