Re: 8-bit encodings and ASCII (was: Unicode conformant character encodings and us-ascii)

Date: Fri May 16 2003 - 18:58:03 EDT

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    Doug Ewell wrote in response to Philippe Verdy,

    >> Finally don't forget all the DOS/OEM codepages which assign visible
    >> characters in ASCII control code units and in extended ISO6429
    >> position... However all these are not conforming to Unicode (no way
    >> to fully encode it with full roundtrip capability).
    > Now this is true, because the controls have double meanings (e.g. 0x0D
    > is both a carriage return and an eighth note).

    Is it? Isn't the eighth note simply a unique graphic used in the DOS
    font to display a single glyph for 0x0D where appropriate?

    In other words, 0x0D is not semantically equivalent to EIGHTH NOTE
    character, but rather is always CARRIAGE RETURN control character.
    The eighth note glyph is just a "control picture", isn't it?

    If somebody was converting a file from a DOS code page into Unicode,
    would it ever be appropriate to map 0x0D to U+266A [♪] ?

    Best regards,

    James Kass

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