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Update: Extension Public Comments on Draft Final Report on Policy Aspects Regarding Introduction of Single Character IDN TLDs

Updated 5 December 2010

The joint ccNSO and GNSO IDN working group (JIG) announces the extension of the public comment period on its Draft Final Report until 12 January 2011.

The joint ccNSO and GNSO IDN working group (JIG) is pleased to announce the publication of its Draft Final Report [PDF, 257 KB] on the policy aspects of introducing Single Character IDN TLDs.

The JIG solicits input from the community on its recommendations regarding the implementation of Single Character IDN TLDs

  1. Single Character IDN TLDs should be acceptable under the IDN ccTLD Fast Track Process and underthe overall policy in IDN ccPDP, taking into account the findings from this report.
  2. The GNSO policy recommendation in the Final Report for the Introduction of New Generic Top-Level Domains for Single Character IDN TLDs should be implemented.
  3. The definition of an "extended grapheme cluster" from section 3 of Unicode Standard Annex #29, should be used to define the concept of a "Single Character IDN" TLD / Label / String.
  4. Requested Single Character IDN TLD strings should be analyzed on a case-by-case basis in the new gTLD process depending on the script and language. Single Character IDN TLDs should be acceptable, taking into account the specific requirements as contained in the Draft Final Report.

To be most helpful you are kindly requested to submit your comments by 30 December 2010 Extended to 12 January 2011 at:

An archive of all comments received will be publicly available at:

After closure of the comment period, the working group will finalize its Report taking into account the public comments and input which will be published and submitted to the ccNSO and GNSO Councils for their consideration. During the public comment period the Working Group will continue its work on the other topics identified by the working group.


The ccNSO and GNSO Councils recognized that some topics or issues related to the introduction of IDN TLDs are of common interest to both the GNSO and ccNSO, and therefore preferably addressed in a collaborative effort. The Councils established a joint IDN working group. Its charter can be found at:

To date the JIG identified the following areas of common interest:

  1. Single Character IDN TLDs
  2. IDN TLD Variants
  3. Universal Acceptance of IDN TLDs

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Domain Name System
Internationalized Domain Name ,IDN,"IDNs are domain names that include characters used in the local representation of languages that are not written with the twenty-six letters of the basic Latin alphabet ""a-z"". An IDN can contain Latin letters with diacritical marks, as required by many European languages, or may consist of characters from non-Latin scripts such as Arabic or Chinese. Many languages also use other types of digits than the European ""0-9"". The basic Latin alphabet together with the European-Arabic digits are, for the purpose of domain names, termed ""ASCII characters"" (ASCII = American Standard Code for Information Interchange). These are also included in the broader range of ""Unicode characters"" that provides the basis for IDNs. The ""hostname rule"" requires that all domain names of the type under consideration here are stored in the DNS using only the ASCII characters listed above, with the one further addition of the hyphen ""-"". The Unicode form of an IDN therefore requires special encoding before it is entered into the DNS. The following terminology is used when distinguishing between these forms: A domain name consists of a series of ""labels"" (separated by ""dots""). The ASCII form of an IDN label is termed an ""A-label"". All operations defined in the DNS protocol use A-labels exclusively. The Unicode form, which a user expects to be displayed, is termed a ""U-label"". The difference may be illustrated with the Hindi word for ""test"" — परीका — appearing here as a U-label would (in the Devanagari script). A special form of ""ASCII compatible encoding"" (abbreviated ACE) is applied to this to produce the corresponding A-label: xn--11b5bs1di. A domain name that only includes ASCII letters, digits, and hyphens is termed an ""LDH label"". Although the definitions of A-labels and LDH-labels overlap, a name consisting exclusively of LDH labels, such as"""" is not an IDN."