OCLCs Digital Archive Disseminating with METS

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OCLCs Digital Archive Disseminating with METS

• Jay Goodkin
• Software Engineer
• Digital Collection and Preservation Services

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Todays Presentation

• OCLC Digital Archive Overview
• Dissemination Workflow
• OCLCs METS Implementation for Dissemination

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OCLC Digital Archive - Overview

• Functions include
• Harvest
• Ingest
• Content Group Management
• Rights Group Management
• Viewing
• Dissemination
• Reports
• Periodic Audits of Objects in the Archive
• Frequent Backups and Disaster Prevention
• Dissemination Information Packages based on METS
  schema

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Digital Archive Services
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Discovery Services
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Digital Archive Record

• Contains the Metadata for each Digital Object in
  the Archive
• Extension of Dublin Core
• Entered and Maintained using OCLCs Connexion
  Service
• Starting Point for Most Functions in the Archive
• Please see http//www.oclc.org/support/documentati
  on/digitalarchive/da_metadata_elements/ for a
  detailed description of our metadata elements

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DA Record in Connexion
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Disseminating an Object
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Dissemination Options

• Original Links Disseminate Original HTML Pages
  as Captured from the Web
• Relative Links Disseminate a Locally Viewable
  Object

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Dissemination Confirmation
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Reports

• Each Object has a List of Associated Reports
• Harvest, Ingest and Disseminate Reports shown

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Dissemination Report
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Dissemination Manager
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Inside OCLCs DIP

• Supports Multiple Objects
• Contains all Content Files for each Object
• Contains one METS Manifest
• Contains all Object-Level METS Documents

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WinZIP View of the DIP
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METS Manifest

• Uses mptr to point to all Object-Level METS
  Documents included in the DIP

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OCLCs METS Profile

• Header - No extension
• Descriptive Metadata Section - OCLC descriptive
  schema http//digitalarchive.oclc.org/schemas/oclc
  _dm.xsd
• File Section - No extension
• Structural Map Section - No extension
• Behavior Section - No extension

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METS Profile Continued

• Administrative Metadata Section
• MIX schema http//www.loc.gov/standards/mix/mix.x
  sd
• textMD schema http//dlib.nyu.edu/METS/textmd.xsd
  
• OCLC provenance schema http//digitalarchive.oclc
  .org/schemas/oclc_prov.xsd

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METS Header

• References OCLC Extensions
• References Industry Standard Extensions e.g. Mix

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METS File Group

• Lists all Content Files for a given Object
• Points to Technical/Provenance Metadata for each
  File

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TechMD Mix Example
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ProvMD Mix Example
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StructMap Example
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StructMap Web Documents

• Fitting Web Documents into div Structure
• Issues with representing Links and Offsets
• structLink shows which Pages link together but
  not where the Links occur
• Considered using the ltpargtltareagt structure

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Multi-Object DIP
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Multi-Object Manifest
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Issues with Dissemination

• Interoperability of OCLCs DIP
• Issues with encoding large Digital Objects into a
  METS package
• Standardization of Extension Schemas Web
  Documents

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Future Plans

• Use METS to Integrate with other Digital
  Repositories
• CONTENTdm
• Olive
• DSpace
• Etc.
• Redesign Digital Archive Storage Layer based on
  METS

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Contacts at OCLC

• Please visit our Web site at
• http//www.oclc.org/digitalarchive/
• Contacts
• Pam Kircher Product Manager
• kircherp_at_oclc.org
• Shweta Rani Software Developer
• ranis_at_oclc.org
• Jay Goodkin Software Developer
• goodkinj_at_oclc.org

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Questions

• Please see our Tutorial at
• http//www.oclc.org/support/training/digitalarchi
  ve/
• Questions?