abstraction (redirected from Abstracta)

abstraction

In object technology, determining the essential characteristics of an object. Abstraction is one of the basic principles of object-oriented design, which allows for creating user-defined data types, known as objects. See object-oriented programming and encapsulation.

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abstraction

1. Logic an operator that forms a class name or predicate from any given expression

2. an abstract painting, sculpture, etc.

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abstraction [ab′strak·shən]

(hydrology)

The draining of water from a stream by another having more rapid corroding action.

The part of precipitation that does not become direct runoff.

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1.		abstraction - Generalisation; ignoring or hiding details to capture some kind of commonality between different instances. Examples are abstract data types (the representation details are hidden), abstract syntax (the details of the concrete syntax are ignored), abstract interpretation (details are ignored to analyse specific properties).
2.	(programming)	abstraction - Parameterisation, making something a function of something else. Examples are lambda abstractions (making a term into a function of some variable), higher-order functions (parameters are functions), bracket abstraction (making a term into a function of a variable). Opposite of concretisation.