RFC 3743 (rfc3743) - Page 2 of 33
Joint Engineering Team (JET) Guidelines for Internationalized Domain Names (IDN) Registration and Administration for Chinese, Japanese, and Korean
Alternative Format: Original Text Document
RFC 3743 JET Guidelines for IDN April 2004
The IETF Standards for Internationalized Domain Names, known as
"IDNA", focuses on access to domain names in a range of scripts that
is broader in scope than the original ASCII. The development process
made it clear that use of characters with similar appearances and/or
interpretations created potential for confusion, as well as
difficulties in deployment and transition. The conclusion was that,
while those issues were important, they could best be addressed
administratively rather than through restrictions embedded in the
protocols. This document defines a set of guidelines for applying
restrictions of that type for Chinese, Japanese and Korean (CJK)
scripts and the zones that use them and, perhaps, the beginning of a
framework for thinking about other zones, languages, and scripts.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Definitions, Context, and Notation . . . . . . . . . . . . . . 5
2.1. Definitions and Context. . . . . . . . . . . . . . . . . 5
2.2. Notation for Ideographs and Other Non-ASCII CJK
Characters . . . . . . . . . . . . . . . . . . . . . . . 9
3. Scope of the Administrative Guidelines . . . . . . . . . . . . 9
3.1. Principles Underlying These Guidelines . . . . . . . . . 10
3.2. Registration of IDL. . . . . . . . . . . . . . . . . . . 13
3.2.1. Using the Language Variant Table . . . . . . . . 13
3.2.2. IDL Package. . . . . . . . . . . . . . . . . . . 14
3.2.3. Procedure for Registering IDLs . . . . . . . . . 14
3.3. Deletion and Transfer of IDL and IDL Package . . . . . . 19
3.4. Activation and Deactivation of IDL Variants . . . . . . 19
3.4.1. Activation Algorithm . . . . . . . . . . . . . . 19
3.4.2. Deactivation Algorithm . . . . . . . . . . . . . 20
3.5. Managing Changes in Language Associations. . . . . . . . 21
3.6. Managing Changes to Language Variant Tables. . . . . . . 21
4. Examples of Guideline Use in Zones . . . . . . . . . . . . . . 21
5. Syntax Description for the Language Variant Table. . . . . . . 25
5.1. ABNF Syntax. . . . . . . . . . . . . . . . . . . . . . . 25
5.2. Comments and Explanation of Syntax . . . . . . . . . . . 25
6. Security Considerations. . . . . . . . . . . . . . . . . . . . 27
7. Index to Terminology . . . . . . . . . . . . . . . . . . . . . 27
8. Acknowledgments. . . . . . . . . . . . . . . . . . . . . . . . 28
9. References . . . . . . . . . . . . . . . . . . . . . . . . . . 29
9.1. Normative References . . . . . . . . . . . . . . . . . . 29
9.2. Informative References . . . . . . . . . . . . . . . . . 30
10. Contributors . . . . . . . . . . . . . . . . . . . . . . . . . 30
10.1. Authors' Addresses . . . . . . . . . . . . . . . . . . . 31
10.2. Editors' Addresses . . . . . . . . . . . . . . . . . . . 32
11. Full Copyright Statement . . . . . . . . . . . . . . . . . . . 33
Konishi, et al. Informational