77a8603f_ervation__Library_of_Congress___Definition
[Term] Restricted Use [Definition] 
A category of digital content restricted for any number of reasons including copyright restrictions, donor agreements, security clearance, presence of personally identifying information (PII), or simply that the content is intended for internal use only.
NDSA Levels of Preservation Glossary - National Digital Stewardship Alliance - Digital Preservation (Library of Congress)
Definition