Re: [DNSOP] DNS Terminology: Glue

[Paul Hoffman <[e-mail]>]

On Mar 13, 2015, at 8:39 AM, Shumon Huque <[e-mail]> wrote:
> It might be worth also clarifying another thing. The definition states "These
> RRs are only necessary if", but doesn't clearly include or exclude the possibility
> that other address records for NS names that don't sit below the zone cut, and 
> were gratuitously provided in the referral response, qualify to be  called 'glue'. I 
> think  they should not be called glue (they don't meet my intuitive understanding 
> of the meaning of 'glue', as gluing up a hole in the resolution path). But clarity on 
> this point would be welcome.

If there is a well-accepted name for "address records that come with glue records but are not actually glue records", we can add it, but I am hesitant for this document becoming a list of things observed in the wild that don't already have names.

FWIW, what we tentatively have for the next draft is:

   Glue records -- Resource records which are not part of the
   authoritative data [for a zone], and are address resource records for
   the servers [in a subzone].  These RRs are only necessary if the name
   server's name is "below" the cut, and are only used as part of a
   referral response.  (Definition from RFC 1034, section 4.2.1)

--Paul Hoffman