José Eduardo Rivera José Raúl Romero Antonio Vallecillo Behavior, Time and Viewpoint Consistency: Three Challenges for MDE. 60-65 2008 MoDELS Workshops http://dx.doi.org/10.1007/978-3-642-01648-6_7 conf/models/2008w db/conf/models/models2008w.html#RiveraRV08