Service-Oriented Computing ICSOC 2006 : 4th International Conference, Chicago, IL, USA, December 4-7, 2006, Workshop Proceedings - Dimitrios Georgakopoulos, Norbert Ritter, Boualem Benatallah, Christian Zirpins, George Feuerlicht, Marten Schoenherr, Hamid R. Motahari-Nezhad ((Lecture Notes in Computer Science))