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Web forms are massively used as a very effective way for user interaction with information systems. Notwithstanding, filling in forms with personal data can be tedious and repetitive. Due to legal and technical constraints, full interoperability of information systems is not a straightforward solution. So that several client-side techniques have been developed in the last years to automate the task of filling in forms; for example, auto-filling and auto-complete are very well-known techniques that employ contextual information to fill in automatically Web forms. However, the accuracy of these techniques is limited by the contextual information available on the Web browser. Some information systems can record users' personal information on the server side and use them to provide pre-filled forms to returning users. The problem with such as an approach is that users must keep updated records of personal information in …