Zusammenfassung: |
The general goal in implementing dialogue systems is in most cases to provide some kind of human-computer-interface
for rational interaction. For that purpose, an approach is required which enables such a system to satisfy user goals in a
given (ideally open) domain by conducting spoken dialogues. Furthermore, it should be possible to augment it by other
kinds of multi-modal interaction like gestures or the selection of items from a menu on a screen. Interactions are called
"rational" because rationality principles - at the knowledge representation level - should be applied to optimally
select appropriate communicative actions. In this article, different approaches to the understanding of dialogues and
the implementation of dialogue systems will be presented. As a basis for comparing the approaches, fundamental issuses
of language understanding, speech act theory, and theories of rational interaction are outlined. To give an impression of
their implications for the implementation of dialogue systems, we refer to the system framework developed in Erlangen,
which has been applied in various projects, as a show case throughout the paper. |
