UM1052 Back emf waveform

[SRedd.5]

In the determination of the Hall electrical phase shift shown in the UM1052 document

Please tell me BemfC i am assuming it is C with respect to A ?

BemfA is Phase A with respect to B?

BemfB is Phase B with respect to C?

I mean it is the phase to phase voltage and not phase to neutral voltage?