Translation Techniques in Cross-Language Information Retrieval

Cross-language information retrieval (CLIR) is an active sub-domain of information retrieval (IR). Like IR, CLIR is centred upon the search for documents, and for information contained within those documents. Unlike IR, CLIR must reconcile queries and documents which are written in different languages. The usual solution to this mismatch involves translating the query and/or the documents before performing the search. Translation is therefore a pivotal activity for CLIR engines. Over the last 15 years, the CLIR community has developed a wide range of techniques and models supporting free text translation. This paper presents an overview of those techniques, with a special emphasis on recent developments.

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