[1] IANA — Repository of IDN Practices ( ( 版)) <http://www.iana.org/domains/idn-tables/>
[2] IANA — IDN Repository Procedures ( ( 版)) <http://www.iana.org/procedures/idn-repository.html>
[3] RFC 5894 - Internationalized Domain Names for Applications (IDNA): Background, Explanation, and Rationale ( ( 版)) <http://tools.ietf.org/html/rfc5894#section-10.3>