Hi Chella,

As per my understanding, these structure will be filled only when you download something related to Product Modelling from SAP ECC. I searched SAP Documentation and found a couple of links which might provide you with some pointers.

Modeling Configurable Products

Also, I found a thread in SDN which might provide some more inputs - http://scn.sap.com/thread/106501

Hope this helps.

Best Regards,
Samantak Chatterjee.