Rewrite_rule

For the use of "rewrite rules" in web servers, see rewrite engine.

A rewrite rule (phrase-structure rule or production) in generative grammar is a rule of the form A → X where A is a syntactic category label, such as noun phrase or sentence, and X is a sequence of such labels and/or morphemes, expressing the fact that A can be replaced by X in generating the constituent structure of a sentence.

See also

• Formal grammar
• Generative grammar
• Production (computer science)
• Transformational grammar

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