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Maximizing Top-down Constraints for Unification-based Systems

Noriko Tomuro
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Abstract

A left-corner parsing algorithm with top-down filtering has been reported to show very efficient performance for unification-based systems. However, due to the nontermination of parsing with left-recursive grammars, top-down constraints must be weakened. In this paper, a general method of maximizing top-down constraints is proposed. The method provides a procedure to dynamically compute *restrictor*, a minimum set of features involved in an infinite loop for every propagation path; thus top-down constraints are maximally propagated.

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Noriko Tomuro. 1996-06-20. Maximizing Top-down Constraints for Unification-based Systems. https://arxiv.org/abs/cmp-lg/9606028

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