The action-response Topic has the form:

<Prefix>/<Encoding>/action-response/<Responder>/<WriterGroup>

The <Responder> Topic level is the PublisherId for the Responder of the Actions.

The <WriterGroup> Topic level is the name of a WriterGroup.

The action-response Topic level is the default if the ResponseAddress is not provided in the ActionRequest.

The messages are instances of the ActionResponse MessageType (see 7.2.2).

The corresponding Responder message is sent to the Topic with the same <Prefix>, <Encoding> and <Responder>. The PubSubConnection specifies the WriterGroups and DataSetWriters for a Responder.