This is the 1-to-many binary relationship set between department and student entity sets 2. belongs to is the 1-to-many binary relationship set between department and instructor sets. for or a particular department there are many instructors however an instructor belongs to only 1 department. the participation of the instructor entity sets in this relationship sets is partial. 3. teaches is the many-to-many binary relationship sets between instructor and subjects. enrolls is the one-to-one binary relationship sets between student and exam candidate. component attributes are: date, month, and year.