Inheritance systems with exceptions

摘要

In this paper, we are interested in the representation and management of multiple inheritance systems with exceptions in both semantic networks and object-oriented languages. Exception management raises different problems, particularly in the presence of contradictions. Three types of contradictions, which constitute the problematics of exception management, may be identified. The different methods used to solve these contradictions are presented; two approaches in particular are underscored: a logic approach and an algebraic approach.