Communications of the ACM

Home/Magazine Archive/January 1974 (Vol. 17, No. 1)/Syntax-directed least-errors analysis for context-free.../Abstract

Syntax-directed least-errors analysis for context-free languages: a practical approach

By Gordon Lyon
Communications of the ACM, January 1974, Vol. 17 No. 1, Pages 3-14
10.1145/360767.360771
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A least-errors recognizer is developed informally using the well-known recognizer of Earley, along with elements of Bellman's dynamic programming. The analyzer takes a general class of context-free grammars as drivers, and any finite string as input. Recognition consists of a least-errors count for a corrected version of the input relative to the driver grammar. The algorithm design emphasizes practical aspects which help in programming it.

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