On the efficient implementation of German verb placement in HPSG

Berthold Crysmann

In: Proceedings of RANLP 2003. International Conference on Recent Advances in Natural Language Processing (RANLP) 2003.


We report on significant performance gains (factor > 5.5 with ceiling effect, 14.7 without) that can be achieved by a redesign of the implementation of verb movement in an HPSG for German. We show that the move from uniformly right branching structures to variable left/right branching is not only defensible on linguistic grounds, but also leads to a more general grammar, if the formalism does not permit empty categories.

Deutsches Forschungszentrum für Künstliche Intelligenz
German Research Center for Artificial Intelligence