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Re: Standardizing on IDNA 2003 in the URL Standard

From: Mark Davis ☕ <mark@macchiato.com>
Date: Mon, 19 Aug 2013 19:31:53 +0200
Message-ID: <CAJ2xs_E6zFRFqaxnhYLGXkmM85rbNA3EcXf_0oV24=A_7TqjGg@mail.gmail.com>
To: Anne van Kesteren <annevk@annevk.nl>
Cc: Peter Saint-Andre <stpeter@stpeter.im>, "public-iri@w3.org" <public-iri@w3.org>, "uri@w3.org" <uri@w3.org>, "www-tag.w3.org" <www-tag@w3.org>
On Mon, Aug 19, 2013 at 7:01 PM, Anne van Kesteren <annevk@annevk.nl> wrote:

> As far as I can tell from implementations what it means is that the
> NFKC normalization algorithm from Unicode is the one defined in the

Rather than promoting different, arbitrary modifications of IDNA2003, ​I
would recommend instead using the TR46 specification, ​which provides a
migration path from IDNA2003 to IDNA2008. It is, with some small
exceptions, compatible with IDNA2003.

"To satisfy user expectations for mapping, and provide maximal
compatibility with IDNA2003, this document specifies a mapping for use with
IDNA2008. In addition, to transition more smoothly to IDNA2008, this
document provides a Unicode algorithm for a standardized processing that
allows conformant implementations to minimize the security and
interoperability problems caused by the differences between IDNA2003 and
IDNA2008. This Unicode IDNA Compatibility Processing is structured
according to IDNA2003 principles, but extends those principles to Unicode
5.2 and later. It also incorporates the repertoire extensions provided by

For more see http://unicode.org/reports/tr46/.

Mark <https://plus.google.com/114199149796022210033>
*— Il meglio è l’inimico del bene —*
Received on Monday, 19 August 2013 17:32:23 UTC

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