The greater presence and pervasiveness of ICT in everyday life poses new concerns about personal rights such as non-discrimination and individual privacy. Since these concerns limit the practical applicability and the broad acceptance of advanced technologies, such as decision support systems (DSS) and location-based services (LBS), the diffusion of these applications relies on the existence of technical tools to enforce personal rights. Developing these tools requires a constant reference to what is legal and what is not, in measurable and formal terms.