Joining Group - Kaf

Kaf is a joining group that defines the cursive connection behavior for the Arabic letter kaf in its various contextual forms, specifically distinguishing it from other letters that share similar shapes, such as the Persian keheh or the Arabic lam. This group dictates that when kaf appears in initial or medial positions, it connects to the following character, while in final or isolated forms, it does not connect to a preceding character, following the standard right-to-left joining rules. The practical effect is that kaf joins smoothly with adjacent letters in a word, but its left side remains unconnected in terminal positions, ensuring proper shaping in scripts like Arabic, Urdu, and Persian. This designation helps render text accurately across different fonts and shaping engines.