U+1CF31 "𜼱" Znamenny Combining Tonal Range Mark Svetlo Unicode Character

U+1CF31 "𜼱" Znamenny Combining Tonal Range Mark Svetlo is a combining mark used in the Znamenny notation system, a medieval Slavic musical notation primarily associated with Russian Orthodox liturgical chant. This specific mark, named "Svetlo," indicates a tonal or melodic range adjustment, placed above or within a neume to modify the pitch contour of the chant. It is part of a larger Unicode block for Znamenny notation, which was added to support the digital representation of this historical music script, preserving its unique visual and musical properties for scholarly and liturgical use.