> C10 When a process purports not to modify the interpretation of a valid coded character representation,
> it shall make no change to that coded character representation other than
> the possible replacement of character sequences by their canonical-equivalent sequences
> or the deletion of noncharacter code points.
つまり統合漢字+VSを互換漢字+VSに置き換えてもテキストの解釈は変化しない。