RULE id: parivartaka (1854)
SOURCE: brihaddesi_sharma_1992 (vol_I_p058, vol_I_p064)
SCOPE: technical_term family, Brihaddesi (Mātaṅga ~750 CE)
CONCEPT: parivartaka
STATUS: empirical

ASSERTIONS:
  - [definition] parivartaka is composed of sixteen kalās (phrases) formed through ascent and descent beginning from high with formulation of all svaras
    -- p.vol_I_p058 "आरोहावरोहाभ्या कलाष्टकेन तथैव तारादारभ्य सर्वस्वराणामारोहावरोहणम्। षोडशकल परिवर्तकः"
  - [enumeration] parivartaka consists of eight patterns demonstrating ascent and descent combinations: sarigapa pamagasa, rigamadha dhapamari, and others
    -- p.vol_I_p058 "स रि ग प पमगस, रि ग म ध धपमरि, ग म प नि निधपग, म प ध स सनिधम"
  - [structural] Parivarta ascends three svaras and omits a fourth svara
    -- p.vol_I_p064 "Having ascended three svaras, parivarta omits another (fourth) svara"
  - [structural] Parivarta is composed of eight kalās
    -- p.vol_I_p064 "with parāvṛtti (lit. interchange or reversion, here the change in the omitted svara in descent which is the fourth again in descending order), it is composed of"

CITED_RULES:
  - kalā  (definition)
  - kalā  (structural)
  - svaras  (definition)
  - svaras  (structural)
  - परिवर्तकः  (definition)

CONFIDENCE: empirical
PROTECT: false