TESTING IN SOFTWARE PRODUCT LINES - A Model based Approach Topics: Engineering Information System; Model Driven Architectures and Engineering; Modeling Formalisms, Languages, and Notations (e.g. UML, ER variants); Requirements Analysis And Management; Software Engineering; Tools, Techniques and Methodologies for System Development In Proceedings of the 13th International Conference on Enterprise Information Systems - Volume 4: ICEIS, 46-54, 2011 , Beijing, China