Re: Defined Private Use was: SSP default ignorable characters

From: Doug Ewell (
Date: Thu Apr 29 2004 - 11:34:56 EDT

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    Peter Kirk <peterkirk at qaya dot org> wrote:

    > Well, yes, but a company's purely internal use is outside the scope of
    > the standard, because you can do what you like. Of course if you are
    > using even software components designed to support the standard, it is
    > convenient for you to follow the standard, and I suppose the existence
    > of the PUA helps you.

    The PUA was brought into existence so that this apparent dichotomy would
    not exist.

    >> Now Snorefred can distribute his own font with the U+E000 character
    >> designed and mapped accordingly, and away you go. Most everything
    >> will do the right thing.
    > If Snorefred is American, yes, or for that matter European or Indian.
    > But he has a problem if he is an Arab or Israeli, and probably if he
    > is Chinese.

    I thought Ken had already explained that the default properties were
    those that suited Han characters best, since that was perceived to be
    the widest use of the PUA.

    Peter, how do you propose to solve the problem of getting software to
    understand custom PUA properties, and what is Unicode doing or not doing
    that hinders this? Other than not defining new PUAs with different
    defaults, I mean.

    -Doug Ewell
     Fullerton, California

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