4. Representing Unidirectional Associations as Reference Properties
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4. Representing Unidirectional Associations as Reference Properties

A unidirectional association between a source and a target class can be be represented as a reference property of the source class. For the case of a unidirectional one-to-one association, this is illustrated in Figure 11.3 below.

Figure 11.3. Representing the unidirectional association ClubMember has Committee as chairedCommittee as a reference property

Representing the unidirectional association ClubMember has Committee as chairedCommittee as a reference property
Representing the unidirectional association ClubMember has Committee as chairedCommittee as a reference property
Representing the unidirectional association ClubMember has Committee as chairedCommittee as a reference property

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3. Modeling Reference Properties as Unidirectional Associations Home 5. Adding Directionality to a Non-Directed Association