Hi >So, I need a documentation of the meta-model 'Magritte'. > > you should post on this list for Magritte related questions ;) smallwiki at iam.unibe.ch and go to: www.lukas-renggli.ch and then Magritte for documentation and exercices ;) See you Cédrick ps: Steph, are all questions valid for the + one point ? ;)