U+1CF99 "𜾙" Znamenny Neume Strela Klyuchenepostoyannaya Unicode Character

U+1CF99 "𜾙" Znamenny Neume Strela Klyuchenepostoyannaya is a specialized musical symbol from the Znamenny chant notation system, which was historically used in the liturgical music of the Eastern Orthodox Slavic churches, particularly in Russia. This specific neume, known as the "Strela Klyuchenepostoyannaya" or "Key-Permanent Arrow," represents a melodic figure that combines a rising arrow-like movement with a consistent or fixed key reference, indicating a precise pitch relationship within the modal structure. It belongs to the Supplementary Znamenny Notation block of Unicode, added to preserve and digitally represent the rich, complex notation of medieval and early modern church music, allowing scholars, performers, and liturgists to accurately transcribe and study these ancient chants in a modern digital environment.