Marcus Fontoura has led several framework projects in the last four years and specializes in Web-based software development and service-oriented architectures. He has recently held research posts at the Computer Systems Group, University of Waterloo, Canada, and Princeton University Computer Science Department, U.S.A. He is currently a research staff member at the Computer Science Department, IBM Almaden Research Center. Wolfgang Pree is professor of computer science at the University of Constance, Germany until the end of 2001, moving to the University of Salzburg, Austria, in 2002. He has worked for several years in various areas of software engineering, in particular focusing on object technology, software architectures, frameworks, and human-computer interaction. Wolfgang is the author of Design Patterns for Object-Oriented Software Development (Addison-Wesley/ACM Press, 1995). Bernhard Rumpe is leading consulting and research projects on software engineering technology, such as UML, frameworks, modeling notations, object-technology, and lightweight and agile development processes at the Technische Universität München. His primary interest is to enhance the foundations of software and systems engineering to achieve a problem-adequate portfolio of software development skills that improve the quality and time-to-market of the product as well as allowing a better prediction in the development process. He is also co-founder of a consultancy company dealing with process, methodical and modeling issues focusing on e-business and has co-authored several books and contributed to many articles in these areas.