A case-based reasoning approach to the reusability of CWM metadata

A decisional process is usually held by one or more expert users having different viewpoints. That is, they manipulate several knowledge and know-how with different objectives, preferences, competencies, and different visions on the data warehouse entities. In this paper, we propose to establish coordination and knowledge sharing between users of a decisional process based on the Common Warehouse Metamodel (CWM) standard to enhance reusability in terms of viewpoint within a system and to promote a good coordination between users of a multi-view analysis. After a brief review of our approach of viewpoint in CWM, we will first model and formalize interaction and interdependence between various analyses according to different viewpoints through introducing a set of relations between viewpoints. These relations allow us to ensure coordination and mutual understanding between different users of a decisional process based on the CWM. Then, based on those relations, we propose a Case-Based Reasoning (CBR) process with the aim to improve reusability of users' analysis and experiences, and to guide novice users during the exploitation of the decisional process in terms of viewpoint.