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A main objective of this paper was to show that problems with the modular design of current generation systems emerge when a reversible grammar is used. In order to maintain the modular design we have proposed an approach that is based on a strong integration of parsing and generation of grammatical structures using a reversible grammar and monitoring mechanisms. By means of such an integrated approach performing generation of unambiguous utterances as well as generation of paraphrases can be realized.


This research work has been supported by the German Science Foundation in its Special Collaborative Research Programme on Artificial Intelligence and Knowledge Based Systems (SFB 314, Project N3 BiLD). Many thanks go to Sergio Balari, John Nerbonne and Hans Uszkoreit for their valuable comments on earlier versions.

Noord G.J.M. van