Semantically Interlinked Online Communities

Semantically Interlinked Online Communities Project (SIOC (/ʃɒk/ SHOK[1])) is a Semantic Web technology.

It consists of the SIOC ontology, an open-standard machine-readable format for expressing the information contained both explicitly and implicitly in Internet discussion methods, of SIOC metadata producers for a number of popular blogging platforms and content management systems, and of storage and browsing/searching systems for leveraging this SIOC data.

The SIOC vocabulary is based on RDF and is defined using RDFS.

SIOC documents may use other existing ontologies to enrich the information described.

The SIOC project was started in 2004 by John Breslin and Uldis Bojars at DERI, NUI Galway.