[DNSOP] Re: Last Call: <draft-ietf-dnsop-zoneversion-09.txt> (The DNS Zone Version (ZONEVERSION) Option) to Informational RFC

[Joe Abley <[e-mail]>]

Hey,

On 4 Jul 2024, at 09:15, Petr Špaček <[e-mail]> wrote:

> To be clear:
> Let's not hang too tight on this particular example. It could be something crazy like
> 
> qname.zone1.test. CNAME target2.example.
> target2.example. CNAME final.example.net.
> final.example.net. A 192.0.2.1
> 
> (i.e. zone names have nothing in common except for the root)

Yep. I still think the language you quoted would benefit from some clarification though. Perhaps:

1.2. Terminology

ADD:

In this document, an "enclosing zone" of a domain name means a zone in which the domain name is present as an owner name, or any parent of that zone. For example, if B.C.EXAMPLE and EXAMPLE are zones, but C.EXAMPLE is not, the domain name A.B.C.EXAMPLE would have the enclosing zones B.C.EXAMPLE, EXAMPLE and the root zone.

3.2 Responders

OLD:

   A name server that (a) understands the ZONEVERSION option, (b)
   receives a query with the ZONEVERSION option, (c) is authoritative
   for the zone of the original QNAME, and (d) chooses to honor a
   particular ZONEVERSION request responds by including a TYPE and
   corresponding VERSION value in a ZONEVERSION option in an EDNS(0) OPT
   pseudo-RR in the response message.

NEW:

   A name server that (a) understands the ZONEVERSION option, (b)
   receives a query with the ZONEVERSION option, (c) is authoritative
   for one or more enclosing zones of the original QNAME, and (d) chooses to honor a
   particular ZONEVERSION request responds by including a TYPE and
   corresponding VERSION value in one or more ZONEVERSION options in an EDNS(0) OPT
   pseudo-RR in the response message.

OLD:

   A name server MAY include more than one ZONEVERSION option in the
   response if it supports multiple TYPEs.  A name server MAY also
   include more than one ZONEVERSION option in the response if it is
   authoritative for more than one zone of the corresponding QNAME.  A
   name server MUST NOT include more than one ZONEVERSION option for a
   given TYPE and LABELCOUNT.

NEW:

   A name server MAY include more than one ZONEVERSION option in the
   response if it supports multiple TYPEs.  A name server MAY also
   include more than one ZONEVERSION option in the response if it is
   authoritative for more than one enclosing zone of the corresponding QNAME.  A
   name server MUST NOT include more than one ZONEVERSION option for a
   given TYPE and LABELCOUNT.


Joe