Legal representation and reasoning in practice: a critical comparisonLegal representation and reasoning in practice: a critical comparison Κεφάλαιο σε Βιβλίο Book Chapter 2019-10-222018enRepresentation and reasoning over legal rules is an important application domain and a number of related approaches have been developed. In this work, we investigate legal reasoning in practice based on three use cases of increasing complexity. We consider three representation and reasoning approaches: (a) Answer Set Programming, (b) Argumentation and (c) Defeasible Logic. Representation and reasoning approaches are evaluated with respect to semantics, expressiveness, efficiency, complexity and support.http://creativecommons.org/licenses/by/4.0/Frontiers in Artificial Intelligence and ApplicationsLegal Knowledge and Information Systems Batsakis Sotirios Μπατσακης Σωτηριος Baryannis George Governatori, Guido Tachmazidis Ilias Antoniou, Grigoris IOS Press Legal knowledge representation Legal reasoning Normative reasoning