Compilation of HPSG to TAG

Authors:
Robert Kasper;Bernd Kiefer;Klaus Netter;K. Vijay-Shanker
Affiliations:
Ohio State University, Columbus, OH;Deutsches Forschungszentrum für Künstliche Intelligenz, Saarbrücken, Germany;Deutsches Forschungszentrum für Künstliche Intelligenz, Saarbrücken, Germany;University of Delaware, Newark, DE
Venue:
ACL '95 Proceedings of the 33rd annual meeting on Association for Computational Linguistics
Year:
1995

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Abstract

We present an implemented compilation algorithm that translates HPSG into lexicalized feature-based TAG, relating concepts of the two theories. While HPSG has a more elaborated principle-based theory of possible phrase structures, TAG provides the means to represent lexicalized structures more explicitly. Our objectives are met by giving clear definitions that determine the projection of structures from the lexicon, and identify "maximal" projections, auxiliary trees and foot nodes.