ICU: What does NFD and NFC mean?

Question

I found a snippet which reads

Any-Latin; NFD; [:Nonspacing Mark:] Remove; NFC; [:Punctuation:] Remove; Lower();

...and is supposed to make arbitrary string well fitting into a URL.

So, I guess the things between the semicolons are something like "commands" which are to be executed, but what particularly does NDF and NFC stand for? I really did find nothing even in the official documentation...

oy thanks; you should have posted that as an answer for I can accept it.. what should I do? — Adrian Föder, May 17 '16 at 11:35
If that link does not help you write your own answer then I'll have to apologize. — Hans Passant, May 17 '16 at 11:53
@AdrianFöder where in the official documentation did you look? Asking so I can improve it. — Steven R. Loomis, Jul 19 '16 at 21:00

Steven R. Loomis · Accepted Answer · 2016-07-19T20:55:55.803

5

See ICU transliterators and the linked page on TR15 normalization forms for complete examples.

Normalization Form D (NFD) Canonical Decomposition

Normalization Form C (NFC) Canonical Decomposition, followed by Canonical Composition

Normalization Form KD (NFKD) Compatibility Decomposition

Normalization Form KC (NFKC) Compatibility Decomposition, followed by Canonical Composition

edited Jul 19 '16 at 20:55

answered Jul 19 '16 at 20:10

Steven R. Loomis

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ICU: What does NFD and NFC mean?

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