RFC Errata
RFC 3490, "Internationalizing Domain Names in Applications (IDNA)", March 2003
Note: This RFC has been obsoleted by RFC 5890, RFC 5891
Source of RFC: idn (int)See Also: RFC 3490 w/ inline errata
Errata ID: 266
Status: Verified
Type: Technical
Publication Format(s) : TEXT
Reported By: Adam Costello
Date Reported: 2003-04-28
Section 4.2 says:
The ToUnicode output never contains more code points than its input. This is not true; I have constructed a counterexample.
It should say:
The Punycode decoder can never output more code points than it inputs, but Nameprep can, and therefore ToUnicode can.