Re: ASCII as a subset of Unicode (was: Re: Oxford proposes a leaner alphabet)

From: Mark Davis (mark.edward.davis@gmail.com)
Date: Sat Apr 11 2009 - 20:05:20 CDT

  • Next message: Hans Aberg: "Re: Oxford proposes a leaner alphabet"

    I agree. One needs to distinguish the ASCII characters from the ASCII encoding
    scheme.

    The ASCII characters are represented in Unicode at codepoints
    U+0000..U+007F. The ASCII encoding scheme represents these as bytes
    %00..%7F, as does the UTF-8 encoding scheme. Other encoding schemes, like
    EBCDIC CCSID 500, may use different byte sequences for the ASCII characters.

    Mark

    On Sat, Apr 11, 2009 at 14:54, Doug Ewell <doug@ewellic.org> wrote:

    > Hans Aberg <haberg at math dot su dot se> wrote:
    >
    > I continue to believe the difference between "ASCII characters" and
    >>> "Unicode characters" is analogous to the difference between "flutes" and
    >>> "musical instruments."
    >>>
    >>
    >> Well, what is the mathematical or computer definition of "flutes" and
    >> "musical instruments"?
    >>
    >
    > "Analogous." Flutes and musical instruments are not mathematical or
    > computer concepts. The common definition of a flute, however, is that it is
    > a particular type of musical instrument.
    >
    > Let me try a different approach. What do you believe is the difference
    > between an ASCII "A" and a Unicode "A" -- not the bitwise representations
    > permitted by ASCII and Unicode respectively, but the characters themselves?
    >
    >
    > --
    > Doug Ewell * Thornton, Colorado, USA * RFC 4645 * UTN #14
    > http://www.ewellic.org
    > http://www1.ietf.org/html.charters/ltru-charter.html
    > http://www.alvestrand.no/mailman/listinfo/ietf-languages ˆ
    >
    >
    >

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