From the draft:

> ...network A, B and ... are AIP networks; Domain node "www.yahoo.com" in network B is expressed as "www.yahoo.com.B" for its external domain name.

It mean that www.yahoo.com can co-exist in AIPs A and B. The "external domain names" will be www.yahoo.com.A abd www.yahoo.com.B. Would HTML documents be linked using local names or external names? Local only names are not going to work across APIs unless www.yahoo.com maintains same document hierarchy in all of them!