5.28 What is a weak entity? How do weak entities relate to ID-dependent entities?
5.30 Define subtypeandsupertype. Give an example of a subtype–supertype relationship
(other than one presented in this chapter).
5.31 Explain the difference between exclusive subtypes and inclusive subtypes. Give an
example of each.
5.32 What is a discriminator?
5.33 Explain the difference between IS-Aand HAS-Arelationships.
5.39 Describe two tests for determining if an entity is a strong entity.
5.42 How can you assess minimum cardinality for the entities in the form in Figure 5-17?
5.44 Name three patterns that use ID-dependent relationships.
5.45 Explain how the association pattern differs from the N:M strong entity pattern. What
characteristic of the report in Figure 5-21indicates that an association pattern is needed?
5.53 What entity type should come to mind when you see the words “For use by” in a form?