Joining Group - Manichaean Mem

Manichaean Mem is a specific value used to classify the joining behavior of a script character in text shaping and cursive rendering systems. It denotes a letter that connects on both sides to adjacent characters, following the rules of the Manichaean script, an ancient Iranian writing system. This value ensures that the character forms the correct medial or isolated glyph form depending on its position within a word, enabling proper visual ligature and flow. In practical terms, it helps digital fonts and rendering engines reproduce the script’s characteristic connected appearance, where the Mem acts as a dual-joining letter, linking to both preceding and following letters without breaking the cursive stroke. This classification is essential for accurate typographic layout in historical or liturgical texts using Manichaean script.