capturing preservation metadata from institutional repositories preserv project presented by steve...
TRANSCRIPT
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Capturing preservation metadata from
institutional repositories Preserv Project
Presented by Steve HitchcockIntelligence Agents Multimedia Group,
School of Electronics and Computer Science (ECS), Southampton University
DCC Workshop on the Long-term Curation within Digital Repositories
Cambridge, 6 July 2005
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AbstractPreservation scenarios are often based on hypothetical situations, generalised applications such as digital libraries or cultural heritage organisations, or on specific applications such as digitisation. This presentation will consider the emerging but real scenario of preservation in the context of institutional repositories (IRs), being investigated by the JISC Preserv project. While on the surface this particular scenario may not seem to differ significantly from others, we will build a picture of relationships between repositories and preservation service providers to reveal what differences there may be with other scenarios and to understand the implications. We will use this analysis to inform the capture of some preservation metadata from IRs through the user deposit interface, perhaps the most critical data capture point in the IR preservation chain. Some initial ideas on formalising these IR preservation elements will be proposed for consultation, with a view to learning from, and possibly contributing to, the standard reference in this area, currently the PREMIS Working Group Data Dictionary for Preservation Metadata.
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Preserv, Capturing preservation metadata from institutional repositories, DCC, Cambridge, 6 July 2005
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Preservation
Preserv, Capturing preservation metadata from institutional repositories, DCC, Cambridge, 6 July 2005
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Preservationstorage media, media refreshing,
reformatting, backups and disaster recovery, environment, audit, security,
preservation strategy, migration, technology preservation, emulation,
records management, etc.
Preserv, Capturing preservation metadata from institutional repositories, DCC, Cambridge, 6 July 2005
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Preserv, Capturing preservation metadata from institutional repositories, DCC, Cambridge, 6 July 2005
Preservationstorage media, migration, etc.
Preserv partnerBritish Library
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Preserv, Capturing preservation metadata from institutional repositories, DCC, Cambridge, 6 July 2005
Preservationstorage media, migration, etc.
Preserv partnerBritish Library
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Preserv, Capturing preservation metadata from institutional repositories, DCC, Cambridge, 6 July 2005
Preservationstorage media, migration, etc.
Preserv partnerBritish Library
Institutional repositoryEprints.org, DSpace,
FAIR, JISC DRs
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Preserv, Capturing preservation metadata from institutional repositories, DCC, Cambridge, 6 July 2005
Preservationstorage media, migration, etc.
Preserv partnerBritish Library
Preserv partnerseprints.sotonOxford Univ.
IRs, Eprints.org, DSpace, etc.
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Preserv, Capturing preservation metadata from institutional repositories, DCC, Cambridge, 6 July 2005
Preservationstorage media, migration, etc.
Preserv partnerBritish Library
Preserv partnerseprints.sotonOxford Univ.
IRs, Eprints.org, DSpace, etc.
User/author User/reader
Deposit Access
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Preserv, Capturing preservation metadata from institutional repositories, DCC, Cambridge, 6 July 2005
Preservationstorage media, migration, etc.
Preserv partnerBritish Library
Preserv partnerseprints.sotonOxford Univ.
IRs, Eprints.org, DSpace, etc.
User/author User/reader
Deposit Access
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Preserv, Capturing preservation metadata from institutional repositories, DCC, Cambridge, 6 July 2005
Preservationstorage media, migration, etc.
Preserv partnerBritish LibraryPreservationservice providers
Preserv partnerseprints.sotonOxford Univ.
IRs, Eprints.org, DSpace, etc.
User/author User/reader
Deposit Access
Machine interface OAI
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Preserv, Capturing preservation metadata from institutional repositories, DCC, Cambridge, 6 July 2005
Preservationstorage media, migration, etc.
Preserv partnerBritish LibraryPreservationservice providers
Preserv partnerseprints.sotonOxford Univ.
IRs, Eprints.org, DSpace, etc.
