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Root Zone Evolution Review Committee (RZERC)

The RZERC reviews proposed architectural changes to the content of the DNS root zone, the systems including both hardware and software components used in executing changes to the DNS root zone, and the mechanisms used for distribution of the DNS root zone. The RZERC was formed as a result of the IANA Stewardship Transition.


In the ICG proposal, the domain names community required that a standing committee be put into place that will provide recommendations to the ICANN Board regarding the advisability of moving forward with all major architectural changes to the DNS root. ICANN named this committee the Root Zone Evolution Review Committee (RZERC). The RZERC will consider issues raised by any of its members, PTI, or by the CSC.

While the RZERC will not necessarily be the group that considers the details of the issues under consideration, it will be responsible for ensuring that those involved in the decision include all relevant bodies and have access to necessary expertise. As such, the RZERC will coordinate with relevant organizations and communities, and if appropriate, external experts, to confirm that all affected parties are involved in discussions and recommendations regarding architectural changes to the root zone.

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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."