Re: Emoji and cell phone character sets...

From: Asmus Freytag (
Date: Fri Jan 09 2009 - 02:40:07 CST

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    On 1/8/2009 6:39 PM, Christopher Fynn wrote:
    > ... there are already cell phones available in Tibet which use a
    > pre-composed Tibetan character set:
    > <>.
    As long as these Tibetan character sets can't actually express something
    that can't also be expressed in the standard Unicode encoding of
    Tibetan, there's no issue here. The requirement is to losslessly convert
    and roundtrip the text, not the code element. In particular, if they are
    true pre-composed characters it should always be possbile to transcode
    them using their decomposition in Unicode and then to compose back on

    The only issue arises, when these conversions aren't unique - as was the
    case with converting from shaped, visual ordered Arabic to Unicode's
    implictly ordered and implicitly shaped Arabic. At that point, pressure
    arose to add compatibility characters for positional presentation forms
    in order to allow lossless transcoding of legacy data.


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