What is the axis in terms of which the SMPL pose parameters are defined?

[coder-rakeshpaul]

Hi I am aware that the pose parameters that you give in the smpl are present in terms of angles. I want to know in what type of axis are the angles defined in . Is it local axis or global axis?

In case it's local axis how are the axis defined (a quaternion or something?)

Thanks you @mkocabas