]> Rei Action Ontology A Rei Action All actions within the policy domain Resources on which the action operates State of the environment before the action can be performed Assertions made after the action is performed All speech acts modeled within Rei receiver of speech act content of speech act If valid, causes a right to be added If valid, causes a prohibition to be added Can request a right or an action. If accepted, leads to either an obligation on the requester or a delegation. If valid, causes the last request to be nullified If valid, causes an obligation on the receiver If valid, causes an obligation on the sender