Role:   Semantic interoperability of data model; site usability.
Date:   Jan 2007 - May 2007
Link:   http://cohere.open.ac.uk/help/
Link:   [ontology src] http://cohere.open.ac.uk/ontology/cohere.owl
Link:   [ontology docs] http://cohere.open.ac.uk/help/rdf.php

Screenshots: