CommonTag

Common Tag http://commontag.org defines semantic tags that tools can understand and publish . Common Tags are references to unique, well-defined concepts, complete with metadata and their own URLs.

Common Tag builds on the experience of MOAT and others. It is RDFa based and it does not mandate a specific vocabulary of meanings for tags. DBpedia and Freebase are currently used by Zigtag, Faviki and Zemanta.

References

RDFa Examples

Extracting CommonTag RDF using the RDFa Distiller (pyRdfa).