RE: The Bidi Class of the Khmer Symbols U+17F0 to U+17F9

From: Sue and Maurice Bauhahn (
Date: Thu Apr 29 2004 - 01:18:09 EDT

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    I've passed an inquiry regarding the use of these divination symbols off to
    Cambodia...and hope to have some feedback.

    Thanks to the standardisation help of some of you good folk, Khmer Unicode
    is alive and well with implementations in Graphite, OpenType/Uniscribe in
    Office2003, OpenType/Pango on Linux/Unix, and Apple AAT. On the Web one
    particularly impressive site is:



    -----Original Message-----
    From: []On
    Behalf Of Ernest Cline
    Sent: 29 April 2004 02:34
    To: Kenneth Whistler
    Subject: Re: The Bidi Class of the Khmer Symbols U+17F0 to U+17F9

    > [Original Message]
    > From: Kenneth Whistler <>
    > > So my question is, is this Bidi Class of these numbers correct?
    > As best we know.
    > > Since their behavior when used with Khmer would be the same
    > > as if they had been given Bidi Class L, if it is an error, it is
    > > understandable how it could have escaped notice by the
    > > users of this script. If it isn't an error, could someone please
    > > explain why they are have class ON instead of class L?
    > Because they were represented to the UTC as being a bunch of
    > symbols, essentially.
    > Keep in mind that these are not at all normal digits. They are
    > exceedingly esoteric, and from the examples in the originating
    > documents it isn't clear how they lay out with other *Khmer*
    > characters, let alone any other script.

    OK, typically symbols used with only one script share the same
    Bidi class as the letters of the script, but I can reluctantly concede
    based on the parallel with the East Asian divination symbols in
    Unicode that they might deserve Bidi Class ON. As such, unless
    someone can present evidence to the contrary, I can understand,
    and even applaud an unwillingness to change the Bidi Class to L.

    That'll make my Private Use proposal larger now that it needs to
    accommodate Khmer Symbol-like characters. I don't hold any
    great hopes for the proposal being accepted, but I figure the
    smaller I can make it, the better chance that it will have.

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