 created 
by the repository. The level of precision in these specifications will vary with the nature of 
the repository’s collection policy and its relationship with creators. For instance, repositories 
engaged in Web harvesting, or those that rescue digital materials long after their creators 
have abandoned them, cannot impose conditions on the creators of material, since they are 
not ‘depositors’ in the usual sense of the word. But Web harvesters can, for instance, decide 
which metadata elements from