선형구구조문법의 한국어 분석

Abstract

In thís paper we examined how the famework of Linear Phrase Structure Grammar(LPSG) works wíth Korean, one of the typical free-word-oder languages. We propose Immediate Dominance (ID) rules and Linear Precedence (LP) statements folIowing the conventìon of GPSG. We adopt the concept of maximal category to improve the efficiency of syntactic operation. Any noun phrase can be maximal when it is given a postposition of case. Only an NP with case provided by a postposition can expect a constituent and undergo syntactic and semantic composition. Six basic sentence structures with and without modifiers are examined in the LPSG framework. We find that the concept of maximal category is necessary to exclude ungrammatical word order by blocking any word or phrase from getting into the boundary of a maximal category. In other words free-word-order is allowed only among the maximal categories. It also enhances the efficiency of parsing because we may not expect unnecessary categories from non-maximal categories. Because of this result we are obliged to accept the loose instead of strict linearity of syntactic and semantic composition. The attempt to parse Korean sentences strictly from left to right will result in inefficient parsing. And we can assume that the grammar without the concept of maximal category in free-word-order language would lack explanatory power