Message sent from Device to RI to establish an RI context. association. Message sent from RI to Device in response to a deviceHello message. Message sent from Device to RI to request registration. Message sent from RI to Device in response to a registrationRequest message. Message sent from Device to RI to identify the Device. Message sent from RI to Device in response to an IdentificationRequest message. Message sent from Device to RI to request an RO. Message sent from RI to Device in response to a roRequest message. Message sent from Device to RI to communicate RO installation status. Message sent from RI to Device in response to a roConfirmRequest message. General PDU for sending Domain-related requests from a Device to an RI. Message sent from RI to Device in response to a joinDomainRequest message. Message sent from RI to Device in response to a leaveDomainRequest message. Message sent from Device to RI to submit a metering Report. Message sent from RI to Device in response to a meteringReportSubmit message. Message sent from Device to RI to upload ROs. Message sent from RI to Device in response to a ROUploadRequest. Message used to trigger the Device to initiate a Rights Object Acquisition Protocol.