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What is aggregation in UML and how is it represented? Explained it is a has a relationship and a hollow diamond is used ?

What is aggregation in UML and how is it represented? Explained it is a "has a" relationship and a hollow diamond is used ?

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aggregation is a specific type of relationship between classes that conveys a hasa concept It represents a partwhole relationship where one class the whole or aggregate is composed of several instance... blur-text-image

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