Look at the size of a CR2 compared to the object file it points to. The data for the obj is small compared to all the channels of data needed to keep track of where the arm is and the hand etc. So you don't have the data that defines the mesh, but you do have it for how the mesh will be formed.

Poser 5, 6, 7, 8, Poser Pro 9 (2012), 10 (2014), 11, 12, 13, 14