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IDN Variant TLD Program – Interim Report Examining the User Experience Implications of Active Variant TLDs

Forum Announcement: Comment Period Opens on Date: 23 October 2012
Categories/Tags: Top-Level Domains, Internationalized Domain Names
Purpose (Brief):

To better understand and address the challenges surrounding the activation of variant internationalized top-level domains (IDNs), this interim report:

1) summarizes and compares, from a user experience and registry management perspective, variant practices in several ccTLD registries,

2) proposes a set of guiding principles to define an acceptable user experience, and

3) identifies how various user communities (e.g., end users, system/network administrators, application developers, registrants, registrars and registries) will be impacted by active variant top-level domains.

The interim report is published for public comment thirty (30) days (plus 21-day reply period) and is to be followed by the final report, to be published with ninety (90) days after the closure of the public comment forum. The final report will incorporate the community input with proposed guidelines and recommendations for active variant TLDs.

Public Comment Box Link:

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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."