Mapping Characters in IDNA

Document Type Expired Internet-Draft (idnabis WG)
Last updated 2015-10-14 (latest revision 2009-10-19)
Stream IETF
Intended RFC status Informational
Expired & archived
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Stream WG state WG Document
Document shepherd No shepherd assigned
IESG IESG state Expired (IESG: Dead)
Telechat date
Responsible AD Lisa Dusseault
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


In the original version of the Internationalized Domain Names in Applications (IDNA) protocol, any Unicode code points taken from user input were mapped into a set of Unicode code points that "make sense", which were then encoded and passed to the domain name system (DNS). The current version of IDNA presumes that the input to the protocol comes from a set of "permitted" code points, which it then encodes and passes to the DNS, but does not specify what to do with the result of user input. This document describes the actions that can be taken by an implementation between user input and passing permitted code points to the new IDNA protocol.


Pete Resnick (
Paul Hoffman (

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)