  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.
