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to provide sustainable, trustworthy environments in which digital assets are preserved and, when appropriate, made accessible through persistent identifiers; for additional information see the Identifier documentation
to provide bit-level preservation to all deposited objects and associated metadata
to satisfy the requirements of funding agencies in managing, sharing and preserving research data
to verify and demonstrate authenticity of all deposited objects and metadata
to, whenever possible, maintain citability of accessible materials
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This policy covers all materials selected for inclusion in the Duke Digital Repositories and as defined in individual repository collection policies. This policy applies for the intended duration of stewardship for each collection. These policies are subject to change by the Duke University Libraries and are not specific to systems or software implementation.
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Fixity checking and version control
- Bit-level preservation will be provided to all digital objects in the repositories
Depositors may submit fixity information along with objects to validate against during ingest. Fixity checks are performed by the repository at regular intervals.
- Objects that fail a fixity check will be restored from a backup copy
Multiple copies
Duke University Libraries maintains at least three distinct replicas of data at all times. The Libraries contracts with the campus Office of Information Technology to support data replicas. The primary copy of the data is locally-stored at Duke with a secondary, nearline copy also at Duke, and a tertiary copy on tape. Plans for an off-site, geographically distributed fourth copy are under consideration.
File formats and obsolescence management
File formats were surveyed and evaluated to create list of preferred file formats in 2019
Prior to ingest into the repository, select file formats may be migrated to formats presenting less risk
Formats that are not preferred may still be included and receive bit-level preservation
Support Provide support for descriptive, administrative, technical, and preservation metadata to ensure continued understanding of the materials
Information Security
Authorization to read, write, move and/or delete materials and metadata will be controlled
Duke University Libraries will maintain audit logs of read, write, edit, and delete actions taken and review as necessary
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