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SUMlMARYThe systematic approach to compilation represented by syntax-directed compilers makes possible a similarly systematic approach to the automatic correction of syntax errors. This paper describes the syntax-directed syntax error correction system EXPL. Techniques for pinpointing the locations of syntax errors, generating sets of possible corrections and for choosing the best correction from such a set are presented. A particularly promising approach involves the use of semantic information to assist in the elimination of inappropriate syntactic corrections.

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