References
S.Decker, D.Fensel, F. van Harmelen, I. Horrocks, S. Melink, M. Klein and J. Broekstra, “Knowledge Representation on the Web”, Description Logic, http://www.ontoknowledge.org/oil.
I.Horrocks et al, “The Ontology Inference Layer OIL”, http://www.ontoknowledge.org/oil.
J. Broekstra et al, “OIL: a case-study in extending RDF-Schema”, Technical Report, http://www.ontoknowledge.org/oil.
J. Hefflin, R. Volz, J. Dale, “Requirements for a Web Ontology Language”, W3C working Draft, http://www.w3.org/TR/2002/WD-webont-req-20020307.