This author has not been identified. Look up 'Dieter Fensel' in GoogleThis author has not been identified. Look up 'Jürgen Angele' in GoogleThis author has not been identified. Look up 'Stefan Decker' in GoogleThis author has not been identified. Look up 'Michael Erdmann' in GoogleThis author has not been identified. Look up 'Hans-Peter Schnurr' in GoogleThis author has not been identified. Look up 'Steffen Staab' in GoogleThis author has not been identified. Look up 'Rudi Studer' in GoogleThis author has not been identified. Look up 'Andreas Witt' in Google