NDLI: Verification of UML-based real-time system designs by means of cTLA

Content Provider	IEEE Xplore Digital Library
Author	Graw, G. Herrmann, P. Krumm, H.
Copyright Year	2000
Description	Author affiliation: Fachbereich Inf., Dortmund Univ., Germany (Graw, G.)
Abstract	The Unified Modeling Language UML is well-suited for the design of real-time systems. In particular the design of dynamic system behaviors is supported by interaction diagrams and statecharts. Real-time aspects of behaviors can be described by time constraints. The semantics of the UML, however, is non-formal. In order to enable formal design verification, we therefore propose to complement the UML based design by additional formal models which refine UML diagrams to precise formal models. We apply the formal specification technique cTLA which is based on L. Lamport's Temporal Logic of Actions, TLA. In particular cTLA supports modular definitions of process types and the composition of systems from coupled process instances. Since process composition has superposition character each process system has all of the relevant properties of its constituting processes. Therefore mostly small subsystems are sufficient for the verification of system properties and it is not necessary to use complete and complex formal system models. We present this approach by means of an example and also exemplify the formal verification of its hard real-time properties.
Starting Page	86
Ending Page	95
File Size	110421
Page Count	10
File Format	PDF
ISBN	0769506070
DOI	10.1109/ISORC.2000.839515
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2000-03-17
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Real time systems Unified modeling language Electrical capacitance tomography Logic Collaborative work Packaging
Content Type	Text
Resource Type	Article

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