Object-oriented data models are receiving wide attention since they provide expressive ionmechanismsto model naturally and directly both structural and behavioral aspectsof comple...
This paper aims at integrating techniques of non-monotonic reasoning about updates and of object-oriented specification of information systems. We present how to utilize defaults i...
The development of the programming languages Simula I and Simula 67 is briefly described. An attempt is made also to explain the cultural impact of the languages, in particular t...