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Isa (computer science)

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Overview

In object-oriented programming (OOP) and both database theory and design, 'isa' refers to a special type relationship which can exist between objects. There are two relatively common instances where objects may have an 'isa' relationship:

  • If one or more objects (children) can have an isa relationship with another object (parent) if the if the children inherit from the parent.
  • If one or more objects implement a common interface or extend an abstract class, they will have an is-a relationship with whatever they are implementing/extending.

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