Re: Proposed Update Unicode Technical Standard #46 (Unicode IDNA Compatibility Processing)

From: Martin J. Dürst (
Date: Fri Sep 24 2010 - 04:54:32 CDT

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    On 2010/09/23 5:10, Markus Scherer wrote:

    > No mistake here: The 63-octet limitation only applies when generating a
    > string for the DNS lookup, that is, in the ToASCII operation. It makes no
    > sense to count DNS octets in a ToUnicode result.
    > The test file has the appropriate error code for the ToASCII result, and the
    > normal string result for ToUnicode.

    Yes indeed. For some actual examples of very long URIs (which actualy
    resolve), see tests 121 (single long label) and 122 at

    Also, for a discussion of potential length limits in IDNAbis on Unicode
    strings (which, for many good reasons, were ultimately rejected), please
    see the discussion around

    Regards, Martin.

    #-# Martin J. Dürst, Professor, Aoyama Gakuin University

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