This class is deprecated and will be removed from the Provenance Vocabulary in the next revision. prv:Actor was deprecated in the process of making the Provenance Vocabulary a specialization of W3C's PROV-O. Hence, use one of the more specific classes prv:HumanAgent and prv:NonHumanAgent instead; or, if such a specialization is unsuitable for the use case at hand, directly use the general class prov:Agent as defined by PROV-O.