DecSerFlow Towards a Truly Declarative Service Flow Language Wil van der Aalst & Maja Pesic Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven,
Constraint-Based Workflow Models Change Made Easy! Maja Pesic Helen Schonenberg Natalia Sidorova Wil van der Aalst Eindhoven University of Technology.