Mira Balaban Jordi Cabot Martin Gogolla Claas Wilke Proceedings of the 12th Workshop on OCL and Textual Modelling, Innsbruck, Austria, September 30, 2012 ACM OCL@MoDELS 2012 978-1-4503-1799-3 http://dl.acm.org/citation.cfm?id=2428516 db/conf/models/ocl2012.html