University Example (cont’d)

• Step 4. Determine level of participation

  • FACULTY-teaches-COURSE - level of participation is optional, since sometimes Faculty do not have to teach (e.g., sabbatical); similarly, a course may not have anyone interested in teaching it

(0,2)

(0,3)

• STUDENT-takes-COURSE - level of participation is mandatory since students must take at least one course; a course, however, may or may not have students taking it

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