[15] [DFN@en[[[IDNA]]]] ([DFN@en[Internationalizing Domain Names in Applications]])
は、 [[IDN]] ([[国際化ドメイン名]]) を[[インターネット]]の様々な[[アプリケーション]]で扱うための技術です。

[17] [[IDNA]] では、既存の[[プロトコル]]や実働しているシステムへの変更無しで [[IDN]]
を扱うために、 [[IDN]] を [[ASCII文字]]に転写し、 [[IDN]] と [[ASCII]] 
の[[ドメイン名]]との変換を末端の[[アプリケーション]]内で行います。この [[ASCII文字]]への転写法としては
[[Punycode]] が採用されています。

* 版

[16] [[IDNA]] には2つの (非互換な) 版があります。

- [13] [[IDNA2003]]
- [14] [[IDNA2008]]

* テスト・ケース

[30] [CITE[Nameprep and IDNA Test Vectors]]
( ([TIME[2011-03-07 08:02:42 +09:00]] 版))
<http://www.gnu.org/software/libidn/draft-josefsson-idn-test-vectors.html>

[31] 
[CITE@en-US[Savannah Git Hosting - libidn.git/tree - tests/]]
<http://git.savannah.gnu.org/gitweb/?p=libidn.git;a=tree;f=tests>

* 実装

[29] [CITE[Net::IDN::Encode - search.cpan.org]]
<http://search.cpan.org/dist/Net-IDN-Encode/lib/Net/IDN/Encode.pm>

* メモ

[12] [CITE@en[RFC 5992 - Internationalized Domain Names Registration and Administration Guidelines for European Languages Using Cyrillic]]
([TIME[2010-10-05 09:48:08 +09:00]] 版)
<http://tools.ietf.org/html/rfc5992>


[32] [CITE[IRC logs: freenode / #whatwg / 20121107]]
( ([TIME[2012-11-25 12:45:34 +09:00]] 版))
<http://krijnhoetmer.nl/irc-logs/whatwg/20121107#l-633>

[33] [CITE[Updating RFC 5890-5893 (IDNA 2008) to Full Standard]]
( ([TIME[2012-11-09 00:27:02 +09:00]] 版))
<http://www.alvestrand.no/pipermail/idna-update/2012-November/007450.html>

[34] [CITE[URL: IDNA2008 — Anne’s Blog]]
( ([TIME[2012-11-29 09:02:36 +09:00]] 版))
<http://annevankesteren.nl/2012/09/idna2008>

[35] [CITE@en[RFC 6912 - Principles for Unicode Code Point Inclusion in Labels in the DNS]]
( ([TIME[2013-07-31 04:26:59 +09:00]] 版))
<http://tools.ietf.org/html/rfc6912>

[36] [CITE[IRC logs: freenode / #whatwg / 20130813]]
( ([TIME[2013-08-14 23:34:42 +09:00]] 版))
<http://krijnhoetmer.nl/irc-logs/whatwg/20130813#l-558>

[37] [CITE[IRC logs: freenode / #whatwg / 20130816]]
( ([TIME[2013-08-17 16:16:01 +09:00]] 版))
<http://krijnhoetmer.nl/irc-logs/whatwg/20130816#l-62>

[38] [CITE[''''''[''''''whatwg'''''']'''''' URL standard: Query string parsing; host parsing]]
( ([TIME[2013-08-19 10:56:48 +09:00]] 版))
<http://lists.whatwg.org/pipermail/whatwg-whatwg.org/2013-August/040504.html>

[39] [CITE[IRC logs: freenode / #whatwg / 20130819]]
( ([TIME[2013-08-20 19:40:50 +09:00]] 版))
<http://krijnhoetmer.nl/irc-logs/whatwg/20130819>

[40] [CITE[URL: IDNA2003 — Anne’s Blog]]
( ([TIME[2013-08-20 19:56:56 +09:00]] 版))
<http://annevankesteren.nl/2013/08/idna2003>

[41] [CITE@en[Re: Standardizing on IDNA 2003 in the URL Standard]]
( ([[Anne van Kesteren]] 著, [TIME[2013-08-20 21:32:23 +09:00]] 版))
<http://lists.w3.org/Archives/Public/www-tag/2013Aug/0085.html>

[42] [CITE[IRC logs: freenode / #whatwg / 20130912]]
( ([TIME[2013-09-15 16:17:53 +09:00]] 版))
<http://krijnhoetmer.nl/irc-logs/whatwg/20130912#l-744>

[43] [CITE[Issue 23642003: Support IDNA 2008 - Code Review]]
( ([TIME[2013-10-01 20:50:21 +09:00]] 版))
<https://codereview.chromium.org/23642003>

[44] [CITE@en[479520 – (IDNA2008) Implement new IDNA2008 standards]]
( ([TIME[2013-10-01 20:50:45 +09:00]] 版))
<https://bugzilla.mozilla.org/show_bug.cgi?id=479520>