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Preservation Metadata: Implementation Strategies (PREMIS). Rebecca Guenther Library of Congress rgue@loc.gov IS&T Archiving Conference April 28, 2005. Overview of presentation. Background to PREMIS PREMIS membership and charge Preservation repositories implementation survey

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preservation metadata implementation strategies premis

Preservation Metadata: Implementation Strategies(PREMIS)

Rebecca Guenther

Library of Congress

rgue@loc.gov

IS&T Archiving Conference

April 28, 2005

overview of presentation
Overview of presentation
  • Background to PREMIS
  • PREMIS membership and charge
  • Preservation repositories implementation survey
  • PREMIS Core elements group
    • Development of data dictionary
    • Data model
  • Next steps
  • Implementation issues

IS&T Archiving Conference 2005

oclc rlg preservation metadata framework working group
OCLC/RLG Preservation Metadata Framework Working Group
  • OCLC/RLG Preservation Metadata Working Group
    • Convened March 2000
    • Looked at CEDARS, NLA, NEDLIB, OCLC
  • Preservation metadata framework (June 2002)
    • Synthesized elements from existing sets
    • Based on OAIS information model
    • Elaboration of OAIS
    • Set of “prototype” preservation metadata elements

http://www.oclc.org/research/projects/pmwg/pm_framework.pdf

IS&T Archiving Conference 2005

premis
PREMIS
  • June 2003: OCLC/RLG sponsored new working group: PREMIS
    • Preservation Metadata: Implementation Strategies
  • Need
    • Practical and implementable, not broadly theoretical
    • Independent of specific implementation
  • Objectives
    • Define “core” set of preservation metadata elements, with supporting data dictionary, applicable to broad range of digital preservation activities
    • Identify and evaluate alternative strategies for encoding, storing, managing, and exchanging preservation metadata

IS&T Archiving Conference 2005

membership
Priscilla Caplan, FCLA (Chair)

Rebecca Guenther, LC (Chair)

Michael Alexander, British Library

George Barnum, GPO

Charles Blair, U. of Chicago

Olaf Brandt, U. of Gottingen

Adam Farquhar, British Library

David Gewirtz, Yale

Kevin Glavash, MIT/Dspace

Cathy Hartman, U. of N. Texas

Helen Hodgart, British Library

Nancy Hoebelheinrich, Stanford

Roger Howard/Sally Hubbard, Getty Museum

Pam Kircher, OCLC

John Kunze, Calif. Digital Library

Brian Lavoie, OCLC liaison

Robin Dale, RLG liaison

Vicky McCarger, LA Times

Jerry McDonough, NYU/METS

Evan Owens, JSTOR

Erin Rhodes, NARA

Madi Solomon, Walt Disney Co.

Angela Spinazze, ATSPIN

Gunter Waibel, RLG

Lisa Weber, NARA

Robin Wendler, Harvard

Hilde van Wijngaarden, KB

Andrew Wilson, NAA

Membership

IS&T Archiving Conference 2005

advisory committee
Howard Besser, UCLA

Liz Bishoff, OCLC (via Colorado Digitization Program)

Gerard Clifton, National Library of Australia

Gail Hodge, CENDI

Steve Knight, National Library of New Zealand

Maggie Jones, Digital Preservation Coalition

Nancy McGovern, Cornell

Cliff Morgan, Wiley UK

Richard Rinehart, U. of California, Berkeley

Advisory Committee

IS&T Archiving Conference 2005

implementation survey report
Implementation Survey Report
  • State of the art in Winter, 2003/2004
  • 28 libraries, 7 archives, 3 museums, and 11 other
  • 13 different countries; 45% from U.S.
  • 38% in planning; 33% development; 46% production

IS&T Archiving Conference 2005

survey findings
Survey findings
  • Little experience with digital preservation
    • Most didn’t have active preservation strategy
    • Many not yet in production
    • Cannot assess adequacy of metadata
  • Lack of common vocabulary and conceptual framework
    • Informed by OAIS reference model
    • Difference of opinion as to meaning of OAIS compliance
  • Metadata
    • Many recording rights, provenance, technical, administrative, descriptive and structural
  • Most repositories serve goals of both preservation and access

IS&T Archiving Conference 2005

trends
Trends
  • Store metadata redundantly in XML or relational database and with content data objects
  • Use METS for structural metadata and as container for descriptive and administrative; MIX for images
  • Use OAIS as framework and starting point
  • Maintain multiple versions (originals, some normalized or migrated) in repository with complete metadata for all versions
  • Choose multiple strategies for digital preservation

IS&T Archiving Conference 2005

core elements
Core Elements
  • Mission: Define a core set of implementable preservation metadata elements.

