| From: | Gianni Ceccarelli <dakkar(at)thenautilus(dot)net> |
|---|---|
| To: | pgsql-general(at)lists(dot)postgresql(dot)org |
| Subject: | Re: unicode match normal forms |
| Date: | 2021-05-17 14:04:50 |
| Message-ID: | 20210517150450.50e499f1@exelion |
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| Lists: | pgsql-general |
On Mon, 17 May 2021 15:45:00 +0200
Matthias Apitz <guru(at)unixarea(dot)de> wrote:
> There is only *one* codepoint for the German letter a Umlaut:
> LATIN SMALL LETTER A WITH DIAERESI U+00E4
True. On the other hand, the sequence:
* U+0061 LATIN SMALL LETTER A
* U+0308 COMBINING DIAERESIS
will render exactly the same glyph. The two forms are closely related:
U+00E4 is in NFC (normalization form canonical composition), U+0061
U+0308 is in NFD (normalization form canonical decomposition).
See https://en.wikipedia.org/wiki/Unicode_equivalence#Normalization
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Dakkar - <Mobilis in mobile>
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