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Most probabilistic extensions of description logics focus on the terminological apparatus. While some allow for expressing probabilistic knowledge about concept assertions, systems which can express probabilistic knowledge about role assertions have received very little attention as yet. We present a system PALC which allows us to express degrees of belief in concept and role assertions for individuals. We introduce syntax and semantics for PALC and we define the corresponding reasoningdblp:conf/dlog/DurigS05 fatcat:5vgvccuw35gavengligt2rkruy