ON OF TRUSTWORTHY DIGITAL REPOSITORIES 
CCSDS 652.0-M-1 
Page 4-13 
September 2011 
Examples of Ways the Repository can Demonstrate it is Meeting these Requirements 
Standard operating procedures; manuals describing ingest procedures; viewable 
documentation on how the repository acquires and manages Preservation Description 
Information (PDI); creation of checksums or digests, consulting with Designated Community 
about Context. 
Discussion 
PDI is needed not only by the repository to help ensure the Conte