Physical Sciences and Mathematics Commons^™

Extending Ocl To Better Express Uml Qualified Associations, Alla Dove, Aditi Barua, Yoonsik Cheon

Departmental Technical Reports (CS)

A qualified association in the Unified Modeling Language (UML) is an association that allows one to restrict the objects referred in an association using a key called a qualifier. A qualified association can appear in a constraint written in the Object Constraint Language (OCL) to specify a precise UML model. However, the OCL notation fails to provide appropriate support for expressing certain types of constraints written using qualified associations. In this paper we first describe a deficiency of OCL in expressing qualified associations and then propose a small extension to OCL to make it more expressive. The key idea of …