Kent, Stuart and Howse, John
Mixing Visual and Textual Constraint Languages.
In: 2nd International Conference on the Unified Modeling Language (UML 99), Oct 28-30, 1999, Ft Collins, Colorado.
(Full text available)
The Object Constraint Language (OCL) is a precise language for notating behavioural constraints on UML models. Constraint diagrams have been proposed as a means of notating similar constraints, but in a visual form. This paper explores the utility of these two notations for depicting constraints, and shows how they can be used effectively together. The goal of this work is to provide more intuitive and expressive languages to support the construction and presentation of rich and precise models.
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