Abstract
This paper outlines ESPRESO, a specification system for process control software, which was developed at Nuclear Research Center, Karlsruhe, Federal Republic of Germany. ESPRESO is based on some new ideas, which are combined with elements taken from other systems. ESPRESO consists of a set of concepts, a specification language, a tool for the management, evaluation and validation of specifications, and the method how to use the system. Language, tool, and method are carefully adapted to the concepts. The aim was to demonstrate some ideas not found in the specification systems currently available, rather than to provide another product for the software market.
The concepts of ESPRESO where abstracted from the most common tasks in real time programming, focusing on process communication. All operations are precisely defined. The concept of modules allows for the definition of static units which hide their internal structure from the outside.
An attribute grammar was used, which describes not only the context sensitive syntax of the language, but also the effect of operations on the stored specification.
The tool-component was partially coded in PASCAL, and installated on IBM-OS and VAX-VMS. While ESPRESSO is already being used for the specification of a nuclear reactor safety system, more components are being implemented in order to provide means for validation and documentation.
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Ludewig, J. (1985). Espreso — A system for process control software specification. In: Knuth, E., Neuhold, E.J. (eds) Specification and Design of Software Systems. OS 1982. Lecture Notes in Computer Science, vol 152. Springer, Berlin, Heidelberg. https://doi.org/10.1007/BFb0051563
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DOI: https://doi.org/10.1007/BFb0051563
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