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      Investigating Miraculous Specifications

      proceedings-article

      3rd BCS-FACS Northern Formal Methods Workshop (NFM)

      BCS-FACS Northern Formal Methods Workshop

      14-15 September 1998

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            Abstract

            In order to use expressions as the basis of a specification language, we admit undefinedness, and introduce nondeterminism through the use of a choice operator. We extend expressiveness of the language by allowing choice from a set of values. Such a set could be infinite, giving unbounded non-determinism, or it could be empty, producing miracles. In this paper we treat the miraculous specification, examining its uses and highlighting related problems. In particular, we find that miracles promote the possibility of specification in parts, and piecewise refinement. However, their undesirable properties mean that we must limit their use. A biased choice operator is introduced as a method of totalising miraculous expressions. Finally, the formation of miraculous functions is considered with reference to their use and manipulation.

            Content

            Author and article information

            Conference
            September 1998
            September 1998
            : 1-12
            Affiliations
            [0001]Information Technology Centre,

            National University of Ireland, Galway

            Galway, Ireland
            Article
            10.14236/ewic/NFM1998.9
            182063d7-eed1-41fe-b719-5be2b5af38fe
            © Sharon Flynn. Published by BCS Learning and Development Ltd. 3rd BCS-FACS Northern Formal Methods Workshop, Ilkley, UK

            This work is licensed under a Creative Commons Attribution 4.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

            3rd BCS-FACS Northern Formal Methods Workshop
            NFM
            3
            Ilkley, UK
            14-15 September 1998
            Electronic Workshops in Computing (eWiC)
            BCS-FACS Northern Formal Methods Workshop
            Product
            Product Information: 1477-9358BCS Learning & Development
            Self URI (journal page): https://ewic.bcs.org/
            Categories
            Electronic Workshops in Computing

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