Example: Registration Package Main StudentForm MainRegistrarForm <<boundary>> <<boundary>> Register ForCoursesForm CloseRegistration Form <<control>> <<control>> Registration controller CloseRegistration Controller 匡E喜9 Example: Registration Package MainRegistrarForm 1 1 MainStudentForm 1 RegisterForCoursesForm <<boundary>> 0..1 1 CloseRegistrationForm <<boundary>> 0..1 0..1 CloseRegistrationController <<control>> RegistrationController <<control>> 1