Automatic phrase indexing for document retrieval
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This article presents two new approaches for term indexing which are particularly appropriate for languages with a rich lexis and morphology, such as Spanish, and need few resources to be applied. At word level, productive derivational morphology is used to conflate semantically related words. At sentence level, an approximate grammar is used to conflate syntactic and morphosyntactic variants of a given multiword term into a common base form. Experimental results show remarkable improvements with regard to classical indexing methods.