Indic Matra Category - NA

NA is the default value assigned to characters that do not function as an independent vowel sign in Indic scripts. It indicates that the character carries no specific matra category, meaning it is not a dependent vowel mark that attaches to a consonant base. In practical terms, NA applies to consonants, vowels of the inherent type, punctuation, digits, and most other symbols, which are not part of the system where vowels shift into secondary, post-consonantal forms. Characters with NA are treated as neutral in shaping and reordering processes, so they do not trigger visual changes like repositioning or ligature formation that are typical of categorized matras. This value helps text rendering engines consistently identify which characters are exempt from vowel-marker behavior, ensuring that only explicit dependent vowels, such as those in Devanagari or Bengali, receive special handling.