Preservation Metadata: Implementation Strategies (PREMIS)

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Preservation Metadata Implementation
Strategies(PREMIS)

• Rebecca Guenther
• Library of Congress
• rgue_at_loc.gov
• IST Archiving Conference
• April 28, 2005

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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

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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_fram
  ework.pdf

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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

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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

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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

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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

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Survey findings

• Little experience with digital preservation
• Most didnt 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

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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

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Core Elements

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

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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.

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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

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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

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Core Elements Data Model
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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

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Sample data dictionary entry
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Semantic units pertaining to objects

• objectIdentifier
• preservationLevel
• objectCategory
• objectCharacteristics
• creatingApplication
• originalName
• Storage
• environment

• signatureInformation
• relationship
• linkingEventIdentifier
• linkingIntellectual Entity Identifier
• linkingPermission StatementIdentifier

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objectCharacteristics

• compositionlevel
• fixity
• size
• format
• significantProperties
• inhibitors

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Semantic units pertaining to Events

• eventIdentifier
• eventType
• eventDateTime
• eventDetail
• eventOutcome
• eventOutcomeDetail
• linkingAgentIdentifier
• linkingObjectIdentifier

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Semantic units pertaining to Agents

• agentIdentifier
• agentName
• agentType

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Semantic units pertaining to Rights

• permissionStatement
• permissionStatementIdentifier
• relatedObject
• grantingAgent
• grantingAgreement
• permissionGranted
• act
• restriction
• termOfGrant
• permissionNote

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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

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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

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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_ID12081
• Priscilla Caplan pcaplan_at_ufl.edu
• Rebecca Guenther rgue_at_loc.gov