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Erschienen in:
01.10.2023
Metaclasses in UML and in Programming Languages
Erschienen in: Programming and Computer Software | Ausgabe 5/2023
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Abstract
Design and programming are important stages of the development process of object-oriented information systems. At the design stage, a problem domain model is built, usually in the form of a UML class diagram. Sometimes it is convenient for a designer to apply the concept of metaclass to model the problem domain. However, UML does not directly support metaclasses. It is described how in some cases it is possible to move from models with metaclasses to models with standard classes. Examples are given showing the capabilities of Python, Scala, and Objective-C for implementing such models. In addition, an analysis of differences in the interpretation of the concept of metaclass in these languages is carried out.