User/author User/reader
Deposit Access
Machine interface OAI
“Access is still not the primary purpose of a preservation system”Cornell OAIS tutorial
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Preserv, Capturing preservation metadata from institutional repositories, DCC, Cambridge, 6 July 2005
Preservationstorage media, migration, etc.
Preserv partnerBritish LibraryPreservationservice providers
Preserv partnerseprints.sotonOxford Univ.
IRs, Eprints.org, DSpace, etc.
User/author User/reader
Deposit Access
Machine interface OAI
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Preserv, Capturing preservation metadata from institutional repositories, DCC, Cambridge, 6 July 2005
Preservationstorage media, migration, etc.
Preserv partnerBritish LibraryPreservationservice providers
Preserv partnerseprints.sotonOxford Univ.
IRs, Eprints.org, DSpace, etc.
User/author User/reader
Deposit Access
M I/F(OAI)
M I/F
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Preserv, Capturing preservation metadata from institutional repositories, DCC, Cambridge, 6 July 2005
Preservationstorage media, migration, etc.
Preserv partnerBritish LibraryPreservationservice providers
Preserv partnerseprints.sotonOxford Univ.
IRs, Eprints.org, DSpace, etc.
User/author User/reader
Deposit Access
Machine interface OAI
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Preserv, Capturing preservation metadata from institutional repositories, DCC, Cambridge, 6 July 2005
Preservationstorage media, migration, etc.
Preserv partnerBritish Library Preservationservice providers
Preserv partnerseprints.sotonOxford Univ.
IRs, Eprints.org, DSpace, etc.
User/author User/reader
Deposit Access
Machine interface OAIIR authordeposit interface
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Preserv, Capturing preservation metadata from institutional repositories, DCC, Cambridge, 6 July 2005
Preservationstorage media, migration, etc.
Preserv partnerBritish LibraryPreservationservice providers
Preserv partnerseprints.sotonOxford Univ.
IRs, Eprints.org, DSpace, etc.
User/author User/reader
Deposit Access
Machine interface OAIIR authordeposit interface
“It is important to build the concept of preservation from the outset" (JISC Circular 4/04)
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Preserv, Capturing preservation metadata from institutional repositories, DCC, Cambridge, 6 July 2005
Preservationstorage media, migration, etc.
Preserv partnerBritish LibraryPreservationservice providers
Preserv partnerseprints.sotonOxford Univ.
IRs, Eprints.org, DSpace, etc.
User/author User/reader
Deposit Access
Machine interface OAIEprintsdeposit interface
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Preserv, Capturing preservation metadata from institutional repositories, DCC, Cambridge, 6 July 2005
Preservationstorage media, migration, etc.
Preserv partnerBritish LibraryPreservationservice providers
Preserv partnerseprints.sotonOxford Univ.
IRs, Eprints.org, DSpace, etc.
User/author User/reader
Deposit Access
Machine interface OAIEprintsdeposit interface
Contents of IRsMany types of digital objects, formatsVersioning issues, some duplicationDifferent degrees of moderation: institutional membership is selection baseline
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Preserv, Capturing preservation metadata from institutional repositories, DCC, Cambridge, 6 July 2005
Preservationstorage media, migration, etc.
Preserv partnerBritish LibraryPreservationservice providers
Preserv partnerseprints.sotonOxford Univ.
IRs, Eprints.org, DSpace, etc.
User/author User/reader
Deposit Access
Machine interface OAIIR authordeposit interface
Format
Format IDTNA +Pronom
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Preserv, Capturing preservation metadata from institutional repositories, DCC, Cambridge, 6 July 2005
Preservationstorage media, migration, etc.
Preserv partnerBritish LibraryPreservationservice providers
Preserv partnerseprints.sotonOxford Univ.
IRs, Eprints.org, DSpace, etc.
User/author User/reader
Deposit Access
Machine interface OAIIR authordeposit interface
Format
Format IDTNA +Pronom
Influence/feedback
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Preserv, Capturing preservation metadata from institutional repositories, DCC, Cambridge, 6 July 2005
Preservationstorage media, migration, etc.
