Relating Abstract and Structured Accounts of Argumentation Dynamics: the Case of Expansions.

This paper proposes a structured variant in ASPIC + of the notion of expansions of abstract argumentation frameworks. The purpose of this is threefold: studying what it takes to instantiate the abstract notion of expansions with a structured account of argumentation, studying to which extent assumptions implicitly made at the abstract level hold for structured instantiations and studying which potentially interesting distinctions can be made at the structured level that cannot be expressed at the abstract level.