11.1 Non-Global Addresses

11.1 Non-Global Addresses

The format applies to all kinds of unicast and multicast addresses of non-global scope except the unspecified address, which does not have a scope. The format is meaningless and should not be used for global addresses. The loopback address belongs to the trivial link; i.e., the link attached to the loopback interface. Thus the format should not be used for the loopback address, either. This document does not specify the usage of the format when the <address> is the unspecified address, as the address does not have a scope. This document, however, does not prohibit an implementation from using the format for those special addresses for implementation dependent purposes.