Download Fundamentals of Algebraic Specification 2: Module by Hartmut Ehrig, Bernd Mahr PDF

By Hartmut Ehrig, Bernd Mahr

Since the early seventies strategies of specification became important within the entire quarter of machine technology. particularly algebraic specification concepts for summary information kinds and software program structures have won significant significance lately. they've got not just performed a valuable position within the idea of information sort specification, yet in the meantime have had a notable impact on programming language layout, process architectures, arid software program instruments and environments. the basics of algebraic specification lay a foundation for educating, learn, and improvement in all these fields of computing device technology the place algebraic options are the topic or are used with virtue on a conceptual point. any such foundation, besides the fact that, we don't regard to be a synopsis of the entire diversified methods and achievements yet particularly a always built idea. this type of conception may still generally emphasize elaboration of easy suggestions from one viewpoint and, in a rigorous method, succeed in the cutting-edge within the box. We comprehend basics during this context as: 1. basics within the feel of a gently inspired advent to algebraic specification, that's comprehensible for computing device scientists and mathematicians. 2. basics within the experience of mathematical theories that are the root for distinct definitions, structures, effects, and correctness proofs. three. basics within the feel of options from computing device technology, that are brought on a conceptual point and formalized in mathematical terms.

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Extra resources for Fundamentals of Algebraic Specification 2: Module Specifications and Constraints

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This requires that with a modular system there are also features which support this change of view: (6) Operations on Modules Operations on modules define modules out of given modules and module interconnections. In this way they change the view of the architectural structure of a modular system. Like the components of a module the components of a modular system, including module operation, are to be given syntactically and semantically. To handle these components in the design of a modular system is the purpose of a module specification language.

This means that for every import algebra A the A-quotient tenn algebra F(A) is associated with the body specification. In fact F(A) is the free construction over A. 9 (2)). (3) The component interconnections specification morphisms are interpreted by functors (in reversed direction). They are called forgetful functors because they forget those parts of the resources which are not in the image of the specification morphisms. In other words they reduce import and export to the parameter part and the body to import and export respectively.

19 of volume 1: An abstract module is a class of modules closed under renaming of data domains, items and operations. This means that an abstract module is independent of the representation of a particular module. Abstract modules are presented by module specifications together with a particular semantical interpretation. The notion of an abstract module is defined in a precise way once we have defined syntax and semantics of a module specification (see chapter 2). 17. 11 (1). The body part of this module specification is realized using 'quick-sort' which very elegantly can be expressed in a functional way.

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