A schema based approach to dialog control
Paul C. Constantinides, Scott Hansma, Chris Tchou, Alexander I. Rudnicky · 1998
Frame-based approaches to spoken language interaction work well for limited tasks such as information access, given that the goal of the interaction is to construct a correct query then execute it. More complex tasks, however, can benefit from more active system participation. We describe two mechanisms that provide this, a modified stack that allows the system to track multiple topics, and form-specific schema that allow the system to deal with tasks that involve completion of multiple forms. Domain-dependent schema specify system behavior and are executed by a domain-independent engine. We describe implementations for a personal calendar system and for an air travel planning system. 1. INTRODUCTION The success of frame-based information access systems, such as for the ATIS domain (e.g., Ward & Issar, 1994) and others (e.g, Goddeau et al., 1996), leads to the question of whether such an approach could be adapted for domains that may require more sophisticated dialog management. Idea...