context given model element param model element creat context context model element context object todo want isa uml element model facad model element object mn context inner enclos namespac model facad behavior featur buffer sb context buffer context sb context append model facad mn context sb context append sb context append model facad sb context append collect param model facad paramet type param iter param iter object mp paramet model facad mp type model facad model facad type mp param param sb context append sb context append model facad type mp append sb context append model facad model facad type mp sb context append ocl toolkit doe like type type type equal ignor sb context append append type sb context context model facad mn context 