Canonical Combining Class - Double Below

Double Below is a numeric value assigned to certain diacritical marks that sit underneath a base character, specifically indicating a combining class of 202. This value tells rendering engines and text processing systems how to order multiple combining marks when stacking occurs, ensuring that characters with Double Below are placed in a predictable position relative to other marks. It is used for signs like the double grave accent or double breve below, which require two vertical elements beneath the glyph. By following this ordering rule, software can correctly compose complex text, such as in phonetic notation or certain European languages, without visual ambiguity.