Re: Private Use Area

From: Mark Davis (
Date: Thu Apr 24 2003 - 14:14:41 EDT

  • Next message: Thomas Chan: "Re: Private Use Area"

    With just a little bit of Perl hackery, one could sift through all of the charsets on, accumulating all of the PUA characters used there.
    Anything left over would be pretty clear (currently).

    Märk Dāvĭs
    IBM, MS 50-2/B11, 5600 Cottle Rd, SJ CA 95193
    (408) 256-3148
    fax: (408) 256-0799

    ----- Original Message -----
    From: "Doug Ewell" <>
    To: "Unicode Mailing List" <>
    Cc: "Michael (michka) Kaplan" <>; "Michael Everson" <>
    Sent: Thursday, April 24, 2003 08:46
    Subject: Re: Private Use Area

    > Michael (michka) Kaplan <michka at trigeminal dot com> wrote:
    > > Unless you write your OS and your apps, you have to assume that
    > > anyone or veryone may be using some random piece of the PUA and not
    > > explaining it. Apps may try not to do this, and OSes may try to do
    > > the same, but assuming that someone will not stomp on them is a true
    > > and tried recipe for disappointment....
    > I'm sure Michael already knew this, and just wanted to know what pieces
    > have *already* been stomped on.
    > I think information like this, about what ranges in the PUA have been
    > used by what organizations for what general purpose, might make a good
    > Technical Note. This is *not* a suggestion that the Unicode Consortium
    > or UTC "standardize" or "sanction" or "approve" any of these uses, or
    > list the code point allocations in detail. Just a description of the
    > ranges, vendor/government/user, and general purpose of the allocated
    > range (e.g. "additional Han characters," "presentation glyphs," or
    > "artificial and constructed scripts").
    > This might help people like Michael who want to assign one or more PUA
    > code points without stomping on those who got there first.
    > If anyone would like to send me this type of information, I can try to
    > organize it into a Web page. I already know about:
    > * the ConScript Unicode Registry,
    > * assignments in Microsoft's Verdana Ref font, documented in Asmus
    > Freytag's "What Is This Character?" PDF file,
    > * assignments made by the Chinese government for GB 18030, and
    > * William Overington's various PUA projects.
    > -Doug Ewell
    > Fullerton, California

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