7.2.4.2 MessageType mapping

The mapping of MessageTypes to UADP NetworkMessage type and the reference to the detailed definition is listed in Table 153.

Table 153 – UADP MessageType mapping
MessageTypeUADP NetworkMessage typeSpecification Reference
DataSetMessageDataSetMessage payloadDefined in 7.2.5.3 and 7.2.5.4.
DataSetMetaDataDiscovery DataSetMetaData announceDefined in 7.2.4.6.4.
ApplicationDescriptionDiscovery Application description announceDefined in 7.2.4.6.5.
ServerEndpointsDiscovery Publisher Endpoints announceDefined in 7.2.4.6.6.
StatusDiscovery status announceDefined in 7.2.4.6.7.
PubSubConnectionDiscovery PubSubConnection configuration announceDefined in 7.2.4.6.8.
ActionRequestAction request messageDefined in 7.2.4.5.9.
ActionResponseAction response messageDefined in 7.2.4.5.10.
ActionMetaDataDiscovery ActionMetaData announceDefined in 7.2.4.6.11.
ActionResponderDiscovery ActionResponder configuration announceDefined in 7.2.4.6.10.

The discovery announce messages are required to send discovery information from the Publishers to the Subcribers. The probe messages are used for broker-less transport protocols like UDP or a Message Oriented Middleware where retained messages are not available.