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Object-Oriented Data Modeling
A solid diamond represents a stronger form of aggregation, known as composition.
True
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True
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Object-Oriented Data Modeling
In an object diagram, an object is represented as a rectangle with two compartments.
The reasons for overriding include extension, restriction, and optimization.
An aggregation is a stronger form of association relationship and is represented with a solid diamond at the aggregate end.
Each association has two or more roles.
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