Ellipsis Resolution by Controlled Default Unification for Multi-Modal and Speech-Dialog Systems

Michael Streit, Hans-Ulrich Krieger

In: Proceedings of the ACL 2004 Workshop on Reference Resolution and Its Applications. ACL Workshop on Reference Resolution and Its Applications 2004.


We present a default-unification-based approach to ellipsis resolution that is based on experience in long running multimodal dialog projects, where it played an essential role in discourse processing. We extend default unification to non-parallel structures, which is important to speech and multimodal dialog systems. We introduce new control mechanisms for ellipsis resolution by considering dialog structure with respect to specification, variation and results of tasks and combine this with the analysis of relations between the information elements contained in antecedent and elliptic structures.

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Deutsches Forschungszentrum für Künstliche Intelligenz
German Research Center for Artificial Intelligence