 be compared with tests on the SIP. Such tests might be simple 
(counting the number of records in a file, or performing some simple statistical measure), but 
they might be complex. Documentation should describe how the completeness and 
correctness of AIPs is ensured, starting with receipt from the producer and continuing 
through AIP creation and supporting long-term preservation. Example approaches include 
the use of checksums, testing that checksums are still correct at various points during ingest 
a