2002 pfps@research.bell-labs.com Peter F Patel-Schneider Peter F. Patel-Schneider http:/www.bell-labs.com/user/pfps/ simeon@research.bell-labs.com Jérôme Siméon Jérôme Siméon http:/db.bell-labs.com/user/simeon/

600 Mountain Avenue

Murray Hill, New Jersey U. S. A. Bell Labs Research http://www.bell-labs.com/