[1] RFC 3743 - Joint Engineering Team (JET) Guidelines for Internationalized Domain Names (IDN) Registration and Administration for Chinese, Japanese, and Korean ( (2011-03-13 22:40:11 +09:00 版)) <http://tools.ietf.org/html/rfc3743>

[2] RFC 4290 - Suggested Practices for Registration of Internationalized Domain Names (IDN) ( (2011-03-13 11:22:05 +09:00 版)) <http://tools.ietf.org/html/rfc4290>