correctness. It can mean simply checking that file formats are what they claim to be (TIFF 
files are valid TIFF format, for instance), or can imply checking the content. This might 
involve human checking in some cases, such as confirming that the description of a picture 
matches the image. This allows the repository to demonstrate that its preserved objects have 
completely and correctly copied what it intended to copy from the SIPs. It also allows the 
repository to document reasons for other SIP-relate