Descriptions about data in partnet_mobility_graph_v4

[MayuOshima]

Hello, thanks for your excellent work!

When I load data(xxx.npz) from partnet_mobility_graph_v4, it seems it stores information about the node in data['V'] and the edge in data['E']. Then I print data['V'] and data['E'], and there are some keys.
For example, 'bbox_L' in data['V'] may mean the lengths of the bounding box.
But there are other keys I do not understand what they stand for.
For example, ['e0', 'e1'] in 'E', and ['src_name', 'dst_name', 'axis', 'T_src_j1', 'T_j2_dst', 'src_ind', 'dst_ind', 'plucker', 'T0'] in data['E']['e0'].

So can you update a document to describe what each key means for .npz data in partnet_mobility_graph_v4?

Thank you :)