Data and Information Modelling. Proceedings of the BERKOM Workshop in Hoechst-Annelsbach/Odenwald on July 9-13, 1990

摘要

The BERKOM project has been launched to promote the development of future services and end systems for broadband ISDN, so that various kinds of applications may profit from the new technology. The workshop covered general aspects of information as related to data and real-world concepts, explained useful and commonly accepted modelling techniques and provides some examples of specific information/data models within certain application areas relevant to the BERKOM project. The report begins with a collection of summaries of workshop presentations. Among these contributions the basic concepts of INFOMOD and its survey on the information and data aspects provide considerable understanding and clarification. It contains an overview of data modelling activities in the database area - sorted by concepts rather than by models. The comparatively small set of basic modelling concepts inherent to the numerous data models are emphasized. It provides an overview of object-oriented concepts and notions, which is of particular value regarding the lack of a common definition of object orientation. It starts with some fundamental principles, describes concepts such as data abstraction, inheritance and polymorphism, and relates to formal specification and object-oriented languages. A short overview is given of object-oriented modelling approaches in the areas of data bases, distributed systems, and multimedia data.