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Implementation of Internationalized Top Level Domains

As previously announced, an IDN workshop will be held during the ICANN Vancouver meeting. Accordingly, ICANN previously posted a formal call for papers on the topic of Internationalized Top Level Domains. The timeline for submitting such papers have now expired and ICANN is pleased to post the result.

Whereas several members of the community have requested speaking slots, not all have provided a paper for such speaking slot. The list below should hence not be considered as the list of potential candidates for speaking slots at the workshop, but more so a collection of potential papers and ideas to be presented at the workshop.

By posting these papers ICANN does not endorse their content. The complete list of candidate papers submitted below is indicative of the breadth of ideas to be presented at the workshop. ICANN is appointing a technical panel to review these proposals to determine which are to be presented at the workshop. Following this review an agenda will be posted and the speakers will be contacted directly.

The following papers have been submitted for consideration:

The IDN comment forum for discussions about these various papers will continue to be open throughout the Vancouver meeting:

Click here to submit comments to deployment of Internationalized TLDs

Click here to view comments regarding deployment of Internationalized 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""icann.org"" is not an IDN."