sample:NXsample
    transforms:NXtransformations
      rotation_angle
        @transformation_type=rotation
        @vector=0,1,0
        @offset=0,0,0
        @depends_on=.
      chi
        @transformation_type=rotation
        @vector=0,0,1
        @offset=0,0,0
        @depends_on=rotation_angle
      phi
        @transformation_type=rotation
        @vector=0,1,0
        @offset=0,0,0
        @depends_on=chi
    depends_on 
      transforms/phi