adrian stevenson (ukoln) – linked open copac archives hub (locah) project – use of timemap for...
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www.bath.ac.uk
LOCAH Project• Linked Open Copac and Archives Hub• Funded by #JiscEXPO 2/10 ‘Expose’ call
– 1 year project. Started August 2010
• Partners & Consultants:– UKOLN – Adrian Stevenson, Julian Cheal– Mimas – Jane Stevenson, Bethan Ruddock, Yogesh
Patel– Eduserv – Pete Johnston– Talis – Leigh Dodds, Tim Hodson– OCLC - Ralph LeVan, Thom Hickey– Ed Summers
• http://blogs.ukoln.ac.uk/locah/
www.bath.ac.uk
Archives Hub and Copac• UK National Data Services based at Mimas• Archives Hub is an aggregation of archival
descriptions from archive repositories across the UK– http://archiveshub.ac.uk
• Copac provides access to the merged library catalogues of libraries throughout the UK, including all national libraries– http://copac.ac.uk
www.bath.ac.uk
What is LOCAH Doing?
• Part 1: Exposing Archives Hub & Copac data as Linked Data
• Part 2: Creating a prototype visualisation
• Part 3: Reporting on opportunities and barriers
Linked Data Design Issues
• URIs
• LD Design Issues
• Triples
http://www.w3.org/DesignIssues/LinkedData.html
Triples• Triples statements
– ‘Things’ have ‘properties’ with ‘values’– Subject – Predicate - Object
• Triples are the basis of RDF
ArchivalResource
Repository Provides Access To
The Rolling Stones
Keith Richards Is Member Of
www.bath.ac.uk
We’re Linking Data!
• If something is identified, it can be linked to• We take items from one dataset and link
them to items from other datasets
BBCBBCVIAFVIAF
DBPediaDBPediaArchives
HubArchives
Hub
CopacCopac
GeoNamesGeoNames
www.bath.ac.uk
Enhancing our data• Already have some links:
– Time - reference.data.gov.uk URIs– Location - UK Postcodes URIs and Ordnance
Survey URIs – Names - Virtual International Authority File
• Matches and links widely-used authority files - http://viaf.org/
– Names - DBPedia
• Also looking at:– Subjects - Library Congress Subject Headings and
DBPedia
http://data.archiveshub.ac.uk/
http://data.archiveshub.ac.uk/id/person/nra/webbmarthabeatrice1858-1943socialreformer
www.bath.ac.uk
How are we creating the Visualisation Prototype?
• Based on researcher use cases
• Data queried from Sparql endpoint
• Use tools such as Simile, Many Eyes, Google Charts
Visualisation Prototype• Using Timemap –
– Googlemaps and Simile
– http://code.google.com/p/timemap/
• Early stages with this• Will give location and
‘extent’ of archive.• Will link through to
Archives Hub
Linking Lives Project
• Starts September 2011• Builds on Locah work
www.bath.ac.uk
The Key Benefit of Linked Data (?)
• Mashups work against a fixed set of data sources
• Hand crafted by humans
• Don’t integrate well
• Linked Data promises an unbound global data space
• Easy dataset integration
• Generic ‘mesh-up’ tools
Matching Subjects
Matching Places
www.bath.ac.uk
Sustainability
• Can you rely on data sources long-term?
• Ed Summers at the Library of Congress createdhttp://lcsh.info
• Linked Data interface for LOC subject headings
• People started using it
Scalability / Provenance
Example by Bradley Allen, Elsevier at LOD LAM Summit, SF, USA
• Same issue with attribution• Solutions: Named graphs? Quads? • Best Practice
www.bath.ac.uk
Data Modelling• Complexity
– Archival description is hierarchical and multi-level
• Dirty Data
Licensing• ‘Ownership’ of data• Hard to track attribution• CC0 for Archives Hub and Copac data
www.bath.ac.uk
Linked Data for Repositories?• Repository data can ‘work harder’
• New channels into your data
• New connections with other data sources
• Researchers are more likely to discover sources
• ‘Hidden' collections of repositories become of the Web
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