Grapheme Extend - No
No is the classification for code points that do not act as spacing or nonspacing marks attached to a base character within a grapheme cluster. These characters, such as letters, digits, punctuation, and symbols, stand alone as their own grapheme, meaning they do not extend or modify a preceding base character’s visual or phonetic form. Consequently, they break the cluster boundary, so a sequence of two “No” values forms two separate graphemes, whereas combining marks (like diacritics) or zero-width joiners receive a “Yes” value to indicate they continue the cluster. This distinction is crucial for text segmentation, cursor movement, and editing, as it ensures that base characters and their modifiers are treated as indivisible units, while independent characters remain isolated.