Indic Syllabic Category - Brahmi Joining Number

Brahmi Joining Number is a numeric attribute assigned to certain Brahmi-derived script characters, indicating their specific joining behavior in cursive text. This value, typically 0, 1, or 2, determines whether a character connects to the following glyph, to the preceding glyph, both, or neither, based on ancient Brahmi scribal conventions. A value of 0 signifies no joining, 1 means joining to the next character, and 2 indicates joining to both sides, with exceptions for conjuncts and vowel signs. This helps shape ligature formation and visual continuity in scripts like Devanagari, Bengali, or Tamil, where characters may blend or split depending on their position. The number is not a phonetic or syntactic cue but purely a graphic trait, guiding font rendering and text shaping. By standardizing these join rules, it ensures consistent display across digital platforms, preserving the historical flow of Brahmi-derived writing systems.