= DNS/RFC/8499/glue =

定義というより、誤用を容認した記述にすぎない。-- ToshinoriMaeno <<DateTime(2019-12-17T17:58:22+0900)>>
  
要約: glueが指すものは周りの状況次第だ。

  毒を入れるのが簡単なもの、毒の被害が甚大なものをglueと呼ぶのはやめよ。-- ToshinoriMaeno <<DateTime(2019-12-17T17:27:15+0900)>>

8499でglueと認めているもの以外にもglueと呼ばれているものがある。あった。
 それらを含めて、どういうものがglueと呼ばれている(いた)かを、整理する必要があるだろう。-- ToshinoriMaeno <<DateTime(2019-12-23T23:45:45+0900)>>

----
== 拡大解釈 ==

Glue records:  "...[Resource records] which are not part of the
      authoritative data [of the zone], and are address RRs for the
      [name] servers [in subzones].  

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."  

Without glue "we could be faced with the
      situation where the NS RRs tell us that in order to learn a name
      server's address, we should contact the server using the address
      we wish to learn."  (Quoted from [RFC1034], Section 4.2.1)

A later definition is that glue "includes any record in a zone file that 
  is not properly part of that zone, including nameserver records of delegated sub-zones (NS records),
  address records that accompany those NS records (A, AAAA, etc),
  and any other stray data that might appear."  (Quoted from [RFC2181], Section 5.4.1)

定義というより、誤用を容認した記述にすぎない。-- ToshinoriMaeno <<DateTime(2019-12-17T17:58:22+0900)>>

----
Although glue is sometimes used today with this wider definition in mind,
  the context surrounding the definition in [RFC2181]
  suggests it is intended to apply to the use of glue within the
  document itself and not necessarily beyond.

誤用が増えたのなら、glueを捨てて、別の用語を提案するのがよいだろう。-- ToshinoriMaeno <<DateTime(2019-12-17T17:59:37+0900)>>