14. The system of claim 1 , wherein the DCF comprises plural elements and wherein at least a portion of the elements is lockable to prevent extraction from the DCF.
14. The system of claim 1 , wherein the DCF comprises plural elements and wherein at least a portion of the elements is lockable to prevent extraction from the DCF. 16. The system of claim 14 , wherein at least a portion of the elements in the DCF includes metadata.