tailieunhanh - Báo cáo khoa học: "A GENERATIVE GRAMMAR APPROACH FOR THE MORPHOLOGIC AND MORPHOSYNTACTIC ANALYSIS OF ITALIAN"

A morphologic and morphosyntactic analyzer for the Italian language has been implemented in VM/Prolog 131 at the IBM Romc Scientific Center as part of a project on text understanding. Aim of this project is the development of a prototype which analyzes short narrative texts (press agency news) and gives a formal representation of their "meaning" as a set of first order logic expressions. Question answering features are also provided. The morphologic analyzer processes every word by means of a context free grammar, in order to obtain its morphologic and syntactic characteristics. . | A GENERATIVE GRAMMAR APPROACH FOR THE MORPHOLOGIC AND MORPHOSYNTACTIC ANALYSIS OF ITALIAN Marina Russo IBM Rome Scientific Center via del Giorgione 129 00147 Rome Italy ABSTRACT A morphologic and morphosyntactic analyzer for the Italian language has been implemented in VM Prolog 3 at the IBM Rome Scientific Center as part of a project on text understanding. Aim of this project is the development of a prototype which analyzes short narrative texts press agency news and gives a formal representation of their meaning as a set of first order logic expressions. Question answering features are also provided. The morphologic analyzer processes every word by means of a context free grammar in order to obtain its morphologic and syntactic characteristics. It also performs a morphosyntactic analysis to recognize fixed and variable sequences of words such as idioms date expressions compound tenses of verbs and comparative and superlative forms of adjectives. The lexicon is stored in a relational data base under the control of SQL DS 2 while the endings of the grammar are stored in the workspace as Prolog facts. A friendly interface written in GDDM 1 allows the user to introduce on line the missing lemmata in order to directly update the dictionary. Introduction About thirty years ago the development of decripting tccniqucs made computer scientists be involved for the first time in the field of Linguistics especially in automatic translation matters. The failure of most of these projects contributed to a general sensibilization towards natural language problems and gave rise to a variety of formal theories for theứ treatment. In the last few years one of the main research objectives became the design of systems able to acquire knowledge directly from texts using natural language as an interface between man and machine. At the IBM Rome Scientific Center a system has been developed for processing Italian texts. The task of the system is to analyze short narrative texts press .