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Valid: the size of the HEAD version of the datastream in OCFL recorded in <DSID>.nt matches the size of the OCFL file on disk
Validate: datastream checksum 
Valid: the algorithm type and checksum value of the datastream recorded in the HEAD version of OCFL <DSID>.nt metadata file matches the type and value of the checksum for the datastream in the Fedora 3 repository
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Valid: each datastream version in the OCFL object has a corresponding version in the Fedora 3 repository, as determined by matching the datastream creationDate recorded in the OCFL version <DSID>.nt file to a datastream version creationDate in the Fedora 3 repository
Only validate the HEAD (ie most recent version)
Command line flag for disabling non-head version checks.
Other Requirements
Report
The results of a validation should provide a report that allows the user to understand an overall summary of the results, lists of error types by count, the list of objects by error type, summary of errors by object and detailed validation logs by object.
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