What does a modality of "Optional" mean in a relationship?
- The relationship is mandatory for all entities involved
- The relationship is not necessary for the entities involved
- The relationship is optional for all entities involved
- The relationship is optional for one entity and mandatory for the other entity
In a relationship with a modality of "Optional," it means that the relationship is optional for all entities involved. This implies that an entity can exist without being associated with another entity through the specified relationship.
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