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Categorial Grammar

Keywords: Combinatory Categorial Grammar

Categories: Natural Language


Author(s): John Beavan

A grammatical formalism, first developed by Adjukiewicz, and later resurrected by Bar-Hillel, Steedman and others, in which grammatical syntactic categories (such as nouns, adjectives) are regarded as functors over certain arguments. Unlike in phrase structure grammars, most of the combinatory properties of the words are encoded in the lexical entries, and the grammar then has a small number of rules. The main one is function application which puts a functor and its argument together, but others, such as type-raising, and function composition may also be used. One of its variants is combinatory categorial grammar (CCG), which attempts to relate the grammar rules to Curry's combinatory logic.


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