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RZERC Correspondence

Date Correspondence Sender Affiliation Issue Related Correspondence

1 August 2016

Letter from Trang Nguyen to Chairs of IETF, GNSO RySG, ASO, ccNSO, RSSAC, SSAC and Verisign ICANN Staff Request for Appointment to the Root Zone Evolution Review Committee  
26 April 2018 Letter from Ed Lewis to RZERC Chair  ICANN Organization Request for discussion and comments on the proposed Root Zone Management Evolution Study  
26 April 2018 Proposed Study on the Root Zone Management Evolution ICANN Organization Brief Overview ICANN Root Zone Management Evolution Study  
13 May 2018 Communication from Kaveh Ranjbar on the Updated Plan for Continuing the Root KSK Rollover ICANN Board Board ask for advice on the Root KSK Rollover  
2 July 2018 Letter from Ted Hardie re-appointing Jim Reid to the RZERC IAB Confirmation of re-appointment Jim Reid to the RZREC  
25 September 2018 Clarification regarding Office of the CTO request  ICANN CTO  Root Zone Management Evolution Study  
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."