LangLAB: a natural language analysis system

Authors:
Tokunaga Takenobu;Iwayama Makoto;Tanaka Hozumi;Kamiwaki Tadashi
Affiliations:
Tokyo Institute of Technology;Tokyo Institute of Technology;Tokyo Institute of Technology;Hitachi Research Laboratory, Hitachi Ltd.
Venue:
COLING '88 Proceedings of the 12th conference on Computational linguistics - Volume 2
Year:
1988

Citing 5
Cited 0

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Metamorphosis Grammars

Natural Language Communication with Computers
Extraposition grammars

Computational Linguistics
Lexicon-grammar: the representation of compound words

COLING '86 Proceedings of the 11th coference on Computational linguistics
Language As a Cognitive Process: Syntax

Language As a Cognitive Process: Syntax

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Abstract

This paper presents a natural language analysis system LangLAB based on BUP-XG which parses with a bottom-up and depth-first strategy and has ability to handle left extraposition. We have already developed a grammar formalism XGS, which is a superset of DCG. With XGS, left extraposition phenomena is naturally expressed in grammar rules. We have also optimized BUP-XG clauses. Experiments showed that in comparison to the original BUP-XG system, the analysis sped up 10 times in the interpreter mode and 4 times in the compiled mode. The TRIE structured dictionary in LangLAB requires less memory, provides faster dictionary reference and also handles complicated idioms with versatility. Consequently, the utilization of LangLAB for practical purposes has become feasible.