W3C-RDF-WG

W3C RDF WG Web knowledge representation.

Definition

W3C RDF main publications: RDF 1.0 Concepts and Abstract Syntax (1999, Recommendation 2004), RDF 1.1 Concepts and Abstract Syntax (2014), RDF 1.1 Turtle (Terse RDF Triple Language), RDF 1.1 N-Triples, RDF/XML, JSON-LD (separate spec but RDF-compatible). RDF Schema (RDFS) extends RDF with class/property modeling. SPARQL 1.1 (2013) query language for RDF. OWL (Web Ontology Language) extends RDFS for complex ontologies. Knowledge Graph adoption: Google Knowledge Graph, Wikidata, DBpedia, schema.org all RDF-based.

Origin

RDF specification first published W3C 1999 ; RDF 1.0 Recommendation 2004 ; RDF Working Group recreated 2011-2014 for v1.1 ; RDF-Star Working Group 2022 for v1.2.

Example in context

Wikidata (knowledge base) stores ~100M items in RDF triples ; queries via public SPARQL endpoint ; example SELECT ?country WHERE ?country wdt:P31 wd:Q6256 returns all countries.

Related terms

• JSON-LD — alternative serialisation.