http://www.ontologyrepository.com/CommonCoreOntologies/Mid/EventOntology Excluded from this class are instances of role change or role creation such as the introduction of an artifact as a piece of evidence in a trial or the loading of artifacts onto a ship for transport. Act of Artifact Modification An Act of Artifact Processing in which an existing Artifact is acted upon in a manner that changes, adds, or removes one or more of its Qualities, Dispositions, or Functions.