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Records Authority
Category: Digital Preservation

Digital Preservation

Simply put

Digital preservation is the ongoing effort to keep digital information accessible and usable over long periods of time, well beyond the lifespan of the systems and formats in which it was originally created. It involves managing digital materials carefully and consistently so that they remain readable and reliable as technology changes. It is best understood as a continuing set of activities rather than a one-time task.

Formal definition

Digital preservation is a formal, ongoing process comprising a coordinated set of activities aimed at ensuring that digital information of continuing value remains accessible and usable over the long term. In practice it typically encompasses functions such as content ingest, monitoring, and reporting, and requires deliberate, consistent management of digital assets with attention to detail. As characterized in the evidence, it is a distributed and continuing effort rather than a single action; specific technical strategies (for example, format management or integrity monitoring) and their relationship to authenticity, reliability, and usability requirements will depend on organizational policy, and the evidence provided does not specify them in detail.

Why it matters

Digital information is inherently fragile in ways that physical records are not. The systems, software, and file formats used to create digital materials evolve continually, and materials that are readable today may become inaccessible as the technologies they depend on are superseded or retired. Digital preservation matters because, without deliberate and continuing intervention, records of continuing value can become effectively lost even while the underlying bits still exist. Records professionals treat this as a distinct challenge from routine storage or backup, since preservation is concerned with sustained accessibility and usability over the long term rather than short-term availability.

For organizations, the stakes are both evidential and operational. Where digital materials serve as records, that is, as evidence of activity, their long-term reliability and usability underpin accountability, compliance, and institutional memory. In many jurisdictions and sectors, obligations to retain certain records for extended or permanent periods mean that preservation is not optional but a governance responsibility, though the specific requirements depend heavily on jurisdiction and organizational policy. Institutions such as the Library of Congress have established sustained programs, including its National Digital Information Infrastructure and Preservation Program, reflecting the recognition that preservation of digital materials requires ongoing, coordinated attention rather than a one-time effort.

It is worth emphasizing that digital preservation is best understood as an investment in properly managing digital assets with consistency and attention to detail, as characterized by the Digital Preservation Coalition. The cost of neglect is often invisible until access is actually needed, at which point remediation may be difficult or impossible. This makes preservation a matter of foresight and continuing commitment rather than reactive recovery.

Who it's relevant to

Records managers and archivists
Those responsible for records of continuing value must ensure that digital materials remain accessible and usable well beyond the lifespan of their original systems and formats. Preservation is directly relevant where retention obligations extend over long or indefinite periods, and it sits alongside, but is distinct from, disposition and routine storage activities.
Information governance and compliance leads
Because sustained accessibility of digital records underpins accountability and evidential value, those overseeing governance and compliance frameworks have an interest in ensuring that preservation is treated as an ongoing, resourced responsibility. The precise obligations that drive preservation decisions typically depend on jurisdiction, sector, and organizational policy.
Cultural and memory institutions
Libraries, archives, and similar bodies, such as the Library of Congress, which runs a distributed preservation program including content ingest, monitoring, and reporting, carry mandates to keep digital materials usable over time. Preservation is central to their custodial function rather than an ancillary task.
IT and digital asset custodians
Staff who manage the systems on which digital materials reside contribute to preservation through consistent, detailed management of digital assets. Their role is important to distinguish from short-term availability and backup, since preservation is concerned with sustained accessibility and usability across technological change.

Inside Digital Preservation

Bitstream Preservation
The foundational activity of ensuring that the underlying sequence of bits comprising a digital object remains intact and unaltered over time. This typically involves fixity checks, integrity monitoring, redundant storage, and error detection so that the object retains its integrity, one of the properties that distinguishes an authoritative record from a corrupted or altered copy.
Format Management and Migration
The ongoing management of file formats to guard against technological obsolescence, often through migration to more sustainable or current formats. Depending on organizational policy, this may prioritize open, well-documented formats. Migration carries risks to authenticity and content, so it is typically governed by documented procedures.
Emulation
An alternative or complementary strategy to migration in which the original operating environment, software, or hardware behavior is recreated so that a digital object can be rendered in something close to its original form. Its suitability depends on the object type and preservation objectives.
Metadata and Provenance
Structured information that supports the usability, reliability, and authenticity of preserved objects over time, including technical, descriptive, and preservation metadata as well as provenance documenting the object's history, custody, and any changes applied. Provenance is often essential to demonstrating that a preserved item remains an authoritative record.
Storage and Redundancy
The infrastructure and management practices for holding preserved objects, commonly involving multiple copies, geographic distribution, and periodic media refreshment to mitigate media degradation and loss. Storage arrangements are typically shaped by risk tolerance and resource constraints.
Preservation Planning and Policy
The governance layer that sets objectives, assigns responsibilities, and defines procedures for monitoring, action, and review across the preservation lifecycle. This connects digital preservation to broader information governance and recordkeeping accountability rather than treating it as a purely technical function.
Access and Usability Over Time
The measures ensuring that preserved objects remain findable, retrievable, and interpretable for as long as they are required. Preservation is distinguished from mere storage by its focus on continued usability, not simply retention of the files.

