Phrase structure grammar

Japanese: 句構造文法 - くこうぞうぶんぽう

...Note that some of the terminal theorems generated by this example system are semantically inaccurate, but this is left to semantic analysis.
[phrase structure grammar]
In the alphabet of the previous section, if we consider S as a sentence, N _p and V _p as phrases, A, N, and V as words, and the rest as letters, we can see that by giving different types of symbols in a formal system, we can construct a system that explains the process by which concrete sentences are generated from higher-level concepts. Chomsky's phrase structure grammar, proposed for this purpose, is formally represented as a four-tuple G=(V _N , V _T , P, S). …

From [Natural Language Processing]

… Grammar for natural language processing is relatively new. It started with generative grammar, and then phrase structure grammar, which describes grammar as rewrite rules for grammatical categories such as noun phrases and verbs, developed. Furthermore, since the 1980s, research has progressed on unification grammar, which describes grammar as constraints on how each word is used in a sentence. …

*Some of the terminology explanations that refer to "phrase structure grammar" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…なお，この例のシステムが生成する終端定理には意味上不適切なものがあるが，その検討は意味論にゆだねられる。
【句構造文法phrase structure grammar】
前節の例のアルファベットにおいて，Sを文，N_p，V_pを句，A，N，Vを単語，他を文字という自然言語の概念にそれぞれ対応させてみると，形式システムの記号に，種別の差異を与えることによって，高位概念から具体的な文が生成されるプロセスを説明するためのシステムが構成できることに気づく。この目的で提案されたチョムスキーの句構造文法は，形式的にG=(V_N，V_T，P，S)という4項組で表される。…