Unit 7: Digital Preservation and Storage

Digital Preservation and Storage are critical components of records retention and disposal. The following key terms and vocabulary are essential for understanding the concepts and best practices in this field:

1. Digital Preservation: Digital preservation is the active management of digital assets to ensure their long-term access, usability, and authenticity. It involves various activities, including migration, emulation, and metadata creation. 2. Migration: Migration is the process of transferring digital assets from one format or system to another to ensure their continued accessibility and usability. It is a proactive approach to digital preservation that helps to mitigate the risks associated with technological obsolescence. 3. Emulation: Emulation is the process of replicating the functionality of a legacy system or software application to ensure the continued accessibility of digital assets. It is a more complex and resource-intensive approach than migration but can be more effective in preserving the original context and functionality of digital assets. 4. Metadata: Metadata is data that describes and contextualizes digital assets. It includes information about the content, format, creation, and provenance of digital assets. Metadata is essential for digital preservation as it helps to ensure the authenticity, discoverability, and usability of digital assets. 5. Authenticity: Authenticity refers to the reliability and trustworthiness of digital assets. It involves ensuring that digital assets are complete, accurate, and unaltered, and that their origin and context are well-documented. 6. Format Migration: Format migration is a type of migration that involves changing the file format of digital assets to ensure their continued accessibility and usability. It is typically used for digital assets that are at risk of becoming obsolete or unreadable due to changes in technology or software. 7. Characterization: Characterization is the process of analyzing and describing the technical and semantic characteristics of digital assets. It involves identifying the file format, size, structure, and content of digital assets, as well as any associated metadata. 8. Fixity: Fixity refers to the unchanged nature of digital assets. It involves the use of checksums or other algorithms to ensure that digital assets have not been altered or corrupted over time. 9. Normalization: Normalization is the process of converting digital assets to a standardized format to facilitate their management, preservation, and access. It involves the removal of redundant or irrelevant data, the addition of metadata, and the application of consistent naming conventions. 10. Obsolescence: Obsolescence refers to the loss of functionality or accessibility of digital assets due to changes in technology or software. It is a significant risk factor in digital preservation, as it can result in the loss of valuable information and knowledge. 11. Redundancy: Redundancy refers to the duplication of digital assets to ensure their availability and accessibility in the event of a failure or loss. It involves the storage of digital assets in multiple locations or on multiple systems. 12. Refreshing: Refreshing is the process of copying digital assets from one storage medium to another to ensure their longevity and accessibility. It involves the transfer of digital assets from aging or failing storage devices to new or more reliable ones. 13. Vaulting: Vaulting is the storage of digital assets in a secure and controlled environment to ensure their long-term preservation and access. It involves the use of specialized hardware and software systems designed to protect digital assets from physical damage, theft, or unauthorized access. 14. Auditing: Auditing is the process of monitoring and evaluating digital preservation activities to ensure their effectiveness and compliance with best practices and standards. It involves the use of metrics, checklists, and other tools to assess the quality, completeness, and accuracy of digital assets and their associated metadata. 15. Trustworthy Repositories: Trustworthy repositories are digital preservation systems that meet specific criteria for reliability, security, and sustainability. They are designed to ensure the long-term accessibility and usability of digital assets, and are typically certified by independent organizations or agencies.

Challenges in Digital Preservation and Storage:

Digital preservation and storage present several challenges, including:

1. Technological Obsolescence: Technological obsolescence is the rapid pace of technological change, which can make digital assets inaccessible or unreadable over time. This challenge can be mitigated through migration, emulation, and other digital preservation strategies. 2. Metadata Creation and Management: Metadata creation and management can be time-consuming and resource-intensive. It requires expertise in various domains, including content creation, data modeling, and taxonomy development. 3. Data Integrity and Authenticity: Ensuring the integrity and authenticity of digital assets can be challenging due to the ease of alteration or manipulation of digital data. This challenge can be addressed through the use of checksums, digital signatures, and other fixity tools. 4. Storage Capacity and Cost: Digital preservation requires significant storage capacity, which can be expensive and challenging to manage. This challenge can be mitigated through the use of cloud storage, data compression, and other storage optimization strategies. 5. Legal and Ethical Considerations: Digital preservation and storage raise legal and ethical questions related to privacy, intellectual property, and cultural heritage. These considerations require careful attention to legal and ethical frameworks, as well as the development of policies and procedures to ensure compliance.

Example of Digital Preservation and Storage:

The National Library of New Zealand has developed a comprehensive digital preservation and storage program to ensure the long-term accessibility and usability of its digital collections. The program includes various activities, including:

1. Metadata Creation: The library creates metadata for digital assets using standardized metadata schemas and ontologies. The metadata includes information about the content, format, creation, and provenance of digital assets. 2. Format Migration: The library migrates digital assets to new formats to ensure their continued accessibility and usability. The migration is based on a risk assessment that considers the likelihood and impact of format obsolescence. 3. Characterization: The library characterizes digital assets using various tools and techniques, including file format identification, file size analysis, and content analysis. 4. Fixity: The library ensures the fixity of digital assets using checksums and other fixity tools. The checksums are calculated at regular intervals to ensure the integrity and authenticity of digital assets. 5. Normalization: The library normalizes digital assets to a standardized format to facilitate their management and access. The normalization involves the removal of redundant or irrelevant data, the addition of metadata, and the application of consistent naming conventions. 6. Redundancy: The library stores digital assets in multiple locations and on multiple systems to ensure their availability and accessibility. The redundancy is based on a risk assessment that considers the likelihood and impact of system failure or data loss. 7. Refreshing: The library refreshes digital assets by copying them from aging or failing storage devices to new or more reliable ones. The refreshing is based on a maintenance schedule that considers the lifespan and reliability of storage devices. 8. Vaulting: The library stores digital assets in a secure and controlled environment to ensure their long-term preservation and access. The vaulting involves the use of specialized hardware and software systems designed to protect digital assets from physical damage, theft, or unauthorized access. 9. Auditing: The library monitors and evaluates digital preservation activities to ensure their effectiveness and compliance with best practices and standards. The auditing involves the use of metrics, checklists, and other tools to assess the quality, completeness, and accuracy of digital assets and their associated metadata.

Conclusion:

Digital preservation and storage are essential components of records retention and disposal. Understanding the key terms and vocabulary in this field is critical for ensuring the long-term accessibility and usability of digital assets. The challenges in digital preservation and storage require careful attention to technical, legal, and ethical considerations, as well as the development of policies and procedures to ensure compliance. The example of the National Library of New Zealand demonstrates the importance of a comprehensive digital preservation and storage program in ensuring the long-term accessibility and usability of digital collections.