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Four groups of two, either complementing or contrasting abstraction principles are isolated: REPRESENTATIONAL and OPERATIONAL abstraction; CONFIGURATIONAL versus HIERARCHICAL abstraction; STATE-MACHINE- versus REFERENTIALLY TRANSPARENT, FUNCTIONAL- abstraction; and DENOTATIONAL versus MECHANICAL specification. Tools, techniques and examples are presented for, respectively of, each of the eight principles.

lecture notes in computer science

Software abstraction principles: Tutorial examples of an operating system command language specification and a PL/I-like on-condition language definition