Case study: Class diagram restructuring

Abstract

This case study is an update-in-placerefactoringtransformationon UML class diagrams. Its aim is toremove clones of attributes from a class diagram, and to identify new classes which abstract groupsof classes that share common data features.It is used as one of a general collection of transformations (such as the removal of redundantinheritance, or multiple inheritance) which aim to improve the quality of a specification or designlevel class diagram.The transformationis a typical example of a model refactoring,and illustrates the issues involvedin such transformations.