A basis for the organisation and classification of ragas depending on the notes used
Thaat:
Bilawal
Preferred time or season for playing
Time:
Late morning
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
Do not follow strict ascending or descending order of notes
Vakra
Emotions evoked by the raga
Mood:
Bhakti (Devotion), Shringar (Romantic)
Alhaiya Bilawal is considered as the representative raga of Bilawal
A basis for the organisation and classification of ragas depending on the notes used
thaat
. Both forms of are used in this raga.
A natural note (corresponds to notes in Western major scale)
Shuddha
 is used both in
Ascending movement of notes
aroh
 and
Descending movement of notes
avaroh
 while
A flat note
komal
 is used only in avaroh, usually as phrase. is omitted in the aroh. In aroh, will usually have the touch/
A note played for a short duration before the main note
grace
 of and in avaroh, the touch of . But in fast movements this gets simplified and used linearly.