Hi Jesus Valero,
Its a simple same old mechanism of transport. If you still have the question What does that mean?
Ans. Currently how do you transport the meta data from Development system to production system. Same way once you install the NW BW 7.40 system transport the required objects from your development system to the new 7.40 system.
Hope this clears your doubt.
Thanks & Regards
A.Dinesh