The issue of representing attacks to attacks in argumentation is receiving an increasing attention as a useful conceptual modelling tool in several contexts. In this paper we present AFRA, a formalism encompassing unlimited recursive attacks within argumentation frameworks. AFRA satisfies the basic requirements of definition simplicity and rigorous compatibility with Dung's theory of argumentation. This paper provides a complete development of the AFRA formalism complemented by illustrative examples and a detailed comparison with other recursive attack formalizations. © 2010 Elsevier Inc. All rights reserved.
Baroni, P., Cerutti, F., Giacomin, M., & Guida, G. (2011). AFRA: Argumentation framework with recursive attacks. In International Journal of Approximate Reasoning (Vol. 52, pp. 19–37). https://doi.org/10.1016/j.ijar.2010.05.004