Understanding Relationships

This is a simple UML class diagram example that shows the use of various UML relationships in a class diagram.

1. School has one or more Departments.
2. Department offers one or more Subjects.
3. A particular subject will be offered by only one department.
4. Department has instructors and instructors can work for one or more departments.
5. Student can enroll in up to 5 subjects in a School.
6. Instructors can teach up to 3 subjects.
7. The same subject can be taught by different instructors.
8. Students can be enrolled in more than one school.