Lowercase - Yes
Yes is a binary designation indicating that a character is defined as a lowercase letter in its script, typically meaning it has a corresponding uppercase form and is used in standard orthography for words like “a,” “b,” or “é.” This applies to letters from alphabets such as Latin, Greek, Cyrillic, and Armenian, as well as modifier letters and certain symbols with case distinctions, like the small capital forms. It excludes characters that are inherently case-insensitive, such as digits, punctuation, or script-specific letters lacking an uppercase counterpart, like the German ß or Cherokee syllables. The assignment is based on the character’s canonical case mapping, so a character qualifies if its lowercase form is distinct and recognized in Unicode’s case data, regardless of context or language. This value helps software identify case-sensitive operations, such as sorting, searching, or converting text to uppercase, by ensuring only true lowercase letters are treated as such.