Joining Group - Gaf

Gaf is a joining group designation used for certain Arabic script characters, specifically those that represent the Persian and Urdu letter for the sound “g,” such as گ. This value indicates that these letters participate in cursive joining behavior, connecting to preceding and following characters in a word, but with a distinct shaping pattern that differs from the standard Arabic kaf. In practice, Gaf characters follow the same bidirectional joining rules as other Arabic letters, meaning they have initial, medial, final, and isolated forms, yet their contextual forms are mapped separately to preserve the visual identity of the gaf glyph across different fonts and languages. This classification ensures that text rendering systems correctly display these letters in regions where Persian, Urdu, or other languages using the extended Arabic script are written, maintaining legibility and proper calligraphic style.