Deprecated

Deprecated is a binary character property that flags code points whose use is strongly discouraged, typically because they have been replaced by a preferred alternative or are considered obsolete for modern text processing. Such characters are not removed from the standard, to preserve backward compatibility with existing data, but new text should avoid them. Common examples include formatting controls like the soft hyphen or certain spacing modifiers that were superseded by more robust mechanisms. While a deprecated character still has a defined meaning and can be rendered, its continued use may lead to inconsistent or unintended behavior across different systems and applications. Software developers and content authors are advised to treat these code points as problematic, filtering or converting them when possible, though they remain valid for legacy round-tripping and historical data integrity.