RFC 6912 on Principles for Unicode Code Point Inclusion in Labels in the DNS

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        RFC 6912

        Title:      Principles for Unicode Code Point 
                    Inclusion in Labels in the DNS 
        Author:     A. Sullivan, D. Thaler,
                    J. Klensin, O. Kolkman
        Status:     Informational
        Stream:     IAB
        Date:       April 2013
        Mailbox:    asullivan@dyn.com, 
                    dthaler@microsoft.com, 
                    john-ietf@jck.com,
                    olaf@NLnetLabs.nl
        Pages:      12
        Characters: 27078
        Updates/Obsoletes/SeeAlso:   None

        I-D Tag:    draft-iab-dns-zone-codepoint-pples-02.txt

        URL:        http://www.rfc-editor.org/rfc/rfc6912.txt

Internationalized Domain Names in Applications (IDNA) makes available
to DNS zone administrators a very wide range of Unicode code points.
Most operators of zones should probably not permit registration of
U-labels using the entire range.  This is especially true of zones
that accept registrations across organizational boundaries, such as
top-level domains and, most importantly, the root.  It is
unfortunately not possible to generate algorithms to determine
whether permitting a code point presents a low risk.  This memo
presents a set of principles that can be used to guide the decision
of whether a Unicode code point may be wisely included in the
repertoire of permissible code points in a U-label in a zone.

This document is a product of the Internet Architecture Board.

INFORMATIONAL: This memo provides information for the Internet community.
It does not specify an Internet standard of any kind. Distribution of
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