Chapter 3 Building Conceptual Data Models

Creating a reflexive association in a CDM

A reflexive association is a relationship between an entity and itself.

To create a reflexive association:

1. Click the Association Link tool in the Palette.
2. Click inside the entity symbol and, while continuing to hold down the mouse button, drag the cursor a short distance within the symbol, before releasing the button.
3. Drag the resulting association symbol away from entity to make clear its two links to the entity:
   

In the example above, the reflexive association Manager expresses that an employee (Manager) can manage other employees.

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