Grapheme Base - No
No is a binary classification indicating that a character does not serve as a starting point for a grapheme cluster, meaning it cannot independently begin a visible graphic unit. This applies to combining marks, spacing combining marks, control characters, and format characters, which instead attach to a preceding base character or act as invisible modifiers. Consequently, such characters are not rendered as standalone symbols but integrate with or alter the appearance of an adjacent base, ensuring that text segmentation and cursor movement treat them as part of a larger unit. This value is essential for correctly processing complex scripts, such as Indic or Southeast Asian languages, where vowels and diacritics must combine with consonants.