<enormous snip>
The phrase 'non-IETF tree' had a different connotation for me and some IDF
colleagues, i.e. "not arising out of an IETF WG". Indeed, DOI did not go
through an IETF WG: but we brought it to the IETF because we agree that
there should be a central place for URI registration. Larry M. made an
excellent case for putting Engineering in IETF reviews and as noted earlier
we will respond to that. But I'd like to note that if the vnd- scheme (even
if renamed as a recent suggestion) continues (as it looks now) to carry a
connotation of lightweight, second-class citizen status, we feel that
doesn't meet our needs.