Preserv partnerBritish LibraryPreservationservice providers
Preserv partnerseprints.sotonOxford Univ.
IRs, Eprints.org, DSpace, etc.
User/author User/reader
Deposit Access
Machine interface OAIIR authordeposit interface
Format
Format IDTNA +Pronom
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Preserv, Capturing preservation metadata from institutional repositories, DCC, Cambridge, 6 July 2005
Preservationstorage media, migration, etc.
Preserv partnerBritish LibraryPreservationservice providers
Preserv partnerseprints.sotonOxford Univ.
IRs, Eprints.org, DSpace, etc.
User/author User/reader
Deposit Access
Machine interface OAIIR authordeposit interface
Format
Format IDTNA +Pronom
• Users• IR managers and admins• Heads of institutions• Research funders• Course leaders• Teachers• Education funders
Stakeholders
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Connecting IRs (content providers) and preservation services
• How far can we apply the OAIS model across our IR-preservation model?
• How can we embrace preservation metadata in this model?
• To what extent do these apply just to the preservation component?
It looks as if many of the ideas focus on the preservation archive rather than the content provider
• How can we connect content providers with preservation services?
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“Preservation metadata is seldom shared across organizations”
Clifford Lynch "there has been some useful work done on metadata standards for preservation, although that work is not highly advanced. Part of the problem is that a lot of the work on preservation metadata has given rise to organizational guidance, the kinds of things you should think about as you attach metadata to objects when you want to preserve them, rather than hard specifics that would be more typical in interchange format, because preservation metadata today is seldom shared across organizations.“* Since this talk was given there has been a great deal of progress in relevant areas here. I would point the interested reader at the work on METS, PREMIS, and the NISO Still Image Technical Metadata draft standard Preserving Digital Documents: Choices, Approaches, and Standards, Law Library Journal, 96 (4), 2004
http://www.aallnet.org/products/2004-40.pdf
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Preserv, Capturing preservation metadata from institutional repositories, DCC, Cambridge, 6 July 2005
OAIS model
This model is not very different from the schematic sketched for Preserv, especially in terms of the core components – Ingest, Data Management, Archival Store, Access – but how effectively can OAIS be applied across different organisations?
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Preserv, Capturing preservation metadata from institutional repositories, DCC, Cambridge, 6 July 2005
Preservationstorage media, migration, etc.
Preserv partnerBritish LibraryPreservationservice providers
Preserv partnerseprints.sotonOxford Univ.
IRs, Eprints.org, DSpace, etc.
User/author User/reader
Deposit Access
Machine interface OAIIR authordeposit interface
Format
Format IDTNA +Pronom
• Users• IR managers and admins• Heads of institutions• Research funders• Course leaders• Teachers• Education funders
Stakeholders
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Preserv, Capturing preservation metadata from institutional repositories, DCC, Cambridge, 6 July 2005
Ingest relies upon rules established to determine the metadata that must be present, the formats that are acceptable, the means that may be used for transferring objects, and the quality checks that must be performed
Archival Storage functions are like storage functions that are performed in all kinds of digital storage environments, whether long-term preservation is a goal or not. The difference lies in the added rigor in error checking, media replacement, and disaster recovery.
Data management provides the glue for the system by capturing and managing all of the metadata that is needed to operate the system. As in Archival Storage, the functions of Data Management are familiar to anyone who has worked with production databases.
Access in OAIS may provide objects to an intermediary system that then interacts directly with users, or it may deliver directly to users.
Access is still not the primary purpose of a preservation system.
