... in the pork, the misspelling of pork can only be detected using semantic information. This paper describes the automatic correction of ill-formed sentences by using integrated information ... is the minimum number of preterminals necessary to produce the rule's LHS category. For example, the MEL of S is 2, because of examples like "I go". Using the penalty scores, ... arise from replacement of a word by a known or unknown word, addition of a known or unknown word, or deletion of a word. Real- word replacement errors may occur because of simple misspellings,...