We have the basic technologies

• Stable specifications for the basics since 2004: RDF, OWL

• Work is being done to properly incorporate rules

• We have a standard for query since 2008: SPARQL

• We have some additional technologies to access/create RDF data: GRDDL, RDFa, POWDER, …

• Some fundamental vocabularies became pervasive (FOAF, Dublin Core,…)