From Digital Preservation Management, 4B. The OAIS Reference Model. A Cornell tutorial http://www.library.cornell.edu/iris/dpworkshop/working/index.html
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OAIS information model: AIP
• Archival Information Package (AIP):– Content Information
• Original target of preservation• Information Object (Data Object & Representation Information)
– Preservation Description Information (PDI) • Other information (metadata) "which will allow the understanding
of the Content Information over an indefinite period of time“
From Michael Day, Categories, uses and challenges of metadata and process documentation
http://www.ukoln.ac.uk/preservation/presentations/2005/delos-summerschool/slides.ppt
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OAIS information model: PDI
PreservationDescriptionInformation
Reference Information
ProvenanceInformation
ContextInformation
FixityInformation
PDI Preservation Description Information (Figure 4-16)
From Michael Day, Categories, uses and challenges of metadata and process documentation
http://www.ukoln.ac.uk/preservation/presentations/2005/delos-summerschool/slides.ppt
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A suggestion
• PDI – or somewhere - ought also to indicate what you want to do with the object, and perhaps act as the basis of selection for preservation services. What isn't clear is how these features could be incorporated.
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Preservation metadata
PREMIS = Preservation Metadata: Implementation Strategies
Preservation metadata = "the information a repository uses to support the digital preservation process"
The PREMIS Data Dictionary for Preservation Metadata (May 2005)
http://www.oclc.org/research/projects/pmwg/
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PREMIS data model
Intellectual entities
Objects
Events
Rights
Agents
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PREMIS Data Dictionary, v 1.0
• Defines semantic units for Objects, Events, Agents and Rights– Object: objectIdentifier, preservationLevel, objectCategory,
objectCharacteristics (format, significant properties, etc.), creatingApplication, storageMedium, environment (dependencies, hardware and software details, etc), relationship, …
– Event: eventIdentifier, eventType (from a controlled list, e.g. ingestion, migration, normalization), eventDateTime, eventDetail, eventOutcomeInformation, linkingAgentIdentifier, …
– Agent: agentIdentifier, agentName, agentType, …– Rights: permissionStatement, …
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Limits to scope of PREMIS dictionary
– Does not focus on descriptive metadata• Domain specific and dealt with by many other
schemes
– Does not deal with technical metadata for all different types of digital file (left to format experts)
– Does not consider in detail the business rules of a repository, e.g. roles, policies, and strategies (but this could be added to data model)
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Resonance
Points raised by PREMIS that have resonance for Preserv are:
• "Questions about business plans, policies, preservation strategies, as well as metadata"
• "Recognition of the need for automatic capture of metadata
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Some questions
• Is there a need or scope for Preserv to describe semantic units within the PREMIS data dictionary that may be relevant to preservation metadata for IRs?
• Is what we need already included? For example, might the result of interaction with Pronom produce data residing in the Object entity (but noting PREMIS "Does not deal with technical metadata)?
• Which other entities might we contribute to? Events is one possibility. It's possible that some information we'd like to capture, e.g. funder, might fall within the scope of the Intellectual entity, which is outside the scope of PREMIS.
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Preserv, Capturing preservation metadata from institutional repositories, DCC, Cambridge, 6 July 2005
Preservationstorage media, migration, etc.
Preserv partnerBritish LibraryOther preservationservice providers
Preserv partnerseprints.sotonOxford Univ.
IRs, Eprints.org, DSpace, etc.
User/author User/reader
Deposit Access
Machine interface OAIIR authordeposit interface
Format
Format IDTNA +Pronom
• Users• IR managers and admins• Heads of institutions• Research funders• Course leaders• Teachers• Education funders
Stakeholders
Q. Preservation metadataor Selection metadata?
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Preservation metadata or selection metadata?
Who are the key stakeholders in selecting materials to preserve?
Institutions – selection by admission to IR, or other criteria?
Research funders – preserve outputs of a funded programme
Authors – objective or subjective?Preservation business models for IRs: perhaps the
answer lies in who pays?
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Credits
• Southampton University Les Carr, Tim Brody, Jessie Hey, Steve Hitchcock
• British Library Richard Boulderstone, Adam Farquhar, Richard Masters
• National Archives Adrian Brown• Oxford University David Price, Frances Boyle,
Neil Jefferies, Michael Popham