delet relationship param elem relationship delet delet relationship relationship elem core delet relationship elem elem flow core delet flow elem elem gener core delet gener elem elem uml associ core delet associ elem elem associ role collabor delet associ role elem elem depend core delet depend elem elem abstract core delet abstract elem elem bind core delet bind elem elem usag core delet usag elem elem permiss core delet permiss elem elem includ us case delet includ elem elem extend us case delet extend elem 