Joining Group - Manichaean Thamedh

Manichaean Thamedh is a joining group value that defines how the letter behaves in cursive script connections, specifically within the Manichaean alphabet. It indicates that this character, which resembles a curved vertical stroke with a rightward hook, takes the initial or medial positional form when joined to following letters, but does not connect to a preceding character in a ligature chain. This joining behavior is typical for letters that only link forward, meaning they stand alone at the end of a word or after a non-joining letter, while still attaching to subsequent glyphs in the same word. The Thamedh value ensures correct shaping and text rendering in scripts that rely on context-dependent letter forms, preserving the visual continuity of Manichaean writing without requiring a baseline connection to prior characters. It contributes to the systematic classification of letter-joining properties used for accurate typography and digital text display.