From CLIR to CLIE: some lessons in NTCIR evaluation

Abstract

Cross-language information retrieval (CLIR) facilitates the use of one language to access documents in other languages. Cross-language information extraction (CLIE) extracts relevant information in finer granularity from multilingual documents for some specific applications like summarization, question answering, opinion extraction, etc. This paper reviews CLIR, CLQA, and opinion analysis tasks in NTCIR evaluation. The design methodologies and some key technologies are reported.