Computing k-rank answers with Ontological CP-Nets.
Tommaso Di Noia, Thomas Lukasiewicz, María Vanina Martínez, Gerardo I. Simari, Oana Tifrea-Marciuska · 2014
Abstract. The tastes of a user can be represented in a natural way by using qual-itative preferences. In this paper, we describe how to combine ontological knowl-edge with CP-nets to represent preferences in a qualitative way and enriched with domain knowledge. Specifically, we focus on conjunctive query (CQ) answering under CP-net-based preferences. We define k-rank answers to CQs based on the user’s preferences encoded in an ontological CP-net and we provide an algorithm for k-rank answering CQs. 1