is-a versus has-a principle Comparison Table

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is-a versus has-a principle comparison table

Subject is a kind of state is a subtopic of

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is-a versus has-a principle principle that if you find yourself using the phrase "an X is a Y" when describing the relation between two classes, then the first class is a subclass of the second; if you find yourself using "X has a Y", then instance of the second class appear as parts of instances of the first class Inheritance

Subject	is a kind of	state	is a subtopic of
principle	kbTop
is-a versus has-a principle	principle	that if you find yourself using the phrase "an X is a Y" when describing the relation between two classes, then the first class is a subclass of the second; if you find yourself using "X has a Y", then instance of the second class appear as parts of instances of the first class	Inheritance

Next principle: look-it-up principle Up: principle Previous principle: explicit-representation principle