Introduction to Semantic Web Vision and Technologies - Part 5 - Building OWL Ontologies Using Protege 4 (Screencast) - Blog - Semantic Focus - The Semantic Web, Semantic Web technology and computational semantics

http://www.semanticfocus.com/blog/entry/title/introduction-to-semantic-web-vision-and-technologies-part-5-building-owl-ontologies-using-protege-4-screencast/