Has there been any talk of creating a standardized Skeleton message? Right now, it seems like the openni_tracker package just publishes transforms. It seems like if the Kinect does skeleton tracking, there should be a skeleton message.
I know pi_tracker has its own Skeleton message, which looks like it might fit the bill, although I don't think it defines which parts are connected (hip bone is connected to the thigh bone).
It might be good to have for not only the Kinect, but for other motion capture rigs (Vicon and the like).
Are there any other similar message out there?