the usual reason is that there's a disconnect between the domain name and the host or the app.Why isn't a Domain Name sufficient to the purpose you have in mind?That was not a major reason that was cited during the extended period of debate about identifier/locator separation design issues.
Well I certainly brought it up, multiple times, during the NSRG discussions.
But to repeat: Only Stephane knows exactly what he has in mind.
And I'm curious to know that as well. I just don't think we have to confine our discussion here to what Stephane has in mind.