Preservation Metadata: Implementation Strategies (PREMIS) Rebecca Guenther Library of Congress IS&T Archiving Conference April 28, 2005

Preservation Metadata: Implementation Strategies Apr. 28, 2005IS&T Archiving Conference 2005 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

Preservation Metadata: Implementation Strategies Apr. 28, 2005IS&T Archiving Conference 2005 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

Preservation Metadata: Implementation Strategies Apr. 28, 2005IS&T Archiving Conference 2005 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

Preservation Metadata: Implementation Strategies Apr. 28, 2005IS&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

Preservation Metadata: Implementation Strategies Apr. 28, 2005IS&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

Preservation Metadata: Implementation Strategies Apr. 28, 2005IS&T Archiving Conference 2005 Implementation Survey Report State of the art in Winter, 2003/ libraries, 7 archives, 3 museums, and 11 other 13 different countries; 45% from U.S. 38% in planning; 33% development; 46% production

Preservation Metadata: Implementation Strategies Apr. 28, 2005IS&T Archiving Conference 2005 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

Preservation Metadata: Implementation Strategies Apr. 28, 2005IS&T Archiving Conference 2005 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

Preservation Metadata: Implementation Strategies Apr. 28, 2005IS&T Archiving Conference 2005 Core Elements Mission: Define a core set of implementable preservation metadata elements.

Preservation Metadata: Implementation Strategies Apr. 28, 2005IS&T Archiving Conference 2005 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.

Preservation Metadata: Implementation Strategies Apr. 28, 2005IS&T Archiving Conference 2005 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

Preservation Metadata: Implementation Strategies Apr. 28, 2005IS&T Archiving Conference 2005 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

Preservation Metadata: Implementation Strategies Apr. 28, 2005IS&T Archiving Conference 2005 Core Elements: Data Model

Preservation Metadata: Implementation Strategies Apr. 28, 2005IS&T Archiving Conference 2005 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

Preservation Metadata: Implementation Strategies Apr. 28, 2005IS&T Archiving Conference 2005 Sample data dictionary entry

Preservation Metadata: Implementation Strategies Apr. 28, 2005IS&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

Preservation Metadata: Implementation Strategies Apr. 28, 2005IS&T Archiving Conference 2005 objectCharacteristics compositionlevel fixity size format significantProperties inhibitors

Preservation Metadata: Implementation Strategies Apr. 28, 2005IS&T Archiving Conference 2005 Semantic units pertaining to Events eventIdentifier eventType eventDateTime eventDetail eventOutcome eventOutcomeDetail linkingAgentIdentifier linkingObjectIdentifier

Preservation Metadata: Implementation Strategies Apr. 28, 2005IS&T Archiving Conference 2005 Semantic units pertaining to Agents agentIdentifier agentName agentType

Preservation Metadata: Implementation Strategies Apr. 28, 2005IS&T Archiving Conference 2005 Semantic units pertaining to Rights permissionStatement permissionStatementIdentifier relatedObject grantingAgent grantingAgreement permissionGranted act restriction termOfGrant permissionNote

Preservation Metadata: Implementation Strategies Apr. 28, 2005IS&T Archiving Conference 2005 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

Preservation Metadata: Implementation Strategies Apr. 28, 2005IS&T Archiving Conference 2005 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

Preservation Metadata: Implementation Strategies Apr. 28, 2005IS&T Archiving Conference 2005 For More Information: PREMIS Web Site Implementing Metadata in Digital Preservation Systems: The PREMIS Activity D-Lib (April 04) RLG DigiNews October 2004 and December 2004 issues Priscilla Caplan: Rebecca Guenther: