The spellings are equivalent under the naming rules. That's all that formally matters. Fixing this now, would break any literal-minded parsers for whichever file is changed, while not making a formal difference.

There are enough other idiosyncrasies in the way these files are organized, that this one is far from the worst.

The only rule that matters is that any of the values in PropertyValueAliases.txt, when matched without regard to case, hyphens, or underscore, matches all the other ones for the same property value.

For character names, spaces also don't count (but there are 2-3 odd exceptional names that need to be handled specially).

A./

On 2/18/2025 8:04 AM, Phil Smith III via Unicode wrote:
This sounds interesting, but with no links or other references is a bit opaque. 
Can you add more information?

-----Original Message-----
From: Unicode <[email protected]> On Behalf Of prospero via 
Unicode
Sent: Monday, February 17, 2025 3:11 PM
To: [email protected]
Subject: Why does the spelling (capitalization) of decomposition types differ 
in DerivedDecompositionType.txt from UnicodeData.txt?

For example, "Nobreak" in DerivedDecompositionType.txt vs "noBreak" in 
UnicodeData.txt. If the former is derived from the latter, shouldn't the spelling be identical?



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