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Update on Root Zone LGR Generation Panel Formation

ICANN is pleased to announce significant progress in the formation of Generation Panels for Root Zone Label Generation Rules (LGR). Generation Panels are community panels that will establish the rules that define, for a given script, which code points are permitted for use in U-Labels in the Root Zone, which labels are variants of each other and, where variants exist, whether such variant labels are deemed allocatable for the Root Zone.

Generation Panels will be formed for each script, but are in different stages of formation based on the activity of the communities that they serve:

  • To date, the Arabic Script Generation Panel is fully formed and operational. The Panel convened in person at the ICANN 49 in Singapore.
  • Members of the Chinese community have submitted a formal proposal to form the Chinese Generation Panel, which is currently under review by ICANN.
  • A group of volunteers interested in forming the Neo-Brahmi Generation Panel is actively recruiting members. Interested parties should view the Call for Participation [PDF, 72 KB].
  • There has been significant activity in the Cyrillic, Korean, and Japanese scripts communities. Various community members have taken the initiative and led efforts in forming Generation Panels.
  • Other script communities have not yet formed Generation Panels. If you are interested in establishing a Generation Panel, view the Call for Generation Panels to develop Root Zone Label Generation Rules [PDF, 149 KB].

Other ways to participate:

Before the Generation Panels can begin their work, the maximal set of code points from which the Generation Panels can construct their Label Generation Rules must be defined. The Integration Panel has defined this maximal set of code points in the Maximal Starting Repertoire (MSR-1), which is currently available for public comment. The comment period is open until 30 April 2014, and the reply period is open from 1 May 2014 to 21 May 2014. To review the MSR-1 and submit your comments, access here the public comment forum.

For additional information, view the July 2013 announcement of the Call for Generation Panels to Develop Root Zone Label Generation Rules. Inquiries and expressions of interest may be sent to idntlds@icann.org.


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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."