Indic Matra Category - Left And Right

Left And Right is a value used to describe the positioning of certain vowel signs in Indic scripts, specifically those that extend on both sides of a consonant base. This category applies to matras that visually appear partially before and partially after the consonant letterform, rather than only to the left or only to the right. Such signs often represent diphthongs or complex vowels, and their rendering requires special shaping and positioning logic to ensure the correct visual order and ligature formation. The value helps text layout engines determine how to anchor and combine these bidirectional marks with the base character.