Skip to main content

Announcements

ICANN67 Fellowship Application Round Now Open

LOS ANGELES – 18 July 2019 – Today, the Internet Corporation for Assigned Names and Numbers (ICANN) is opening the application round for the ICANN Fellowship Program taking place at the ICANN67 Public Meeting from 7-12 March 2020 in Cancún,...

The Annual ICANN APAC Space Survey is Now Open

SINGAPORE – 15 July 2019 – Today, the Internet Corporation for Assigned Names and Numbers (ICANN) launched the APAC Space Survey, which will remain open until 1 August 2019, 23:59 UTC. Your input will help to make the APAC Space more relevant to...

ICANN Announces Participants NextGen@ICANN66

LOS ANGELES – 12 July 2019 – The Internet Corporation for Assigned Names and Numbers (ICANN) has announced the names of the individuals who will participate in the NextGen program at ICANN66, to be held in Montréal, Canada, from 2 to 7 November...

GNSO Policy Development Process on IGO-INGO Access to Curative Rights Protection Mechanisms Policy Recommendations for ICANN Board Consideration

Open Date: 11 July 2019 Close Date: 20 August 2019 Originating Organization: Policy Development Support Categories/Tags: Policy Development Brief Overview: Purpose: This public comment proceeding...

BROWSE ALL ANNOUNCEMENTS

Multimedia

0

Celebrating Five Years of NextGen@ICANN!

Meet 6 of the impressive young people from around the world who took part in NextGen@ICANN program as we celebrate the fifth anniversary of the program.

0

ICANN 2019 Nominating Committee Update

Damon Ashcraft, Chair of the 2019 ICANN Nominating Committee (NomCom), and Jay Sudowski, the 2019 NomCom Chair-Elect give ICANN's James Cole an update on the Committee's progress.

Artworks 000557965560 vyy6vo t500x500

Celebrating Five Years Of NextGen@ICANN!

Meet 6 of the impressive young people from around the world who took part in NextGen@ICANN program as we celebrate the fifth anniversary of the program.

Artworks 000557855151 k42hye t500x500

Janis Karklins Talks EPDP Team Phase 2

Janis Karklins, Chair of EPDP Team Phase 2, discusses priorities for Phase 2 of the Expedited Policy Development Process on the Temporary Specification for gTLD Registration Data.

BROWSE ALL MULTIMEDIA

Blog Posts

ICANN in the Middle East – A Glance at the Past Year

Accountability and Transparency Review: Highlights from Marrakech and Share Your Views

BROWSE ALL BLOG POSTS

Sign Up to Get News Updates

Tell us which topics you care about and we'll send updates to your homepage and email.

Already have an Account? Sign In

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."