Berthold Daum holds a Ph.D. in mathematics and was a codeveloper of NATURAL 4GL at Software AG. He has lectured in database design at the University of Karlsruhe and has practical experience in the design and implementation of large distributed online systems. In the 1980s, he became involved in artificial intelligence and was a member of the ISO standardization committee for PROLOG. He has published various articles in trade magazines and scientific publications, and is co-author with Udo Merten of System Architecture with XML, and author of the forthcoming Modeling Business Objects with XML Schema. Currently he runs a consulting agency for industrial communication.