A systems programmer for 27 years, involved in designing and developing databases for last 25 years, involved with SGML and development of XML database systems for last 8 years. Have been lecturer at Wilfrid Laurier University and University of Waterloo part time for the last 20 years.BSc. London (UK) 1974. Msc. Toronto 1982. Ph.D. Waterloo 1988.