What address models does xAP support?
The xAP addressing model is a little unusual. The primary mode of addressing is source based addressing. Instead of messages being directed at a specific device, all devices receive all messages and then make their own decision on whether or not that message is relevant to them. This has a number of advantages – perhaps the most significant of which is the promotion of a loosely coupled system. Senders and receivers do not to be explicitly connected on a point-to-point basis, which vastly simplifies configuration and allows new systems to be added on an ad-hoc basis. In some special cases, such as device configuration, it is a requirement to deliver a message to a specific recipient. This is the second mode of xAP addressing, targeted addressing.
