message ScaleParameter {
 // The first axis of bottom[0] (the first input Blob) along which to apply
 // bottom[1] (the second input Blob). May be negative to index from the end
 // (e.g., -1 for the last axis).
 //
 // For example, if bottom[0] is 4D with shape 100x3x40x60, the output
 // top[0] will have the same shape, and bottom[1] may have any of the
 // following shapes (for the given value of axis):
 // (axis == 0 == -4) 100; 100x3; 100x3x40; 100x3x40x60
 // (axis == 1 == -3) 3; 3x40; 3x40x60
 // (axis == 2 == -2) 40; 40x60
 // (axis == 3 == -1) 60
 // Furthermore, bottom[1] may have the empty shape (regardless of the value of
 // "axis") -- a scalar multiplier.
 optional int32 axis = 1 [default = 1];
 // (num_axes is ignored unless just one bottom is given and the scale is
 // a learned parameter of the layer. Otherwise, num_axes is determined by the
 // number of axes by the second bottom.)
 // The number of axes of the input (bottom[0]) covered by the scale
 // parameter, or -1 to cover all axes of bottom[0] starting from `axis`.
 // Set num_axes := 0, to multiply with a zero-axis Blob: a scalar.
 optional int32 num_axes = 2 [default = 1];
 // (filler is ignored unless just one bottom is given and the scale is
 // a learned parameter of the layer.)
 // The initialization for the learned scale parameter.
 // Default is the unit (1) initialization, resulting in the ScaleLayer
 // initially performing the identity operation.
 optional FillerParameter filler = 3;
 // Whether to also learn a bias (equivalent to a ScaleLayer+BiasLayer, but
 // may be more efficient). Initialized with bias_filler (defaults to 0).
 optional bool bias_term = 4 [default = false];
 optional FillerParameter bias_filler = 5;
}