Yes Value in Changes When Uppercased Unicode Property
Yes is the designation for characters whose written form alters when converted to uppercase, meaning their lowercase or titlecase version is not simply a one-to-one mapping to a single uppercase code point. This includes characters like the German sharp s (ß), which becomes "SS" in uppercase, or the Greek final sigma (ς), which changes to a standard sigma (Σ). It also covers characters that undergo context-dependent or multi-character transformations, such as ligatures (fi to FI) or certain accented letters with distinct uppercase forms. In essence, "Yes" signals that a simple casing operation will produce a different sequence or glyph, requiring special handling in text processing, search, or display systems to ensure accurate case conversion.