Un processus multi-approches pour l'indexation de documents

This article presents an automatic method of indexing documents based on a semantic, linguistic and finally statistics approach. The semantic analysis is based on the annotation of the document to index by using the ontology of water domain’s. The linguistic process and statistics which succeed him are a sequential combination of the linguistic analysis of the document to be indexed by the extraction of the significant terms of the document and the statistical analysis is the decomposition in singular values of words composing the document. Here, weighting terms are set to take advantages of both their position compared to other terms (co-occurrence) and their local and global context. An application was developed in order to suggest assignments topics of documents to a referential. Finally, we will present experiments comparatives results (with or without semantic treatment) and evaluation carried out on documents of Suez-Environnement. MOTS-CLES : ontologie, indexation, linguistique, statistique