An Information Retrieval System with Cooperative Behavior

In this paper we will present a system that is able to perform cooperative information retrieval actions over a text knowledge base. The knowledge base is composed by four levels: Interaction, Domain, Information Retrieval and Text. The interaction level is responsible for the dialogue management, including the inference of attitudes. The domain level is composed by rules encoding knowledge about the text domain. The information retrieval level includes knowledge about IR actions over sets of documents. The text level has knowledge about the words in each text. Cooperation is achieved through two main strategies: 1) clustering the answer sets of documents accordingly with the domain and IR-level knowledge; 2) keeping the context of the interaction and inferring the user intentions.