Joining Group - KNOTTED HA

KNOTTED HA is a specific joining group value used in Arabic script text shaping, representing a variant form of the letter ha that features a distinctive looped or knotted appearance in its initial and medial connections. This value helps rendering engines determine how the character connects to adjacent letters, particularly in scripts like Sindhi or other languages where this historical glyph shape appears. Unlike the standard HA joining group, which has straightforward rightward connections, KNOTTED HA may involve more complex ligature behavior, ensuring that the character visually matches its traditional calligraphic form within connected text. It is applied only to certain code points that carry this specific joining group, allowing for correct contextual shaping without altering the base letter’s semantic identity.