Developing practical approaches to active preservation

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Developing practical approaches to active
preservation
Adrian Brown Head of Digital Preservation The
National Archives
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• Introduction

• Active preservation

• Data model

• Characterisation

• Preservation planning

• Preservation action

• PRONOM

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Previous work

• National Digital Archive of Datasets (1997)
• PRONOM (2002)
• TNA Digital Archive (2004)
• Web archiving programme (2004)
• Electronic Records Online (2005)

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Current developments

• Seamless Flow programme (2004-2007)
• JISC projects (2004 onwards)
• PLANETS (2006-2010)
• Shared preservation services for UK Government
  (2006-?)

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Preservation management

• Passive preservation
• Preserving the bits
• Digital Object Store (enhanced Digital Archive)
• Active preservation
• Preserving the record
• Active Preservation system (incorporating PRONOM)

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• Introduction

• Active preservation

• Data model

• Characterisation

• Preservation planning

• Preservation action

• PRONOM

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Active preservation

• Service-oriented architecture
• All services exposed as web services (local or
  remote)
• Developed using J2EE
• Lightweight pluggable framework to use new and
  existing TNA and third-party tools
• Orchestrated using workflow engine
• Scheduled for completion by end of 2007

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• Introduction

• Active preservation

• Data model

• Characterisation

• Preservation planning

• Preservation action

• PRONOM

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• Introduction

• Active preservation

• Data model

• Characterisation

• Preservation planning

• Preservation action

• PRONOM

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Characterisation

• Identification
• Format version expressed as PUID
• Validation
• Well-formed syntactically correct
• Valid well-formed and semantically correct
• Property extraction
• Technical properties
• Inherent properties

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Significant properties

• Research and collaboration
• InterPares
• InSPECT
• PLANETS
• NARA

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Characterisation tools

• Automated deployment via PRONOM
• DROID 2.0 Identification
• JHOVE Validation and property extraction
• Java POI library Validation and property
  extraction (MS Office documents)
• Java JAXP API Validation (XML)
• PLANETS characterisation tools

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• Introduction

• Active preservation

• Data model

• Characterisation

• Preservation planning

• Preservation action

• PRONOM

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Preservation planning

• Risk-based approach
• Supports preservation and presentation
• Two types of risk considered
• Format risk arising from generic properties of
  the format
• Instance risk arising from specific properties
  of the object

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Preservation planning

• Risk assessment
• Identifies urgency of action, assessed against
  standard criteria stored in registry
• Technology watch
• Monitors technological change
• Updates registry accordingly
• Results in updated risk assessment criteria

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Preservation planning

• Impact assessment
• Monitors ongoing risk
• Quantifies impact on the collection
• Migration pathway generation
• Identifies possible migration pathways through
  analysis of registry
• Tests and certifies pathways

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• Introduction

• Active preservation

• Data model

• Characterisation

• Preservation planning

• Preservation action

• PRONOM

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Preservation action

• Lightweight framework for automated deployment of
  migration tools via PRONOM
• Execution perform migration
• Characterisation characterise migrated objects
• Validation automated comparison of significant
  properties

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Migration tools

• Stellent Transformation Server
• XML Export
• HTML Export
• PDF/A (forthcoming)
• ODF (forthcoming)
• TNA migration validation tool

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• Introduction

• Active preservation

• Data model

• Characterisation

• Preservation planning

• Preservation action

• PRONOM

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PRONOM

• PRONOM 6 (Spring 2007)
• Enhanced characterisation support
• Risk assessment service
• Migration pathway development
• SOAP/REST interfaces
• PUID resolution service
• Research Preserv and ROAR
• Collaboration GDFR and DCC RIRR

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Conclusions

• Core components of active preservation system
  operational by end of 2007
• Enhanced PRONOM public web services
• Compatibility with PLANETS to allow future
  extensibility

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