DataSetMessagesand header to facilitate delivery, routing, security and filtering

Note 1to entry: The Publisherhands off the NetworkMessageto the Message Oriented Middleware(transport layer) to deliver DataSetMessagesto the Subscribers.

Note 2 to entry:The term message is used with various connotations in the messaging world. The Publishermight like to think of the message as an immutable payload handed off to the Message Oriented Middlewarefor delivery. The Subscriberoften thinks of the message as not only that immutable payload from the sender, but also various annotations supplied by the Message Oriented Middlewarealong the way. To avoid confusion the term DataSetMessageis used to mean the message as supplied by the Publisherfor a DataSetand the term NetworkMessageis used to mean the DataSetMessageplus sections for annotation at the head and tail of the DataSetMessage.