Multiplicity for Sharing

• An Airplane may have any number of Engines, but any particular Engine belongs to exactly 1 Airplane.

• A Landplane must have 2 or more Wheels.

• Any given Wheel, however, cannot belong to more than one Landplane.

Wings

Hull

Airplane

Seaplane

Landplane

Wheel

2..*

0..1

Engine

*

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