IAB Statement on Identifiers and Unicode 7.0.0

John C Klensin klensin at jck.com
Thu Jan 29 00:28:42 CET 2015

--On Wednesday, January 28, 2015 13:51 -0800 Markus Scherer
<markus.icu at gmail.com> wrote:

> If you want pure and unambiguous identifiers for web sites, use
> dotted-decimal IP addresses or its IPv6 equivalent
> <http://en.wikipedia.org/wiki/IPv6_address#Recommended_represe
> ntation_as_text> .


(1) This is not primarily about web sites or web site
identification, for reasons that several people have given,
sometimes repeatedly.

(2) If one really did want pure and unambiguous identification
for web sites, IP addresses are not adequate for a series of
reasons, one of the most important of which involves servers
support multiple sites on the same interface, typically by use
of the HTTP "Host" verb.

Please, folks, at least some of us think there is a real problem
here.  If you don't, you are free to disagree, but at least try
to understand the various notes that have explained that problem
and take it, and us, seriously to have a real discussion about
either why it isn't a problem or why it is fundamentally


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