Vienna.
The next session at EDEM 2009 starts with Dan Cartwright, whose interest is in argumentation processes in e-democracy projects. Decision-making through public consultation is a key part of e-democracy, of course, and there are various systems to engage citizens in such processes online; many of these are limited in their effectiveness, however.
One such approach are e-petitions, as introduced for example in the UK; typically, sites allow users to create and 'sign' e-petitions, but this provides no information on which part of the petition a particular signatory may agree with if multiple justifications for the petition are provided. One way to overcome this problem is the implementation of argument visualisation sytems such as Araucaria and decision support systems such as Zeno, which convert textual argument into a visual representation of the argument logic; however, these are difficult to use for the lay user.