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1988•International Conference on Software EngineeringRequires access

Algebraic specification of Macintosh's Quickdraw using OBJ2

Ataru T. Nakagawa, Kokichi Futatsugi, Satoru Tomura, T. Shimizu

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Abstract

We have described QuickDraw, a typical graphics package, using OBJ2, a powerful algebraic language now in the phase of experimental use as a specification language. The results testify the applicability of OBJ2 to some practical problem domains, as well as the premonitioned advantages the use of formal specification techniques brings. The work also sheds some critical lights upon the design of QuickDraw; we detect incomplete procedure definitions, and find imprecise the classification of procedures.

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What this paper is about

We have described QuickDraw, a typical graphics package, using OBJ2, a powerful algebraic language now in the phase of experimental use as a specification language. The results testify the applicability of OBJ2 to some practical problem domains, as well as the premonitioned advantages the use of formal specification techniques brings. The work also sheds some critical lights upon the design of QuickDraw; we detect incomplete procedure definitions, and find imprecise the classification of procedures.

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Available abstract

We have described QuickDraw, a typical graphics package, using OBJ2, a powerful algebraic language now in the phase of experimental use as a specification language. The results testify the applicability of OBJ2 to some practical problem domains, as well as the premonitioned advantages the use of formal specification techniques brings. The work also sheds some critical lights upon the design of QuickDraw; we detect incomplete procedure definitions, and find imprecise the classification of procedures.

Key concepts: Computer science, Programming language, Specification language, Algebraic specification, Graphics, Formal specification, Language Of Temporal Ordering Specification, Algebraic number

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