instanc delet delet link end attribut link depend collabor instanc set particip instanc param elem element delet delet instanc object elem elem instanc illeg argument except elem elem instanc instanc instanc elem delet link end model impl uml helper delet collect instanc link end delet attribut link valu model impl uml helper delet collect omg uml uml instanc ref outermost common behavior attribut link valu attribut link instanc delet collabor instanc set particip instanc iter omg uml uml instanc ref outermost collabor collabor instanc set particip instanc collabor instanc set instanc iter collabor instanc set ci collabor instanc set collect instanc ci particip instanc instanc size instanc contain elem model impl uml factori delet delet stimuli sender receiv model impl uml helper delet collect uml instanc elem ref outermost common behavior stimulu sender stimulu instanc elem model impl uml helper delet collect uml instanc elem ref outermost common behavior receiv stimulu stimulu instanc elem 