One of the use cases for PubSub is the publication of data to IT applications through a message queue where one DataSet is related to one message queue.

The IT application does not need to have knowledge about OPC UA but OPC UA specific header may be used for the message processing.

In such a use cases, the messages sent to a message queue can only contain one DataSetMessage but a OPC UA specific header is provided.

The header layout described in this section is optimized for this use case.