A natural language query interface to structured information
ESWC'08 Proceedings of the 5th European semantic web conference on The semantic web: research and applications
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This paper describes an approach to resolve quanti- fiers and number restrictions in natural language ques- tions to query ontologies. Incorporating this feature enables natural language query interfaces to capture a wider range of user queries. To deal with quantifiers and number restrictions, we analyzed a corpus of such questions and derived constraints at the syntactic level to recognize and parse them. The approach was imple- mented and evaluated through a system called ONLI+. Our method has been evaluated by conducting different experiments using the Mean Reciprocal Rank (MRR) measure. Experimental results show that this feature has been incorporated into ONLI+ without degrading its performance in terms of transforming natural lan- guage queries into the nRQL queries, but definitely in- creases the expressivity of the user. To the best of our knowledge no other natural language interface to query ontologies can deal with quantifiers and number restric- tions.