An ASPIC-based legal argumentation framework for deontic reasoning

In the last years, argumentation theory has been exploited to reason about
norms, argue about enforced obligations and permissions, and establish the validity
of norms seen as argumentative claims. In this paper, we start from the dynamic
legal argumentation framework recently proposed by Prakken and Sartor, and we
extend their ASPIC-based system by introducing deontic modalities, to include also
normative concepts like factual and deontic detachment, and normative dynamics.
Properties of the original and proposed legal argumentation system are presented
and discussed, and related to deontic logic and logics of normative systems.