Skip to main content

Welcome to the new ICANN.org! Learn more, and send us your feedback. Dismiss

Resources

Structural Improvements Committee of the Board

  • photo of Rinalia Abdul Rahim
    Rinalia Abdul Rahim
    Chair
  • photo of
    Raymond A. Plzak
    Member
  • photo of Wolfgang Kleinwächter
    Wolfgang Kleinwächter
    Member
  • photo of Markus Kummer
    Markus Kummer
    Member
  • Photo of Bruno Lanvin
    Bruno Lanvin
    Member
  • photo of Kuo-Wei Wu
    Kuo-Wei Wu
    Member

Background

The Structural Improvements Committee was established by the Board at its 7 November 2008 meeting.

Charter

The Committee's charter was adopted and approved by the Board on 6 March 2009.

Presentations at ICANN Public Meetings

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."