Analysis of GoF Design Patterns used in Knowledge Processing Systems

To increase the quality of knowledge processing systems and provide help to software developers, selected existing knowledge processing systems are analysed for the occurrence of used object-oriented design patterns (especially from the Gang-of-Four catalogue). This analysis intends to draw attention to the lack of good software design in the area of knowledge processing systems and at the same time provides a smaller catalogue of design patterns with proven usage in practice, to support development. The design patterns were identified manually in a structured analysis by reverse engineering the source code, supported by a design pattern detection tool. As a result, Gang-of-Four design patterns, suitable for developing custom knowledge processing systems, are presented and discussed.