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Efficient parsing for bilexical context-free grammars and head automaton grammars

, and . Proceedings of the 37th annual meeting of the Association for Computational Linguistics on Computational Linguistics, page 457--464. Stroudsburg, PA, USA, Association for Computational Linguistics, (1999)
DOI: 10.3115/1034678.1034748

Abstract

Several recent stochastic parsers use <i>bilexical</i> grammars, where each word type idiosyncratically prefers particular complements with particular head words. We present <i>O(n</i><sup>4</sup>) parsing algorithms for two bilexical formalisms, improving the prior upper bounds of <i>O(n</i><sup>5</sup>). For a common special case that was known to allow <i>O(n</i><sup>3</sup>) parsing (Eisner, 1997), we present an <i>O(n</i><sup>3</sup>) algorithm with an improved grammar constant.

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Efficient parsing for bilexical context-free grammars and head automaton grammars

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