Indic Positional Category - Top
Top is a classification applied to certain Indic script characters, indicating that they attach to the top of a base consonant or vowel sign. This positional category covers marks like vowel signs (matras), diacritical marks, and combining symbols that are placed above the main character, often over the headline or shirorekha in scripts such as Devanagari, Bengali, or Gujarati. The top position influences shaping, reordering, and rendering behavior, ensuring these marks stack correctly without conflicting with other top-attached signs. It is distinct from other positions like bottom, left, or right, and includes subcategories for marks that are primarily top-attached but may also have secondary placement rules. In practice, this value helps fonts and text engines determine vertical stacking and ligature formation for correct visual output.