iptive information should also document the provenance of all 
digital objects. 
4.2.4 The repository shall have and use a convention that generates persistent, unique 
identifiers for all AIPs. 
AUDIT AND CERTIFICATION OF TRUSTWORTHY DIGITAL REPOSITORIES 
CCSDS 652.0-M-1 
Page 4-10 
September 2011 
In particular the following aspects must be checked. 
4.2.4.1 The repository shall uniquely identify each AIP within the repository. 
4.2.4.1.1 The repository shall have unique identifiers. 
4.2.4.1.2 The reposi