188.8.131.52.4 - The repository shall be able to provide a complete list of all such identifiers and do spot checks for duplications.
SP can provide a complete list of all identifiers upon request. Spot checks are not necessary because the automatic identifier generation process does not allow duplication. Please see 184.108.40.206 and 220.127.116.11.1 for more information about the creation of unique identifiers.
Digital Preservation Policy Librarian