UCD Digital Library Preservation Policy
The University College Dublin Library is committed to responsible and sustainable management of digital assets held within the UCD Digital Library. It is guided in its
preservation mission by principles of trustworthiness, transparency, and digital resource curation. Its objective is to maintain durable digital assets that are secure
with regard to both stability and recoverability, that retain their usefulness and usability over time, and that are protected with respect to national and international
regulations for data protection.
UCD Digital Library is committed to bit-level preservation, i.e., preserving the bitstream (the binary form) of file assets in its digital repository. Further efforts will
be applied, where feasible, to maintain usability of file assets (e.g., preservation of intended "look and feel" of file assets) through provision of specialised interfaces and
dissemination services or file format migration.
The UCD Digital Library's long-term preservation strategy is shaped by the Open Archival Information System (OAIS) reference model (ISO 14721:2012) and informed
by relevant international standards and emerging best practices.
Efforts will be made to preserve works in any digital format submitted to UCD Digital Library, however, submission in a recommended file format is strongly encouraged in
order to facilitate long-term preservation. Please see Technical Information for a list of preferred file formats.
When files in formats other than those listed in Preferred Formats for Data are received, an evaluation will be made whether a derivative file in a more stable or a
locally preferred file format can be created. In such cases, the original file and the derivative(s) will be preserved, along with associated descriptive, administrative and
preservation metadata for both files.
UCD Digital Library provides long-term access to submitted works, as well as associated descriptive and administrative metadata, by deploying a strategy
combining the following:
- Use of standard vocabularies and schemas for the representation of descriptive, administrative, technical, preservation, and structural metadata,
including MODS, EAD, DDI, METS, and PREMIS;
- Data storage redundancy, comprising regular backups to local and offsite locations and regular verification of file integrity;
- Periodic refreshment of storage media;
- File format migration (including afore-mentioned creation of derivative files when processing Submission Information Packages)
Persistence in discoverability and in referencing digital resources is supported by assignment of a persistent URL to all resources submitted to the UCD Digital Library,
namely, a DataCite Digital Object Identifier (DOI), a CrossRef DOI, or an Archival Resource Key (ARK).
Review and Maintenance of Policy
This policy and related preservation activities will be reviewed regularly to ensure that procedures and operations remain current and compliant with international best