Why does the spelling (capitalization) of decomposition types differ in DerivedDecompositionType.txt from UnicodeData.txt?

prospero via Unicode <[email protected]>
Newsgroups gmane.text.unicode.general
Message-ID <trinity-7925b4f8-c7a7-41be-bc7c-2e0aeafaef09-1739823085386@3c-app-mailcom-lxa12>
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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