Internationalized Domain Name
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... [IDNA] describes an architecture for supporting internationalized
domain names. Labels containing non-ASCII characters can be
represented by ACE ...
... domain label
could map to multiple ACE labels, then an internationalized domain
name could map to multiple ASCII domain names, each controlled by a
...
... Hoffman, P. and M. Blanchet, "Nameprep: A Stringprep Profile for Internationalized Domain Names (IDN)", RFC 3491prop, March 2003. ...