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Minutes – IANA Committee (IC) Meeting

28 April 2009 at 15:00 UTC

Committee members present: Harald Alvestrand - Chair, Raimundo Beca, Steve Crocker, Demi Getschko, and Katim Touray

Invited Committee Members Present: Thomas Narten and Suzanne Woolf

Staff members present: Doug Brent, David Conrad, Samantha Eisner, Dan Halloran, Kurt Pritz, Barbara Roseman, Diane Schroeder, and Leo Vegoda


The following is a summary of discussions, actions taken and actions identified:

  • Approved minutes of last meeting by unanimous vote, no abstentions.
  • Received update on current work from staff.
  • Discussed the process for allocating the remaining IPv4 /8 networks to the Regional Internet Registries (RIRs) to address the potential of some networks having prior use associated with them. Action: Staff to consult with RIRs on proposed allocation method.
  • Discussed status of Root Zone signing discussions and received staff update on potential designs of solutions. Action: Staff to work to identify further guidance on acceptable forms of proposed solution.
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."