DUNCE: A proposal for a Definitely Unencumbered New Compatible [ACE] Encoding

Document Type Expired Internet-Draft (idn WG)
Author John Klensin 
Last updated 2001-04-24
Stream Internet Engineering Task Force (IETF)
Intended RFC status (None)
Expired & archived
pdf htmlized (tools) htmlized bibtex
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This Internet-Draft is no longer active.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


This document describes a transformation method for representing non-ASCII characters in host name parts in a fashion that is completely compatible with the current DNS. It is a potential candidate for an ASCII-Compatible Encoding (ACE) for internationalized host names, as described in the comparison document from the IETF IDN Working Group. This method is based exclusively on long-established mechanisms for denoting the positions of characters in tables, but included variations for compressing that information, also based on long-established mechanisms.


John Klensin (klensin@jck.com)

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