rail to support claims of authenticity is 
available, that unauthorized changes to the digital holdings can be detected, and that the 
digital objects can be identified and placed in their appropriate context. 
                                                 
1 The Unified Digital Formats Registry (UDFR, http://www.gdfr.info/udfr.html) and the UK 
Digital Curation Centre’s Registry Repository of Representation Information (RRORI, 
http://registry.dcc.ac.uk) are two emerging examples. 
AUDIT AND CERTIFICATI