SiteIF is a personal agent for a news web site that learns user's interests from the requested pages that are analyzed to generate or to update a model of the user. Exploiting this model, the system anticipates which documents in the web site could be interesting for the user. using MultiWordnet, a multilingual extension of Wordnet,a content-based user model is built as a semantic network whose nodes, independent from the language, represent the word sense frequency rather then word frequenc