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RSSAC Review – Independent Consultant's Final Report

Open: 25 February 09
Closed: 27 March 09 Extended to 17 April 09

Explanation: The consultants selected to carry out the external review of RSSAC (Westlake Consulting limited) released at the end of February, 2009 their draft final report, presenting their conclusions and recommendations. The public comment period to this document was opened from the 25 February till the 27 march 2009. The 10 March 2009 the consultants presented the finalized version of their report, changing the order of some sections and modifying the wording of some recommendations in order to enhance comprehensibility of the document.

In order to reflect this change, this public comment period refers now to the finalized version of the report [PDF, 2.56 MB];its deadline has been extended to the 17 April 2009.

All comments that have been or will be received and that refer to the draft version of the report will be interpreted in the context of the finalized version of the report.

For more information about the RSSAC review, please see the RSSAC review page.
Staff member responsible: Marco Lorenzoni

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""icann.org"" is not an IDN."