White Space - Yes

Yes is the designation for characters that Unicode classifies as whitespace, meaning they create horizontal or vertical space in text layout without producing a visible glyph. This includes the space (U+0020), tab (U+0009), line feed (U+000A), carriage return (U+000D), form feed (U+000C), and other less common separators like the non-breaking space (U+00A0), en and em spaces (U+2002, U+2003), thin space (U+2009), and zero-width no-break space (U+FEFF) when treated as a space. Software uses this flag to decide where to break lines, trim input, or collapse multiple spaces. Importantly, not every character that looks like a gap qualifies, as some control characters (like U+0085) are excluded, and characters such as the zero-width space (U+200B) are intentionally not marked. The “Yes” value thus provides a precise, machine readable way to identify only those code points that behave as actual inter word or layout separators.