XFN Links

An XFN link is a special form of reference that is bound to an atomic name in a context. Instead of an address, a link contains a composite name. Many naming systems support a native notion of link that can be used within the naming system itself. XFN does not specify whether there is any relationship between such native links and XFN links.

"XFN Links" describes links in detail.

Figure 1-7 Federated Naming System With Composite Names