cument is meant primarily for those responsible for auditing digital repositories and 
also for those who work in or are responsible for digital repositories seeking objective 
measurement of the trustworthiness of their repository. Some institutions may also choose to 
use these metrics during a design or redesign process for their digital repository. 
1.3 
RATIONALE 
In 1996 the Task Force on Archiving of Digital Information (reference [B1]) declared, ‘a 
critical component of digital archiving infrastruc