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TLG Review – Final Report

Open: 10 December 2010
Closed: 24 January 2011

Explanation/Background: ICANN continues its work to conduct bylaw mandated organizational reviews to provide for continual improvement in its technical coordination and policy development support roles.

In August 2010, ICANN appointed JAS Communications LLC to carry out an independent, external review of ICANN's Technical Liaison Group (TLG).

JAS Communications LLC delivered their draft report [PDF, 286 KB] with recommendations and conclusions based on their independent research and interviews conducted. The draft report was received by the ICANN Board's Structural Improvements Committee (SIC) and released for consultation and public comment on 23 October 2010. Comments received were taken into account by the independent external reviewers and incorporated into JAS Communications LLC's final report.

The independent external reviewers now issue their final report [PDF, 452 KB] for public comment. The community is invited to participate in this comment forum by 24 January 2010 and to provide input on the final report via The final report shall then be considered by the SIC and subsequently submitted to the ICANN Board for consideration.

[PDF, 337 KB] العربية Français [PDF, 391 KB] Español [PDF, 469 KB] Русский [PDF, 537 KB] 中文 [PDF, 547 KB]

For additional information, please refer to the TLG Review web page.

Staff member responsible: Olof Nordling

Announcement | Comments | Summary/analysis of comments

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."