Ontologies are formal specifications of how to represent the entities in a specific area and the interrelations among them. In the Semantic Web, ontologies can be used to share and reuse knowledge via the Web and they can be seen as a means for knowledge management on a global scale. A specific wiki ontology can be built to integrate Wikipedia (and by extension other MediaWiki-based sites) into the Semantic Web framework and to make Wikipedia machine-processable and -understandable. Through the use of RDF (Resource Description Framework, a W3C recommendation) and URIs, Wikipedia content could be identified, described, linked and combined with other Semantic Web data sources.
