[dns-wg] DOMAIN attributes review

On Thu, Jul 14, 2011 at 03:47:56PM +0200, Denis Walker wrote:

> With the removal of any hierarchy in reverse delegations and the removal
> of forward domain data there is no longer any use case for the
> "mnt-lower:" attribute.
> 
> Other attributes that are considered to be used only for forward domains
> are:
> - "refer:"
> - "sub-dom:"
> - "dom-net:"

thanks for getting the ball rolling, Denis.

> Number of each attribute used in reverse delegations or ENUMs and the
> number of unique maintainers who manage these objects.
> 
> "refer:"     = 6     unique maintainers = 1

all these objects share the same target that i currently cannot connect to
(port 43 or otherwise).  Also I do not believe this makes much sense for
the reverse space.  It could be intersting for ENUM, though, but then for
similar reasons as in the forward case (ACL maintenance and the likes)
it is probably practically useless. (maybe repost the first message
to the ENUM list ...)

> "sub-dom:"   = 271   unique maintainers = 23
> "dom-net:"   = 2219  unique maintainers = 140

dom-net seems to list the exact address space that corresponds to the
IN-ADDR.ARPA subdomain in question, so that appears rather redundant.

sub-dom is almost always used in a way inconsistent with the syntax
description (which requires non-FQDNs) and most uses seem to be
enumerations of sibling domains rather than subdomains. For ENUM,
the choice of available subdomains is even more limited, so i doubt
it's useful there, either.

> "mnt-lower:" = 46485 unique maintainers = 4208

With the lack of ability to register subdomains in the reverse tree
this might be obsolete. The relative popularity might suggest kind
of an awareness campaign, though.  For ENUM, I'm not sure whether this is
still necesary as a protective measure.  In any case, centrally changing
the Tier1 objects will take some extra effort.

-Peter (no hats)