规范化不保留代码点 [英] Normalization does not preserve code point

问题描述

任何人都可以解释一下为什么从U + 2126（Ω）和U + 03A9（Ω）的NFD标准化导致相同的表示，不保留代码点？我会预期这种行为NFKD和NFKC（和字符与变音符号）只有。

  result1 = unicodedata.normalize NFD，u\\\Ω）
 result2 = unicodedata.normalize（NFD，u\\\Ω）
 print（NFD：+ repr（result1））
 print（NFD：+ repr（result2））
  

输出：

  NFD：u'\\\Ω'
 NFD：u'\\\Ω'
  / pre> 
 
解决方案
这些被称为单例分解，存在于像U + 2126在Unicode中与现有标准兼容。它们不是兼容性分解（如U + 1D6C0
Can anyone please explain me why the NFD normalization from U+2126 (Ω) and U+03A9 (Ω) results in the same representation and does not preserve the code point? I would have expected this behaviour for NFKD and NFKC (and for characters with diacritics) only.
result1 = unicodedata.normalize("NFD", u"\u2126")
result2 = unicodedata.normalize("NFD", u"\u03A9")
print("NFD: " + repr(result1))
print("NFD: " + repr(result2))
Output: 
NFD: u'\u03a9'
NFD: u'\u03a9'

解决方案
These are known as "singleton decompositions", and exist for characters like U+2126 (Ω) that are present in Unicode for compatibility with existing standards. They are not "compatibility decompositions" (like U+1D6C0 
                        
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