Change Aggregation Connector Form

In your modeling, when you create an Aggregation relationship it defaults to the weak (shared) form of the relationship, represented by a hollow diamond head. You can change this to the strong form (Composition), represented by a solid black diamond head.

Change the form of an Aggregation connector from weak to strong




Right-click on an Aggregation connector to display the context menu.



Select Set Aggregation to Composite.

The diamond is shown as filled.



If the connector is already a Strong (Composition) connector, the context menu option changes to Set Aggregation to Shared

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