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id definite-clause-grammar-notation
name Definite clause grammar
appeared 1980
tags grammarLanguage

example
 sentence --> noun_phrase, verb_phrase.
 noun_phrase --> det, noun.
 verb_phrase --> verb, noun_phrase.
 det --> [the].
 det --> [a].
 noun --> [cat].
 noun --> [bat].
 verb --> [eats].

wikipedia https://en.wikipedia.org/wiki/Definite_clause_grammar