This illustration shows the retailer using the retailer application to send an XML order to the AQ broker, which reformats the XML order and sends it to the supplier application, which is sent to the browser.

The supplier application supplies the XML order back to the AQ broker, which reformats the XML order.

The retailer application communicates with the Retailer Database, the AQ Broker with the Transformer Database, and the Supplier Application with the Supplier Database.