Definitions for is-a
This page provides all possible meanings and translations of the word is-a
The relationship between two entities in object-oriented computer programming in which one entity is inherited from the other.
Is a member of the class.
An apple is-a fruit.
In knowledge representation, object-oriented programming and design, is-a or is_a or is a is a relationship where one class A is a subclass of another class B. In other words, Type A is a subtype of type B when A’s speciﬁcation implies B’s speciﬁcation. That is, any object that satisﬁes A’s speciﬁcation also satisﬁes B’s speciﬁcation, because B’s speciﬁcation is weaker. The is-a relationship is contrasted with the has-a relationship, which constitutes the holonym-meronym hierarchy. It may also be contrasted with the instance-of relation: see type-token distinction. When designing a model of the real-world relationship between an object and its subordinate, a common error is confusing the relations has-a and is-a.
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