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abstract data type

abstract data type in Technology
programming
(ADT) A kind of data abstraction where a type's internal form is hidden behind a set of access functions. Values of the type are created and inspected only by calls to the access functions. This allows the implementation of the type to be changed without requiring any changes outside the module in which it is defined.
Objects and ADTs are both forms of data abstraction, but objects are not ADTs. Objects use procedural abstraction (methods), not type abstraction.
A classic example of an ADT is a stack data type for which functions might be provided to create an empty stack, to push values onto a stack and to pop values from a stack.
Reynolds paper (http://cis.upenn.edu/~gunter/publications/documents/taoop94.html).
Cook paper "OOP vs ADTs" (http://wcook.org/papers/OOPvsADT/CookOOPvsADT90.pdf).
(2003-07-03)
The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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