| http://www.w3.org/ns/prov#value | - 1. carrying a forensic tracking code to track the document to its printer, creator, or other source device or person; 2. carrying an index to a database with more information or programmatic actions to be associated with or performed on the document; 3. carrying a hash or other authentication data used to cross check other information derived from the document to detect and locate changes made to
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