HASA
Has-a
In database design and object oriented program architecture, has-a is a relationship where one object "belongs" to another object, and behaves according to the rules of ownership. In simple words, has-a relationship in an object is called a member field of an object. Multiple has-a relationships will combine to form a possessive hierarchy. This is contrasted with an Is-a relationship which constitutes a different kind of hierarchy . The decision whether the most logical relationship for an object and its subordinate is not always clearly has-a or is-a. Confusion over such decisions have necessitated the ...The above text is a snippet from Wikipedia: Has-a
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