DFKI-LT - On the efficient implementation of German verb placement in HPSG

Berthold Crysmann
On the efficient implementation of German verb placement in HPSG
1 Proceedings of RANLP 2003, o.A., 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.
 
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