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Proposals for Root Zone Label Generation Ruleset

The Label Generation Ruleset for the Root Zone is the result of integration of Label Generation Rules (LGR) proposals for different scripts or writing systems, which have been developed by relevant Generation Panels and are successfully evaluated by the Integration Panel.

The LGR proposals for the Root Zone, which have been submitted for evaluation, are listed in the table below, along with the proposal documents and their current status.

Final Submission Date Script or Writing System Final Submitted Version for Evaluation Current Status
17 October 2017 Cyrillic Proposal [XML, 19 KB]
Supporting Document [PDF, 1.2 MB]
Test Labels [TXT, 7 KB]		 Released for public comment.
25 May 2017 Thai Proposal [XML, 15 KB]
Supporting Document [PDF, 1 MB]
Test Labels [TXT, 117 KB]		 Integrated into RZ-LGR-2.
View public comment materials.
17 May 2017 Ethiopic Proposal [XML, 31 KB]
Supporting Document [PDF, 2.01 MB]
Test Labels [TXT, 2 KB]		 Integrated into RZ-LGR-2.
View public comment materials.
31 January 2017 Lao Proposal [XML, 16 KB]
Supporting Document [PDF, 2.2 MB]
Test Labels [TXT, 4 KB]		 Integrated into RZ-LGR-2.
View public comment materials.
24 November 2016 Georgian Proposal [XML, 5 KB]
Supporting Document [PDF, 474 KB]
Test Labels [TXT, 2 KB]		 Integrated into RZ-LGR-2.
View public comment materials.
15 August 2016 Khmer Proposal [XML, 20 KB]
Supporting Document [PDF, 3.26 MB]
Test Labels [TXT, 9 KB]		 Integrated into RZ-LGR-2.
View public comment materials.
18 November 2015 Arabic Proposal [XML, 31 KB]
Supporting Document [PDF, 3.47 MB]
Test Labels [TXT, 7 KB]		 Integrated into RZ-LGR-1.
View public comment materials.
5 November 2015 Armenian Proposal [XML, 9 KB]
Supporting Document [PDF, 1.04 MB]
Test Labels [TXT, 1 KB]		 Deferred for integration until LGRs for related scripts are submitted.
View public comment materials.

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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."