British Library Linked Open Data Presentation for ALA June 2014
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Transcript of British Library Linked Open Data Presentation for ALA June 2014
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Linked Open Library DataThe British Library Experience
Neil WilsonHead, Collection Metadata
The British Library
ALA Las VegasJune 28 2014 © The British
Library Board 2014
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www.bl.uk 2
Objectives
To describe:
•Why we offer linked data
•What we offer
•What we learned
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The British Library
• Receives a copy of every publication available in UK
• Collection includes over 150 million items:
• 14 million books
• 920,000 journal & newspaper titles
• 3 million sound recordings & much more…
• Operates the world's largest document delivery service
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Metadata Provision
The BL Act records our role as “national centre for… bibliographical & other information services”
BL Metadata Services:
• Originally offered priced services
• Evolved through many technologies
• Began to offer open data in 2010
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New Landscape – New Expectations
• The Web fuelled expectation information should be open
• Government requirement for open public data has grown
• The Open Data agenda now covers:
• Transparency• Economic growth• Research
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BL Open Metadata Strategy
We offer metadata to promote:
• Innovation – by removing unnecessary barriers
• Migration from local formats - to cross domain standards
• Collaboration - with new user communities
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BL Open Metadata Strategy
Includes offerings for:
• Libraries - MARC21 & Z39.50
• Researchers - RDF/XML & .CSV
• Linked Data Users - RDF & SPARQL
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Results
• 1090 user organisations in 105 countries
• Collaborations with Microsoft, UK Government & developers on technical, standards & licensing challenges
• Linked Open BNB• Cabinet Office exemplar & selected for
UK National Information Infrastructure• 2 million transactions monthly
• 95% Satisfaction Rating
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Why Work on Linked Open Library Data?
• Concept of open & connected information - fits well with libraries
• Participation in the new landscape – improves access to knowledge & culture
• The promise of a reusable global data pool – should enable libraries to add unique value
Dickens, Charles
Resource ID
Great Expectations
Resource ID
Sketches
Boz
Has Title
Has Author Has Author
Has Title
Resource ID
Sunday Under Three Heads
Sparks, Timothy
Has Author
Has Title
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Why Choose the BNB for LOD?
Reusable publications dataset - not unique catalogue
Permissive License – CC0
Includes: People, Places, Dates, Subjects
Consistent over 60 years
Underlined our commitment
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Linking
To give data broader context we linked to:
• General resources:• GeoNames
• Lexvo
• RDF Book Mashup
• Library resources:• LCSH
• VIAF
• Dewey.info
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How?MARC21 to RDF Conversion Workflow
Full BNB MARC21
File
Transform to RDF/XML using
XSLT
Load to Linked Data Platform
Generate RDF Triple Dump
BNB RDF/XML file
Select records
Convert to pre-composed UTF-8
Normalise for improved
matching & transforms
Create BL URIs and add external
URIs by matching
MARCPre-Processing
Load to BL Downloads page
Process• Selection• Character set conversion• Pre-processing• URI generation• Data transformation• Create & load triples• Produce VoiD descriptions
Tools• Catalogue Bridge Utilities • MARC Global/MARC Report http://www.marcofquality.com/• Jena Eyeball http://jena.sourceforge.net/Eyeball/
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Access Options
.
BNB 1950-2012 3.5 Million Records
98 Million Unique Triples
• bnb.data.bl.uk/sparql
• thedatahub.org/dataset/bluk-bnb-basic
• www.bl.uk/bibliographic/download.html
• bnb.data.bl.uk
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Lessons Learned - Linked Data
• Use the opportunity to review & remodel your data
• Plan for service support & identifier persistence
• Try to move beyond data dumps & silo sites
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Lessons Learned – Communication
• Expertise & abilities vary - new user groups require new communication methods
• Clearly explain data & its uses – via examples
• Document your data – e.g. identify entities (places, people, dates etc.)
• Partner with researchers & developers – learn together & build communities of interest
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Lessons Learned - Data
• You understand your data – but need to show its relevance to others
• Offer samples for comment –identify user needs & continually improve
• Conversions highlight old issues - & often create new ones
• Actively license derived data - to support linked open services
015964007
Great Expectations
011931834
Sketches
Has Title
Has Author ID
Has Author ID
Has Title
011931862
Sunday Under Three Heads
Has Author ID
Has Title
http://viaf.org/viaf/
88666393
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Lessons Learned – Expectations
• One size doesn’t fit all – different users = different needs
• How to capture usage, value & attribution – to maintain funding
• Need to ensure evolving expectations are met – Community, libraries, Government etc.
Ownership/Licensing
agreements
Legislation (e.g. Data
Protection Act)
Organisational Restrictions
Technical issues (e.g. non-standard
formats)
Policy on sharing with for profit
organisations etc
Organisational Restrictions
Ownership/Licensing
agreements
Legislation (e.g. Data Protection
Act)
Organisational Restrictions
Technical issues (e.g.
non-standard formats)
Policy on sharing with
for profit organisations
etc
Scope
Format?
Coverage?
Delivery options? (e.g. Web, FTP etc)
Level of user support?
Rights
To use for any purpose forever?
To adapt & improve?
To redistribute?
To release to the community?
FreeFreeOfferingOffering
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Lessons Learned - Efficiencies
• Flexibility of linked data store
• Improved visibility of unique material
• New perspectives on your data – e.g. Controlled fields
• Better return on investment - via increased utility & flexibility
“Linking Open Data cloud diagram, by Richard Cyganiak and Anja Jentzsch. http://lod-cloud.net/”
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Final Thoughts
Linked Library Data:
• Can reach a wider audience - offering greater value
• Isn’t a ‘magic bullet’ – but can be a valuable tool
• May not be ultimate solution – but libraries can learn much & contribute valuable experience
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Final Thoughts
• Better web integration of our resources increases visibility to new groups - Wider utility = wider relevance
• Linked Data offers libraries new opportunities - authority, persistence & stability being key to the emerging infrastructure
See: http://vimeo.com/36752317
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For More Information Visit…
http://www.bl.uk/bibliographic/datafree.html
http://bnb.data.bl.uk/faqs
http://bnb.data.bl.uk/getting-started
http://bnb.data.bl.uk/docs
http://twitter.com/#!/BLMetadata
http://www.bl.uk/bibliographic/datafree.html
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