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Efficient Normal-Form Parsing for Combinatory Categorial Grammar

Jason Eisner
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Abstract

Under categorial grammars that have powerful rules like composition, a simple n-word sentence can have exponentially many parses. Generating all parses is inefficient and obscures whatever true semantic ambiguities are in the input. This paper addresses the problem for a fairly general form of Combinatory Categorial Grammar, by means of an efficient, correct, and easy to implement normal-form parsing technique. The parser is proved to find exactly one parse in each semantic equivalence class of allowable parses; that is, spurious ambiguity (as carefully defined) is shown to be both safely and completely eliminated.

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Jason Eisner. 1996-06-02. Efficient Normal-Form Parsing for Combinatory Categorial Grammar. https://arxiv.org/abs/cmp-lg/9605038

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