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Introduction to Digital Preservation

Introduction to Digital Preservation. Tim Au Yeung March 14, 2007. Introduction. Quick Bio Managed aspects of the digitization program at the Library for the past 8 years Member, Technical Committee, AlouetteCanada Chair, Network Infrastructure Working Group

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Introduction to Digital Preservation

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  1. Introduction to Digital Preservation Tim Au Yeung March 14, 2007

  2. Introduction Quick Bio • Managed aspects of the digitization program at the Library for the past 8 years • Member, Technical Committee, AlouetteCanada • Chair, Network Infrastructure Working Group • Researcher, AlouetteCanada Metadata Toolkit Project (CCOP funding) • Member, Technical Committee, Synergies Project (CFI funding) • Board Member, Museum Computer Network • Member, Technical Working Group, Lois Hole Campus Alberta Digital Library Digitization Committee

  3. Outline • Definition • Ways of understanding digital preservation • Current work • Future directions • Activities at the University of Calgary

  4. What is digital preservation?

  5. What is Digital Preservation? “[D]igital preservation” is defined as the managed activities necessary for ensuring both the long-term maintenance of a bytestream and continued accessibility of its contents. (RLG/OCLC, Trusted Digital Repositories: Attributes and Responsibilities)

  6. What is Digital Preservation? Managed Activities Implies: • Human action • Coordinated effort • Multiple and successive tasks

  7. What is Digital Preservation? Maintenance of Bytestream • Mechanical preservation • Digital data => physical media • Physical media => physical institutions

  8. What is Digital Preservation? Access to Content • Semantic preservation • Access implies • Findable • Viewable in current context

  9. 3 Views of Digital Preservation • The Life Cycle approach • The Systems-Responsibilities approach • The Challenges approach

  10. Life Cycle Approach Acquisition Creation Ingest Metadata Access Storage (Lifecycle Information for E-Literature Project) Preservation

  11. Systems-Responsibilities Approach From the Cornell Digital Preservation Management Tutorial

  12. The Challenges Approach “The default for digital information is not to survive…” (Howard Besser)

  13. Challenges The Viewing Problem

  14. Challenges The Scrambling Problem Compression

  15. Home Challenges The Inter-relation Problem About Search Bios Services

  16. Challenges The Custodial Problem Library 1 Library 2

  17. Challenges The Translation Problem

  18. Current Work

  19. Current Work Refreshing • Traditional IT approach to “archiving” -- copy from one media format to another • Periodic verification of data (checksums) • Media longevity analysis • Automated duplication • LOCKSS (Lots of Copies Keep Stuff Safe)

  20. Current Work Migration • Moving from one format to another format • Risk assessment (INFORM) • Format registries • Harvard Global Digital Format Registry • PRONOM • Open standards • Human readable formats

  21. Current Work Emulation • Rather than changing the records, moving the underlying environment into the new environment • CAMiLEON and the BBC Domesday project • The Universal Virtual Computer (National Library of the Netherlands and IBM) • Strengths • Mitigates the risk of working with individual items • Reduces the amount of work necessary • Critiques • Not a “living” environment

  22. Current Work Preservation Metadata • “Effective management of all but the crudest forms of digital preservation is likely to be facilitated by the creation, maintenance, and evolution of detailed metadata in support of the preservation process.” (OCLC/RLG, Preservation Metadata for Digital Objects) • Metadata for managing preservation activities (PREMIS) • Packaging for Digital Objects (METS) • Submission Information Package • Archival Information Package • Dissemination Information Package

  23. Current Work Persistent Identification • Permanent locators for access to digital objects • Uniform Resource Names (URN) • Persistent URLs (PURL) • Digital Object Identifiers (DOI) • Archival Resource Keys (ARK) • The Handle System Repository Resolver Requester

  24. Current Work Trusted Digital Repositories • Attributes • Compliance with the Reference Model for an Open Archival Information System (OAIS) • Administrative responsibility • Organizational viability • Financial sustainability • Technological and procedural suitability • System security • Procedural accountability • Certification

  25. Unexplored Areas Validation • Empirical evidence on the risk of loss • Validation of metadata elements • Effectiveness of strategies

  26. Unexplored Areas Human Factors • Situational awareness • Technology watches and obsolescence risk • Repository management • Collaboration, communication and chain of custody • Error and impact on preservation activities

  27. Activity at U. Calgary • Persistent Identification • Metadata Creation • AlouetteCanada Metadata Toolkit • Trusted Repositories • Synergies / E-Journals • Institutional Repository

  28. Questions?

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