previous criteria will satisfy this one without needing to demonstrate anything 
more. As a separate requirement, it demonstrates the importance of being able to audit the 
integrity of the collection as a whole. For example, if a repository claims to have all e-mail 
sent or received by The Yoyodyne Corporation between 1985 and 2005, it has been required 
to show that: 
– the content it holds came from Yoyodyne’s e-mail servers; 
– it is all correctly transformed into a preservation format; 
– each monthly