Full Composition Exclusion - Yes

Yes is the designation for characters that are excluded from full composition normalization, meaning they are not decomposed into base characters plus combining marks during canonical composition. This exclusion applies to certain precomposed characters, such as those with multiple diacritics or special script-specific forms, to prevent unpredictable or lossy recombinations. When a character has this "Yes" value, it remains as a single code point and does not participate in the standard normalization algorithm’s composition step, even though it may still decompose for compatibility or other normalization forms. This ensures stable text processing, since such characters are treated as atomic units rather than being broken apart and reassembled, which could lead to visual or semantic changes.