Amit Sheth's keynote at SABPM '99: Software Architectures for Business Process Management, (Workshop at the CAiSE*99, Heidelberg, Germany, June 14-15, 2009. http://www.informatik.uni-hamburg.de/cgi-bin/TGI/pnml/getpost?id=1999/04/1203 Related paper: http://knoesis.org/library/resource.php?id=00246