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Cross-language Information Retrieval
Two key assumptions shape the usual view of ranked retrieval: (1) that the
searcher can choose words for their query that might appear in the documents
that they wish to see, and (2) that ranking retrieved documents will suffice
because the searcher will be able to recognize those which they wished to find.
When the documents to be searched are in a language not known by the searcher,
neither assumption is true. In such cases, Cross-Language Information Retrieval
(CLIR) is needed. This chapter reviews the state of the art for CLIR and
outlines some open research questions.Comment: 49 pages, 0 figure