Explaining Qualitative Preference Models

We propose an explanation facility for a qualitative preference representation framework. We show how an explanation can be provided for qualitative, multi-criteria preferences based on the criteria that are used to decide preferences between outcomes. Such a facility provides an important tool for a user to understand how preferences are determined. We show that this facility can also be used by a user to inform the system about its preferences. Such a user-provided explanation can be used for updating and improving a preference model maintained by the system.