Gizmo settings : matrix values

Hello. New to Nomad (1.84), I was playing with Gizmo settings panel and more closely to matrix values. Concerning the rotations values (you can enter either a value by hand or slide the the pencil on the field), what do they represent exactly : rotations wrt world’s xyz axis? wrt parent object’s xyz axis? What relationship with shown gizmo’s xyz axis (acts differently)?

Has it something to do with Tait-Bryan (yaw pitch roll) and Euler’s angles (intrinsic/extrinsic rotations)?

Thanks in advance for enlightening me.