Dan Chiorean Birgit Demuth Martin Gogolla Jos Warmer OCL for (Meta-)Models in Multiple Application Domains. 152-158 2006 conf/models/2006w MoDELS Workshops http://dx.doi.org/10.1007/978-3-540-69489-2_19 db/conf/models/models2006w.html#ChioreanDGW06