A Survey of Knowledge Sources in Dialogue Systems
Annika Flycht-Eriksson · 1999
Dialogue systems utilise a variety of knowledge sources and models. However, there is a confusion concerning the purposes and contributions of specific models and the relationships among them. In this paper we present a study of different dialogue systems and the knowledge sources and models they use. The models are characterised in terms of what knowledge they contain and the roles of various models and the relations between them are discussed. Implications for development of dialogue systems are also presented. 1 Introduction Today much research is carried out within the area of natural language interfaces and dialogue systems, and more and more systems are becoming publicly available. Most of the systems provide information retrieval services or assistance in solving a specific task. The systems differ in complexity due to the domain and the approach taken in the design. Some systems are very knowledge intensive and contain several interacting knowledge sources and mode...