Document: draft-ietf-enum-infrastructure-07.txt
Reviewer: Elwyn Davies
Review Date: 19 June 2008
IETF LC End Date: 16 June 2008
IESG Telechat date: -

Summary:
This document is almost ready for the IESG.  There are a couple of semi-editorial issues that it would be good to flesh out as noted below and the IANA considerations are incomplete.  It may also require additional statements regarding the IAB's actions on the administration of the new sub-domain of .arpa in line with RFC 3761.

Comments:
1. The structure of the Infrastructure ENUm domain:
The term 'parallel namespace' is used in the Abstract and s3 implicitly importing the mapping of E.164 telephone numbers to URIs as set out in RFC 3761.  I think that to make it quite clear what is going on, it would be worth stating something like:
   Parallel namespaces means that Infrastructure ENUM provides an (additional) Dynamic Delegation Discovery System (DDDS) database which follows the rules set out in Section 2.4 of RFC 3761, except that at stage 4 the string ".[IANA TBD - maybe i164].arpa" is added rather than ".e164.arpa". [This might require a reference to RFC 3403].

2. "Infrastructure ENUM Tier 2 resource records" (s3, para 2):  This terminology is pure PSTN and needs explanation for the RFC audience.

3. A question: RFC 3761 makes comments that only diallable numbers should be presented to the database.. is that equally true for Infrastructure ENUM?    I understand that blocks of numbers owned by a provider might be registered even if they aren't all in use.  Does this require a comment?

4. RFC 3761 takes over the delegation of of e164.arpa, and gives instructions to IANA regarding this delegation.  This document should make similar statements about the new subdomain (e.g. i164.arpa).
 
5. RFC 3761 contains statements about IAB actions relating to the e164.arpa domain.  Presumably similar statements are needed for the new domain.  These need to be agreed with the IAB (I know there has been discussion already). This may be no more that a further enlargement on the 'parallel namespace' clarifcation above.