Common questions

Answers to the questions practitioners most commonly ask about Digital Preservation.

Is digital preservation the same as backing up files?
No. Backup is a data protection measure that copies files to guard against loss or corruption over the short to medium term, typically restoring content to its original form. Digital preservation is a broader, ongoing set of activities intended to keep digital records authentic, reliable, and usable over the long term, despite technological change such as format and media obsolescence. A backup preserves the bitstream but does not by itself address whether the record will remain accessible, intelligible, or trustworthy years later, nor does it maintain the contextual and structural information that supports a record's evidential value. Backup can be one component supporting a preservation program, but it is not a substitute for it.
Does digital preservation simply mean storing records for a long time?
Not exactly. Long-term storage addresses where content is kept, but digital preservation is concerned with keeping records accessible and meaningful, not merely retained. Depending on organizational policy and jurisdiction, preservation may involve active management such as format migration, integrity checking, and maintenance of metadata that establishes authenticity and context. Retention refers to the period a record is kept to meet business, legal, or other requirements, while preservation refers to the activities that sustain a record's usability and trustworthiness across that period. A record can be stored yet effectively lost if it can no longer be opened, interpreted, or relied upon as evidence.
What is the difference between preserving the bitstream and preserving usability?
Bitstream preservation focuses on keeping the exact sequence of bits intact and verifiable over time, often through fixity checks and managed storage. Preserving usability, sometimes described as logical or content preservation, concerns whether the record can still be rendered, understood, and used as intended, which may require addressing format obsolescence through approaches such as migration or emulation. A program often needs both: an intact bitstream provides little value if no available tool can interpret it, and a usable rendering carries little evidential weight if its integrity cannot be demonstrated. The appropriate balance typically depends on the value, risk, and required retention of the material.
How does an organization decide which digital records warrant preservation effort?
Decisions are usually driven by appraisal and the record's continuing value, informed by business need, legal and regulatory requirements, and any obligations for permanent preservation or transfer to an archival authority. These requirements vary by jurisdiction and sector, so organizations often align preservation priorities with their retention and disposition schedules. Not all digital content warrants active preservation; transitory information and superseded drafts may fall outside scope, while records of enduring evidential, legal, or historical value typically justify greater investment. The level of preservation effort is commonly proportionate to the assessed value and risk associated with the records.
What role does metadata play in digital preservation?
Metadata is generally central to digital preservation because it supports the properties that make something a trustworthy record, including authenticity, reliability, integrity, and usability. Preservation metadata may document the record's provenance, structure, format, fixity information, and the history of preservation actions taken on it, such as migrations. Without adequate metadata, it can become difficult to demonstrate that a record is what it purports to be or to interpret it correctly over time. Maintaining this contextual information alongside the content is often as important as preserving the content itself, though the specific metadata required depends on organizational policy and any applicable standards or frameworks.
How do migration and emulation differ as preservation strategies?
Migration typically involves converting records from an obsolete or at-risk format to a current, more sustainable one so they remain usable with available tools, accepting that conversion may carry some risk of altering appearance, structure, or embedded functionality. Emulation instead aims to reproduce the original technical environment, so records can be rendered in something resembling their native form without changing the underlying files. Each approach has trade-offs relating to cost, fidelity, and the demonstrability of authenticity, and many programs use them selectively depending on the material and its required retention. The choice generally depends on the record's characteristics, value, and the resources and expertise available.

Common misconceptions

Digital preservation is the same as backup.
Backup typically addresses short-term recovery from data loss or system failure, whereas digital preservation is concerned with maintaining the authenticity, integrity, and usability of digital objects over the long term, including through format obsolescence and technological change. A backup alone does not guarantee that an object will remain renderable or interpretable years later.
Preserving a record permanently means simply keeping the file unchanged forever.
Because file formats, software, and hardware become obsolete, long-term preservation often requires active intervention such as migration or emulation. Doing nothing frequently results in loss of usability even where the bits themselves survive. Preservation is generally an ongoing, managed process rather than a one-time act of storage.
Digital preservation and retention are interchangeable concepts.
Retention concerns how long a record is kept, while preservation concerns the measures that keep it authentic, reliable, and usable during that period. Disposition may include permanent preservation, transfer, or destruction, so preservation typically applies to the subset of records slated for long-term or permanent keeping rather than to all retained information.

Best practices

Define a documented preservation policy that assigns responsibilities and sets objectives, linking preservation activity to broader recordkeeping and information governance accountability.
Prioritize open, well-documented, and sustainable file formats where organizational policy permits, and monitor holdings for format obsolescence over time.
Perform regular fixity and integrity checks, and maintain multiple redundant copies, ideally geographically distributed, to guard against media degradation and loss.
Capture and maintain preservation and provenance metadata so that the authenticity, reliability, and history of each object can be demonstrated over its retained life.
Select migration or emulation strategies deliberately based on the object type and preservation objectives, and govern any transformation with documented procedures to protect authenticity.
Review preservation plans periodically to account for changes in technology, formats, and organizational requirements, and validate that preserved objects remain both retrievable and interpretable.