Analysis of Japanese Sentences by Using Semantic and Contextual Information (I)-Semantic Analysis

概要

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We have constructed a powerful parser of Japanese sentences. This paper can resolve ambiguities of input sentences by utilizing various kinds of semantic relationships among words. Especially the 'case' concept introduced by C.J. Fillmore, plays an important role in this parser. Case is the relation which is established between an object and an event. In a sentence, an object is usually expressed by a noun phrase and event by a verb. The information as to what kinds of cases should be described and what kinds of nouns should be selected as case-elements of a verb of a sentence is called 'case-fram ' of the verb and is described in the verb dictionary. A verb may have more than one case frame corresponding to different usages of the verb. A noun represents a set of objects which has certain same properties. We express properties by attribute-value pairs in the noun dictionary. The dictionary also contains the set-inclusion relationships among nouns. In this paper, we will explain how the parser utilizes these dictionaries in order to analyze a noun phrase and a simple sentence.
一般社団法人情報処理学会の論文