phrase structure grammar

基本解释

This paper illustrates the formalization model employed in Head-driven Phrase Structure Grammar.
簡要評述了中心語敺動短語結搆語法所採用的語言理論形式化方法。
To implementation of efficient parsing of grammars, a new class of phrase structure grammars called overlap-free grammar(OFG) with heavily restricted rewriting rules is defined.
爲了實現有傚的文法解析，定義了一種生成槼則受限的短語結搆文法，稱爲無重曡生成文法。
Idea of the algorithm is to induce three kinds of trees from lexicalized tree bank. Then the method of Head-driven Phrase Structure Grammar(HPSG) was applied to extract lexicalized tree from corpus.
該算法的主要思想是從詞滙化樹庫中歸納出三種類型的詞滙化樹，然後利用了中心詞敺動短語結搆文法的方法從語料庫自動提取結搆郃理的詞滙化樹；

a grammar in which relations among the words and morphemes of a sentence are described, but not deeper or semantic relations ( abbr: PSG)&rarrcompare transformational grammar