Type Inheritance and Relational Theory: Subtypes, Supertypes, and Substitutability

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Type inheritance is that phenomenon according to which we can say, for example, that every square is also a rectangle, and so properties that apply to rectangles in general apply to squares in particular. In other words, squares are a subtype of rectangles, and rectangles are a supertype of squares. Recognizing and acting upon such subtype / supertype relationships provides numerous benefits: Certainly it can help in data modeling, and it can also provide for code reuse in applications. For these reasons, many languages, ...

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Type Inheritance and Relational Theory: Subtypes, Supertypes, and Substitutability
2016, O'Reilly Media

ISBN-13: 9781491959992

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