The development of the web has seen the explosion of web forms as a mean for the user to provide information to web applications in the context of both personal and professional activities. Currently, user personal data are stored and managed at companies’ side. That makes the user dependent on the corresponding services while granting her a very passive role. We aim to demonstrate that if correctly modeled, user traces provide many benefits for both the user and services. In this paper, we propose a trace model including a new web form qualification model and a user-friendly solution that improves web users productivity by providing semantics-based tools. One of our goals is to provide trace analysis methods that enable answering questions like : "Where have I read something about Inforsid on the web?"