distinctiontana_purposes_three_registers_jati_differentiation_enumeration enumeration Tānas serve three purposes: attainment of three registers, differentiation of jātis/rāgas of both grtana_definition definition Tāna involves omission of svaras and establishes a specific pattern in ascent; tānas have yajña-nametana_definition_cyclic_permutations definition Tāna is a svara-aggregate formed by cyclic permutations following ascending and descending order.relation