phrase structure grammar

基本解释

This paper illustrates the formalization model employed in Head-driven Phrase Structure Grammar.
简要评述了中心语驱动短语结构语法所采用的语言理论形式化方法。
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.
为了实现有效的文法解析，定义了一种生成规则受限的短语结构文法，称为无重叠生成文法。
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.
该算法的主要思想是从词汇化树库中归纳出三种类型的词汇化树，然后利用了中心词驱动短语结构文法的方法从语料库自动提取结构合理的词汇化树；

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