It is a janya rāgam (derived scale), as it does not have all the seven swaras (musical notes).
In Hindustani music a raga that closely resembles Revati is Bairagi Bhairav.
It is a pentatonic scale (audava-audava ragam[1][2] in Carnatic music classification – audava meaning 'of 5').
Its ārohaṇa-avarohaṇa structure (ascending and descending scale) is as follows (see swaras in Carnatic music for details on below notation and terms): (notes used in this scale are shuddha rishabham, shuddha madhyamam, panchamam, kaisiki nishadham) Revati is considered a janya rāgam of Ratnangi, the 2nd Melakarta rāgam, though it can be derived from other melakarta rāgams, Vanaspati, Hanumatodi, Natakapriya, Vakulabharanam or Chakravakam, by dropping both gāndhāram and dhaivatam.
In Japanese/Western music Revati corresponds to Insen scale Revati's notes when shifted using Graha bhedam, yields 2 other pentatonic rāgams, namely, Shivaranjani and Sunadavinodini.