THPDFPDFMACChainValidationInfo Record
Failure gives the chain failure code and Message carries the human-readable explanation
RevisionCount, FirstMACRevisionIndex, ValidatedRevisionCount, FailureRevisionIndex and FailureXRefOffset locate the validated range and the failure position
PermissionProtectedFromFirstRevision, KDFSaltStable and DigestStrengthMonotonic report chain-wide properties
Revisions lists per-revision validation results