RÉGAL, un système pour la visualisation sélective de documents

Information retrieval systems generally return a list of ranked documents, such as only the title and possibly a snippet that contains the words of the request allow a user to evaluate the document relevance relative to her initial request. This kind of result leads the user to browse a lot of documents before satisfying her information need. In order to improve information retrieval, we have studied text visualization: which information has to be shown and how? Our system RÉGAL (RÉsumé Guidé par les Attentes du Lecteur), automatically extracts the visualized information from texts by applying a thematic analysis that does not require a pre-existing structuring or a formatting of the texts, and is based on the combination of two criteria: lexical cohesion and cue phrases. MOTS-CLÉS : visualisation de texte, navigation textuelle, résumé dynamique, analyse thématique.