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Constraint Diagrams: A Step Beyond UML

Gil, Joseph, Howse, John, Kent, Stuart (1999) Constraint Diagrams: A Step Beyond UML. In: Proceedings of TOOLS USA'99. . IEEE Computer Society Press (doi:10.1109/TOOLS.1999.10066)


The Unified Modeling Language (UML) is a set of notations for modelling object-oriented systems. It has become the de facto standard. Most of its notations are diagrammatic. An exception to this is the Object Constraint Language (OCL) which is essentially a textual, stylised form of first order predicate logic. We describe a notation, constraint diagrams, which were introduced as a visual technique intended to be used in conjunction with the UML for object-oriented modelling. Constraint diagrams provide a diagrammatic notation for expressing constraints (e.g., invariants) that could only be expressed in UML using OCL.

Item Type: Conference or workshop item (Paper)
DOI/Identification number: 10.1109/TOOLS.1999.10066
Subjects: Q Science > QA Mathematics (inc Computing science) > QA 76 Software, computer programming,
Divisions: Faculties > Sciences > School of Computing > Systems Architecture Group
Depositing User: Mark Wheadon
Date Deposited: 04 Sep 2009 17:12 UTC
Last Modified: 28 May 2019 14:01 UTC
Resource URI: (The current URI for this page, for reference purposes)
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