Setting the multiplicity property

In UML models, you can set the multiplicity value, or range of values, on both ends of an association between classifiers to show the number of objects that can participate in the relationship. You can also set the multiplicity of an attribute to specify the number of values that you can associate with that attribute.

To set the multiplicity property:
  1. In the diagram editor, click an association or an attribute.
  2. In the Properties view, click the General tab.
  3. On the General page, complete one of the following steps:
    • For an association, in the multiplicity field for each end of the association, type a value.
    • For an attribute, in the multiplicity field, type a multiplicity value or range of values.

Parent topic: Setting the properties of a model element

Related concepts
Model element properties
Model element default values

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