capable of capable of material entity contribution Agent Agents typically persons, organizations, or software that perform tasks, including making assertions, or generating information used as evidence. In the execution of such tasks, an 'agent role' is realized that inheres in the agent. An agent is something that bears some form of responsibility for an activity taking place, for the existence of an entity, or for another agent's activity. prov:Agent is considered equivalent to foaf:Agent (http://xmlns.com/foaf/0.1/Agent ) Def = "The Agent class is the class of agents; things that do stuff. A well known sub-class is Person, representing people. Other kinds of agents include Organization and Group."