Abstract
Descriptor revision is a belief change framework that was introduced by Hansson as an alternative to the currently prevailing AGM paradigm. One central idea of descriptor revision is to describe the desired outcome of a belief change. Thus, descriptor revision allows expressing different kinds of belief change operations like revision or contraction in a structured and combined way. In this paper, we investigate the framework of conditional descriptor revision. Conditional descriptor revision is a variation of descriptor revision aimed at the revision of ranking functions in the context of conditional logic. It is obtained by applying descriptor revision to conditional logic and additionally requiring the belief changes to fulfil the principle of conditional preservation. We show how conditional descriptor revision can be characterized by a constraint satisfaction problem (CSP). In contrast to previous work, we cover the full descriptor language over conditionals closed under conjunction, disjunction, and negation. We also line out an implementation of conditional descriptor revision based on its CSP representation. Since propositional logic can be embedded into conditional logic, our approach also provides descriptor revision for propositional logic.
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