Re: Cases of signs? [RE: simple case mappings across UTF-8 length boundaries]

From: Markus Scherer (
Date: Tue Jul 01 2003 - 20:50:07 EDT

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    The Ohm sign is canonically equivalent to an Omega (U+03A9), and similar for Kelvin and Angstrom.
    They are the same characters in practice (except for 1:1 codepage mappings) and need to be treated
    the same.

     From UnicodeData.txt:
    2126;OHM SIGN;Lu;0;L;03A9;;;;N;OHM;;;03C9;
    212A;KELVIN SIGN;Lu;0;L;004B;;;;N;DEGREES KELVIN;;;006B;
    212B;ANGSTROM SIGN;Lu;0;L;00C5;;;;N;ANGSTROM UNIT;;;00E5;


    Kurosaka, Teruhiko wrote:
    > Markus,
    > This is interesting. Do you know why Unicode decided that these
    > signs should have case-ness (?)? The lower case of the Ohm sign does not
    > make sense to me. What could that mean?
    >>From: Markus Scherer []
    >>Sent: Tuesday, July 01, 2003 1:30 PM
    >>To: unicode
    >>Subject: simple case mappings across UTF-8 length boundaries
    >>U+2126 simple-lowercases to U+03c9
    >>U+2126 is OHM SIGN
    >>U+212a simple-lowercases to U+006b
    >>U+212a is KELVIN SIGN
    >>U+212b simple-lowercases to U+00e5
    >>U+212b is ANGSTROM SIGN

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