Cedars work on metadata

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Cedars work on metadata

• Michael Day
• UKOLN, University of Bath
• m.day_at_ukoln.ac.uk
• Cedars Workshop
• Manchester, 25-26 February 2002

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Presentation overview

• Metadata and digital preservation
• Cedars work on metadata
• Metadata review
• OAIS model
• Cedars outline metadata specification
• Some related work

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Preservation metadata (1)

• Digital preservation strategies
• Technology preservation
• Emulation
• Migration
• etc ...
• All strategies depend to some extent on the
  creation and maintenance of metadata

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Preservation metadata (2)

• Within a digital repository, metadata
  accompanies and makes reference to each digital
  object and provides associated descriptive,
  structural, administrative, rights management,
  and other kinds of information. (Clifford Lynch,
  1999)
• http//www.dlib.org/dlib/september99/09lynch.html

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Cedars work on metadata

• Review of preservation metadata initiatives
  (1998)
• OAIS, PANDORA, Pittsburgh Project, RLG Working
  Group, UPF, etc.
• Draft outline metadata specification (2000)
• General framework taken from the ISO Reference
  Model for an Open Archival Information System
  (OAIS)
• http//www.leeds.ac.uk/cedars/

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The OAIS model (1)

• Reference Model for an Open Archival Information
  System (OAIS)
• Consultative Committee on Space Data Systems
  (CCSDS)
• Red Book, Issue 2 (June 2001)
• ISO DIS 14721
• High-level reference model
• a basis for conformance
• NOT a blueprint or system architecture
• http//ssdoo.gsfc.nasa.gov/nost/isoas/ref_model.ht
  ml

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The OAIS model (2)

• An OAIS
• An organisation of people and systems that have
  accepted the responsibility to preserve
  information and make it available for a
  Designated Community
• Establishes a common framework of terms and
  concepts which comprise an OAIS
• Functional model information model

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The OAIS model (3)
Preservation Planning
CONSUMER
PRODUCER
Descriptive info.
Data Management
Descriptive info.
Access
queries
Ingest
result sets
SIP
orders
Archival Storage
AIP
AIP
DIP
Administration
MANAGEMENT
OAIS Functional Entities (Figure 4-1)
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The OAIS model (4)

• Information model
• Information Object (basic concept)
• Data Object (bit-stream)
• Representation Information (permits the full
  interpretation of Data Object into meaningful
  information)
• Information Object Classes
• Content Information
• Preservation Description Information (PDI)
• Packaging Information
• Descriptive Information

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The OAIS model (5)

• Information model (continued)
• Information package
• Container that encapsulates Content Information
  and PDI
• Packages for submission (SIP), archival storage
  (AIP) and dissemination (DIP)
• AIP ... a concise way of referring to a set of
  information that has, in principle, all of the
  qualities needed for permanent, or indefinite,
  Long Term Preservation of a designated
  Information Object

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The OAIS model (6)

• 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
• A set of Information Objects
• Based on categories discussed in CPA/RLG report
  Preserving Digital Information (1996)

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The OAIS model (7)
Preservation Description Information
Preservation Description Information
Reference Information
Provenance Information
Context Information
Fixity Information
PDI Preservation Description Information (Figure
4-16)
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Cedars metadata (1)

• Metadata for digital preservation the Cedars
  project outline specification
• Cedars project team and UKOLN
• Published, March 2000
• Broadly based on general framework of OAIS
  information model
• An outline specification
• Overview ...

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Cedars metadata (2)

• Preservation Description Information
• Reference Information
• Resource Description
• e.g., Title, Creator, ...
• Existing metadata
• Context Information
• Related Information Objects

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Cedars metadata (3)

• Provenance Information
• History of Origin
• Reason for creation, custody history, original
  technical environments, etc.
• Management History
• Ingest, actions, etc.
• Rights Management
• Publisher details, permitted actions, etc.
• Fixity Information
• Authentication indicator

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Cedars metadata (3)

• Content Information
• Representation Information
• Structure Information (transforming Data Object
  into structured set of components)
• Underlying Abstract Form description
• Transformer Objects
• Render/Analyse/Convert Objects
• Semantic Information (mechanisms that allow the
  specific Data Object to be rendered)
• Render/Analyse Objects
• Data Object (preserved byte-stream)

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Related work (1)

• National Library of Australia
• PANDORA project (1996- )
• Preservation metadata for digital collections
  (October 1999)
• NEDLIB project
• OAIS-based core metadata schema (2000)
• OCLC and RLG
• Preservation Metadata Working Group (2000- )
• White paper (2001) recommendations

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Related work (2)

• Digitisation initiatives
• NISO Technical Metadata for Digital Still Images
  (draft, 2001)
• Metadata Encoding Transmission Standard (METS)
• Recordkeeping metadata initiatives
• Australian Recordkeeping Metadata Schema (RKMS)
• Archiving Metadata Forum

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Acknowledgements

• UKOLN is funded by Resource the Council for
  Museums, Archives and Libraries, the Joint
  Information Systems Committee (JISC) of the UK
  higher and further education funding councils, as
  well as by project funding from the JISC and the
  European Union. UKOLN also receives support from
  the University of Bath, where it is based.

http//www.ukoln.ac.uk/