About epistemic negation and world views in Epistemic Logic Programs
This work addresses foundational issues in knowledge representation for AI, but appears incremental as it builds on existing semantics.
The paper tackles the problem of characterizing and querying world views in Epistemic Logic Programs, which extend Answer Set Programming with epistemic operators and negation, by proposing a new characterization and query methods.
In this paper we consider Epistemic Logic Programs, which extend Answer Set Programming (ASP) with "epistemic operators" and "epistemic negation", and a recent approach to the semantics of such programs in terms of World Views. We propose some observations on the existence and number of world views. We show how to exploit an extended ASP semantics in order to: (i) provide a characterization of world views, different from existing ones; (ii) query world views and query the whole set of world views.