Re: About the European MES-2 subset (was: PUA Audio Description, Subtitle, Signing)

From: Philippe Verdy (verdy_p@wanadoo.fr)
Date: Thu Jul 17 2003 - 18:57:16 EDT

  • Next message: Kenneth Whistler: "Re: About the European MES-2 subset (was: PUA Audio Description, Subtitle, Signing)"

    On Thursday, July 17, 2003 9:23 PM, Michael Everson <everson@evertype.com> wrote:

    > At 17:01 +0100 2003-07-17, William Overington wrote:
    > > Now, I have never heard of the MES-2 whatever that is. However, I
    > > do not have deep knowledge of the various standards which exist.
    > > Could you possibly say some more about MES-2 please.
    >
    > 282 MES-2 is specified by the following ranges of code positions as
    > indicated for each row.
    > Rows: Positions (cells)
    > 00: 20-7E A0-FF
    > 01: 00-7F 8F 92 B7 DE-EF FA-FF
    > 02: 18-1B 1E-1F 59 7C 92 BB-BD C6-C7 C9 D8-DD EE
    >
    > 03: 74-75 7A 7E 84-8A 8C 8E-A1 A3-CE D7 DA-E1
    > 04: 00-5F 90-C4 C7-C8 CB-CC D0-EB EE-F5 F8-F9
    >
    > 1E: 02-03 0A-0B 1E-1F 40-41 56-57 60-61 6A-6B 80-85 9B
    > F2-F3
    > 1F: 00-15 18-1D 20-45 48-4D 50-57 59 5B 5D 5F-7D
    > 80-B4 B6-C4 C6-D3 D6-DB DD-EF F2-F4 F6-FE
    > 20: 13-15 17-1E 20-22 26 30 32-33 39-3A 3C 3E 44 4A
    > 7F 82 A3-A4 A7 AC AF
    > 21: 05 16 22 26 5B-5E 90-95 A8
    > 22: 00 02-03 06 08-09 0F 11-12 19-1A 1E-1F 27-2B
    > 48 59 60-61 64-65 82-83 95 97
    > 23: 02 10 20-21 29-2A
    >
    > 25: 00 02 0C 10 14 18 1C 24 2C 34 3C 50-6C 80 84 88 8C
    > 90-93 A0 AC B2 BA BC C4 CA-CB D8-D9
    > 26: 3A-3C 40 42 60 63 65-66 6A-6B
    >
    > FB: 01-02
    > FF: FD

    As most of these characters are canonically decomposable, shouldn't this
    list include also the decomposed characters?

    Why is row 03 so resticted? Shouldn't it include those accents and
    diacritics that are used by other characters once canonically
    decomposed? Or does it imply that MES-2 is only supposed to use
    strings if NFC form?

    Also, is this list under full closure with existing character properties, like
    NFKD decompositions, and case mappings?

    -- 
    Philippe.
    Spams non tolérés: tout message non sollicité sera
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