What have we made? W3C RDF-based specifications
- RDF graph data model: freeform yet formal
- RDF/XML syntax: a format for sharing RDF statements in XML
- RDF schema: a basic vocabulary description language
- OWL, the Web Ontology Language: formal vocabulary semantics
- SKOS, an RDF vocabulary for sharing thesaurus-like data
- RDF Data Access: SPARQL ("Sparkle") query language and Web service protocol for RDF