Indic Conjunct Break - Extend

Extend is a value that marks characters which act as extenders in the formation of Indic conjuncts, meaning they do not initiate or break a conjunct but instead continue an existing one. These characters typically include vowel signs, certain diacritical marks, and other modifiers that attach to a consonant or a conjunct base without causing a boundary. In the context of breaking text into syllabic clusters, an Extend character joins the preceding character, ensuring that the sequence remains part of the same orthographic syllable, so it never starts a new cluster. This behavior is crucial for correct rendering and segmentation of scripts like Devanagari or Bengali, where such extending marks must stay connected to their base consonant for proper shaping and line breaking.