David Carlson, the CTO of Ontogenics Corporation, is an experienced researcher, developer, author, instructor, and e-business consultant. He is a frequent contributor to several technical journals, and has been a speaker at recent OOPSLA and XML conferences. In addition, he has taught graduate level courses in knowledge-based systems and computer architecture, and was a Sun-certified instructor for Java 1.0. During his 20-year career, Mr. Carlson's focus has been on creating practical applications of leading edge technology, including application modeling and XML vocabularies.