Skip to main content

Announcements

Data Retention Waiver - 101Domain GRS Limited

DATA RETENTION WAIVER 101DOMAIN GRS LIMITED 101DOMAIN GRS LIMITED (Formerly - "Emerald Global Registrar Services Limited") ("Registrar") submitted to ICANN a Registrar Data Retention Waiver Request ("Waiver Request") on the basis of Registrar's...

Data Retention Waiver - Emerald Registrar Limited

DATA RETENTION WAIVER EMERALD REGISTRAR LIMITED EMERALD REGISTRAR LIMITED ("Registrar") submitted to ICANN a Registrar Data Retention Waiver Request ("Waiver Request") on the basis of Registrar's contention that compliance with the data...

Data Retention Waiver - Hosting Concepts B.V. d/b/a Openprovider

DATA RETENTION WAIVER HOSTING CONCEPTS B.V. d/b/a OPENPROVIDER Hosting Concepts B.V. d/b/a Openprovider ("Registrar") submitted to ICANN a Registrar Data Retention Waiver Request ("Waiver Request") on the basis of Registrar's contention that...

Data Retention Waiver - TransIP B.V.

DATA RETENTION WAIVER TransIP B.V. TransIP B.V. ("Registrar") submitted to ICANN a Registrar Data Retention Waiver Request ("Waiver Request") on the basis of Registrar's contention that compliance with the data collection and/or retention...

BROWSE ALL ANNOUNCEMENTS

Multimedia

0

ICANN55 Wrap Up Interview with Atallah and Crocker

ICANN's Luna Madi sat down with interim ICANN President & CEO Akram Atallah and ICANN Board Chair Steve Crocker to talk about ICANN's historic week. They discussed the community's extraordinary...

0

Interview with James Bladel, GNSO Council Chair

James Bladel reflects on the GNSO passing of the Accountability Final Report and all 12 recommendations during its public Council meeting in Marrakech and points to future work that lays ahead for...

Artworks 000150913126 4ubujn t500x500

ICANN55 Wrap Up Interview With Atallah And Crocker

ICANN's Luna Madi sat down with interim ICANN President & CEO Akram Atallah and ICANN Board Chair Steve Crocker to talk about ICANN's historic week. They discussed the community's extraordinary...

Artworks 000150427178 u9yfsu t500x500

Interview With Katrina Sataki ccNSO Chair At ICANN55

Interview With Katrina Sataki ccNSO Chair At ICANN55

BROWSE ALL MULTIMEDIA

Blog Posts

Hero1 security risk clarity 750x500 16mar16 en

Lending Clarity to Security Risk Definitions - For ICANN Community and Beyond

Hero1 blog canada internet needs you 07mar16 en

Dear Canada, The Internet NEEDS You

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."