Adventures in Digital Asset Management: Fedora at the National Library of Wales Glen Robson National...
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Adventures in Digital Asset Management: Fedora at the National Library of Wales Glen Robson National Library of Wales [email protected]
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Transcript of Adventures in Digital Asset Management: Fedora at the National Library of Wales Glen Robson National...
Adventures in Digital Asset Management: Fedora at the National Library of Wales
Glen Robson
National Library of Wales
Contents
The National Library of Wales Why the NLW choose Fedora The pilot Theoretical look into preservation Data Models
The National Library of Wales
Nature of NLW Collecting
– Variety of data types and formats
Preserving– Obsolescence– Lack of context information– Persistent identifiers– Integration
Access– Open collections
Why we choose Fedora
Comparison with D-Space Fundamental issues
– Suitability for wide range of data types– Suitability for distribution of data types– Support for collection structures– Scalability– `Future-proof’ architecture
The Pilot
Understand the Fedora System Experiment with different data types Allow access to Digital Assets Investigate workflows for moving digital
material into the repository
Examples
Ingested Digitised Images E-Thesis Ingested web pages Born Digital Object Basic authentication and rights
management
E-Thesis
Abstract Word Document Thesis
– Original, PDF, Text, HTML and Tiff page images
Video Composition– Original, DivX and Web Viewer
Web Pages
Complex Digital Objects– Arrive in a Compressed File
Dissemination 1 Uncompress tar and serve– Simple– Difficult to migrate formats
Dissemination 2 Extracted and ingested into Fedora– More complicated– Can do format migration without breaking links– HTML converted to XHTML– Meta data can be assigned to each page, image or movie.
Digitised Images
Problems:– Obsolete Formats– Loss of context information– Persistent identifiers and URLs– Integration – Access
Digital Images – Obsolete Formats
What if we move from jpeg to jpeg2000– Website would have to be updated– All links would break:
• http://cairsweb.llgc.org.uk/images/mst/mst00001.jpg– Special Viewer?
Fedora’s Solution– Find all images– Add a disseminator to convert jpg files to jpeg2000– Links not file specific:
• http://teilo:9080/llgc/getImage/getMedium?PID=llgctest1:189
– Record conversion in meta data– History automatically saved
Digital Images – Context information
Fedora’s Solution– Mets Document in object as Data Stream– Version history so changes saved– Can store any type of Meta data:
• Mets Rights• PREMIS Preservation Meta data
– Could even store the intro page located on the Digital Mirror
Digital Images – Persistent Identifiers
Fedora’s Solution– Data Type independent URLs
• http://teilo:9080/llgc/getImage/getMedium?PID=llgctest1:189
– Fedora PID constant even through upgrades– Can add any Identifiers using Fedora relationships – URLs link to Servlets for redirection
GetMedium Servlet1 Find pid llgctest1:189 Get Mid sized image Data Stream Convert to JPEG2000 Return Image
GetMedium Servlet2 Find pid llgctest1:189 Resize large image Data
Stream Convert to JPEG2000 Return Image
Digital Images - Integration
Existing Digital Content from the Digital Mirrorhttp://teilo:8080/cocoon/METS/MST00001/frames?
div=1&subdiv=0&locale=en&mode=thumbnail
– Ingest existing Mets documents into Fedora• No change to existing workflow
– Ingest images into Fedora• Better preservation
– Allow original look and feel to website• One line change to configuration file
– Enhanced Version (PDF of Book)
Digital Images - Access
3 Types– Through Catalogue
• Difficult with Geac• New System OAI Harvesting?
– By Browsing• Current Digital Mirror • Relationships
– View all digitised collection:http://teilo:8080/cocoon/ViewCollection/llgctest1:DigitisedCollection
– By searching repository• Ambfish• Indexes Mets Documents
Data Models
Object: Fish BookPID: llgctest1:108
DS1.0 Page 1 LargeDS2.0 Page 1 MidDS3.0 Page 2 LargeDS4.0 Page 2 MidDS5.0 Page 2 LargeDS6.0 Page 2 MidDS7.0 MIX Meta for Page 1DS8.0 MIX Meta for Page 2DS9.0 MIX Meta for Page 3DS10.0 METS Document
New Model
Object: Page1 Fish BookPID: llgctest1:109
DS1.0 Image LargeDS2.0 Image MidDS3.0 MIX Meta about DS1.0
Object: Page2 Fish BookPID: llgctest1:110
DS1.0 Image LargeDS2.0 Image MidDS3.0 MIX Meta about DS1.0
Object: Fish BookPID: llgctest1:108
DS1.0 Mets Doc
Is Part Of Is Part Of
Summary
Fedora as DAMs Fedora Community Moving towards OAIS and Trusted
Digital Repository status
![Our Venues [1] - State Library of New South Wales](https://static.fdocuments.in/doc/165x107/6270e35e6cfa651a733288e2/our-venues-1-state-library-of-new-south-wales.jpg)
