OpenCASE, an original CASE tool supporting conceptual modelling is presented in this paper. The CASE tool has been developed during the research focused on the ontology-centred conceptual modelling. It provides a strong emphasis on terms and their relations while supporting standard notations (now BORM, other notations are planned). The tool has an open plug-in-based architecture founded on the Eclipse platform, which makes the tool modular and extensible. The knowledge base of the models may be accessed via an API and thus used to implement verifications, various calculations (statistics), to transform models to outputs (reports) and to make inner transformations (e.g. normalisation). The architecture of the tool is briefly mentioned as well.

No abstract

No abstract

There are only very few approaches to normalizing object-oriented data. In this paper we present an approach to normalization of the object-oriented conceptual model based on UML class diagrams. First part of the paper describes the current status in the area of formal methods used for object-oriented data modeling. Second part presents four normalization rules, which are based on own experience and modied Ambler-Beck approach. These normalization rules are introduced on an example. Our method has been used in education at several universities. It has been and is also used for database design in software development projects, which we carried out. Recently, development of the CASE tool based on this approach has been started.