This paper describes a notation for the formal specification of software packages. The main influences are the guarded commands of Dijkstra and the Algebraic Semantics of Guttag. However, a novel operator denoted by % is introduced, which allows algorithms to be abstracted in a specification, thereby creating a true specification language rather than another higher level language. The notation, called ADL\/1, is designed to be used in conjunction with ADA but is equally suitable for other languages, and has been used for real time software written in Assembler and in a PASCAL-like language.<\/p>\n","protected":false},"excerpt":{"rendered":"
This paper describes a notation for the formal specification of software packages. The main influences are the guarded commands of Dijkstra and the Algebraic Semantics of Guttag. 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