Question about skeletal structure and skinning weights format

[JakeXin7]

Hello,
Thank you for sharing this great dataset. I'm working with the skinning weights data and have two questions about its structure.

1. In Figure 6(f) of the paper, the skeletal structure shows several bones (like hand bones and head bone) whose endpoints don't have corresponding joint positions in the dataset. Could you clarify how these bone endpoints should be represented or derived?
2. I notice that the skinning weights are provided as a matrix of size [m, 22], where m is the number of vertices, but the skeleton has only 17 bones. I don't know how to use the skinning weights corresponding to the joints. Could you provide the method that maps the 22 weights to the bones?

Thank you for your time and for making this dataset available!