Enterprise, Business-Process and Information Systems Modeling : 12th International Conference, BPMDS 2011, and 16th International Conference, EMMSAD 2011, held at CAiSE 2011, London, UK, June 20-21, 2011. Proceedings - Terry Halpin, Selmin Nurcan, John Krogstie, Pnina Soffer, Erik Proper, Rainer Schmidt, Ilia Bider ((Lecture Notes in Business Information Processing))