AltDUDE version 0.0.2

Document Type Expired Internet-Draft (idn WG)
Author Adam Costello 
Last updated 2001-03-22
Stream Internet Engineering Task Force (IETF)
Expired & archived
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Stream WG state WG Document
Document shepherd No shepherd assigned
IESG IESG state Expired
Consensus Boilerplate Unknown
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


DUDE [DUDE01] by Mark Welter and Brian Spolarich is an ASCII-Compatible Encoding (ACE) of Unicode strings, and AltDUDE is a slight variation on it that is conceptually simpler. AltDUDE is a reversible map from a sequence of unsigned integers (intended to be Unicode code points) to a sequence of letters (A-Z, a-z), digits (0-9), and hyphen-minus (-), henceforth called LDH characters. Such a map might be useful for internationalized domain names [IDN], because host name labels are currently restricted to LDH characters by [RFC952] and [RFC1123].


Adam Costello (

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