The Formal Specification of a Small Bookshop Information System

A specification, and its development, for a small bookshop information system are discussed. the specification is presented using mathematics and the scheme calculus of C. Morgan and B. Sufrin (see ibid., vol.SE-10, no.2, p.128-142, 1984). An insight is given into how the specification was developed and why a formal specification is appropriate. >

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