Use this link for an HTML representation of this OWL ontology.
This OWL based ontology is (currently) fairly simple and is intended to serve as part of a complete system:
Email Mark if you want this ontology as an XML file.
This work will be used in the future when I update the KBtextmaster product with functionality to automatically extract RDF from plain text. The RDF extraction fucntionality will be hand tailored to a few specific RDF Schemas and my limited OWL ontologies.