Canonical Combining Class - CCC133

CCC133 is a specific numeric value assigned to certain characters, indicating that they combine with preceding base characters in a way that requires a high priority in the ordering of mark placement, specifically above both the base and any other combining marks. This value is used for characters like the Devanagari vowel sign U, which attaches to a consonant in a visually distinct manner, often as a raised or detached mark. The higher the CCC value, the farther from the base character the mark is positioned, and CCC133 places the mark above most other diacritics, ensuring correct rendering in complex scripts where multiple marks stack. It does not affect the phonetic value but determines the visual order during text shaping, and characters with this value are treated as non-spacing, meaning they do not advance the cursor position. This ensures predictable and consistent display across different fonts and text engines.