A basis for the organisation and classification of ragas depending on the notes used
Thaat:
Khamaj
Preferred time or season for playing
Time:
Early night
The most prominent note of a raga
Vadi
/
The second most prominent note of a raga
Samvadi:
, 
Categorization based on number of notes used in aroh and avaroh
Jati:
Containing 6 notes
Shadav
-
Containing 7 notes
Sampurna
Emotions evoked by the raga
Mood:
Chanchal (Lively), Karun (Sad, Compassionate), Shringar (Romantic)
Khamaj is the representative raga of the Khamaj thaat. It omits in
Ascending movement of notes
aroh
 and uses all the seven notes in
Descending movement of notes
avaroh
. Both forms of are used,
A natural note (corresponds to notes in Western major scale)
shuddha
 in aroh and
A flat note
komal
 in avaroh. Rest all notes are shuddha. This raga is mostly used for semi-classical presentations such as Thumri, Tappa, Dadra, Bhajan along with chhota khyal. Often the other forms of the notes are also used and then it is called Mishra Khamaj.