IS&T Archiving Conference 2005

core elements1
Core Elements
  • Mission: Define a core set of implementable preservation metadata elements.
    • Information that supports and documents the digital preservation process;
    • Information that supports the viability, renderability, understandability, identity and authenticity of digital objects over time.

IS&T Archiving Conference 2005

core elements2
Core Elements
  • Mission: Define a core set of implementable preservation metadata elements.
    • What most working preservation repositories are likely to need to know
    • Core does not imply mandatory

IS&T Archiving Conference 2005

core elements3
Core Elements
  • Mission: Define a core set of implementable preservation metadata elements.
    • As rigorous as possible
    • As much explanation as possible
    • Implementation neutral -- “This is what you have to know”
    • Values can be automatically supplied and processed -- no lengthy textual descriptions

IS&T Archiving Conference 2005

core elements data model
Core Elements: Data Model

IS&T Archiving Conference 2005

scope of data dictionary
Scope of data dictionary
  • Implementation independent
  • Descriptive metadata out of scope
  • Metadata about Agents is limited
  • Technical metadata applying to all or most format types
  • Media or hardware details is limited
  • Business rules are essential for working repositories, but not covered
  • Rights information for preservation actions, not access

IS&T Archiving Conference 2005

sample data dictionary entry
Sample data dictionary entry

IS&T Archiving Conference 2005

semantic units pertaining to objects
objectIdentifier

preservationLevel

objectCategory

objectCharacteristics

creatingApplication

originalName

Storage

environment

signatureInformation

relationship

linkingEventIdentifier

linkingIntellectual Entity Identifier

linkingPermission StatementIdentifier

Semantic units pertaining to objects

IS&T Archiving Conference 2005

objectcharacteristics
objectCharacteristics
  • compositionlevel
  • fixity
  • size
  • format
  • significantProperties
  • inhibitors

IS&T Archiving Conference 2005

semantic units pertaining to events
Semantic units pertaining to Events
  • eventIdentifier
  • eventType
  • eventDateTime
  • eventDetail
  • eventOutcome
  • eventOutcomeDetail
  • linkingAgentIdentifier
  • linkingObjectIdentifier

IS&T Archiving Conference 2005

semantic units pertaining to agents
Semantic units pertaining to Agents
  • agentIdentifier
  • agentName
  • agentType

IS&T Archiving Conference 2005

semantic units pertaining to rights
Semantic units pertaining to Rights
  • permissionStatement
    • permissionStatementIdentifier
    • relatedObject
    • grantingAgent
    • grantingAgreement
    • permissionGranted
      • act
      • restriction
      • termOfGrant
      • permissionNote

IS&T Archiving Conference 2005

next steps
Next steps
  • PREMIS deliverables (May 2005)
    • Data dictionary and report
    • XML schemas
    • Draft for experimentation to remain stable for a year
    • Revisions will be based on results of testing
  • Follow-up activities
    • Testbeds for implementation and exchange
    • Community outreach
    • Establish maintenance activity
    • Consider formal standardization

IS&T Archiving Conference 2005

implementation considerations
Implementation considerations
  • Schema use with specific implementations (e.g. METS)
  • Machine generation of metadata
  • Tools
  • Role of registries (format, environment)
  • Prospects for collaboration and exchanging information content
  • Rights and permissions
  • Emergence of best practices
  • Support needed from PREMIS maintenance activity

IS&T Archiving Conference 2005

for more information
For More Information:
  • PREMIS Web Site
    • www.oclc.org/research/projects/pmwg
  • “Implementing Metadata in Digital Preservation Systems: The PREMIS Activity” D-Lib (April ‘04)
    • www.dlib.org/dlib/april04/lavoie/04lavoie.html
  • RLG DigiNews October 2004 and December 2004 issues
    • www.rlg.org/en/page.php?Page_ID=12081
  • Priscilla Caplan: pcaplan@ufl.edu
  • Rebecca Guenther: rgue@loc.gov

IS&T Archiving Conference 2005