Naslov
Weather Forecast Data Semantic Analysis in F-Logic

Autori
Meštrović, Ana ; Martinčić-Ipšić, Sanda ; Čubrilo Mirko

Izvornik
Journal of information and organizational sciences (1846-3312) 31 (2007), 1; 115-129

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Semantic Analysis; F-logic; Lattice; Knowledge Representation; Dialog Management System; Spoken Dialog System

Sažetak
This paper addresses the semantic analysis problem in a spoken dialog system developed for the domain of weather forecasts. The main goal of semantic analysis is to extract the meaning from the spoken utterances and to transform it into a domain database format. In this work a semantic database for the domain of weather forecasts is represented using the F-logic formalism. Semantic knowledge is captured through semantic categories in a semantic dictionary using phrases and output templates. Procedures for semantic analysis of Croatian weather data combine parsing techniques for Croatian language and a slot filling approach. Semantic analysis is conducted in three phases. In the first phase the main semantic category for the input utterance is determined. The lattices are used for hierarchical semantic relation representation and main category derivation. In the second phase semantic units are analyzed and knowledge slots in the database are filled. Since some slot values of input data are missing in the third phase, incomplete data is updated with missing values. All rules for semantic analysis are defined in the F-logic and implemented using the FLORA-2 system. The results of semantic analysis evaluation in terms of frame and slot error rates are presented.

Izvorni jezik
Engleski

Znanstvena područja
Informacijske i komunikacijske znanosti

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