th preservation.  The Preservation Strategic Plan states how the 
mission will be achieved, in general terms with goals and objectives.  The 
Preservation Policy then declares the range of approaches that the repository will 
employ to ensure preservation (that is, to implement the Preservation Strategic 
Plan), and finally the Preservation Implementation Plan translates those into 
services that the repository must carry out.  This is an abstract documentary 
model that, in reality, can result in different