This volume contains the Proceedings of the Nineteenth JURIX Conference on Legal Knowledge and Information Systems (JURIX 2006), December 7th–9th, Université Pantheon Assas – Paris II, France. This year we hoped to put two new topics on the agenda: Artificial Intelligence in police and intelligence services and the impact of AI on law, legal procedures and legal institutions. Despite the political attention paid to international crime, the war on terrorism and the concerns about the growing number of regulations, increase of administrative costs and overloading of courts, too few contributions about these issues were submitted. Nevertheless, the large number of submissions shows that our interdisciplinary community is still growing and active.
This volume again covers a broad range of topics. Argumentation is central to legal reasoning and therefore it is no surprise that researchers have focused on computational theories of argumentation. In this book four papers are dedicated to this topic. Atkinson & Bench-Capon compare disputes as dialectical trees to other abstract systems for argument representation. Bex et al. focus on causal-abductive reasoning and default-style argumentation to deal with stories, evidence and generalisations in the legal domain. Prakken & Sartor study formal models of representation of presumptions and their effects on the burden of proof. Chorley & Bench-Capon add the possibility of State interventions to improve the outcome of previous research on an argument scheme for practical reasoning.