phrase-structure grammar
phrase-structure grammar (PSG) A grammar that contains rules which are capable of both generating strings of linguistic elements and providing a constituent analysis of the strings. In their original form, phrase-structure grammars took the form of a set of rewrite rules, for example S → NP + VP
(which reads rewrite S as NP (noun phrase) + VP (verb phrase)). Various distinctions have been made between different classes of phrase-structure grammar, primarily between context-sensitive and context-free grammars.
(which reads rewrite S as NP (noun phrase) + VP (verb phrase)). Various distinctions have been made between different classes of phrase-structure grammar, primarily between context-sensitive and context-free grammars.
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phrase-structure grammar