oclc linked data roundtable event ifla 2012
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Making The Connection
Linked Open Data at the British Library
Neil WilsonHead, Metadata Servicesneil.wilson@bl.uk
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British Library Metadata Services
The BL has a long history of supplying metadata to:
Increase visibility of BL holdings & connect users to content
Contribute to collaborative cataloguing initiatives
Support free and priced bibliographic services
Changing Environment
The Web - fostered expectation information should be open to all
Data has new value - from open technologies enabling rapid connection & reuse
‘Open + Data’ drives strategies for :
Transparency Economic growth
Research & discovery
Changing Environment Public Sector Open Data Rating
★ Available on Web + open licence
★★ + machine-readable
★★★ + non-proprietary format
★★★★ + W3C open standards
★★★★★ + link to others data
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Linked DataPotential Benefits for Libraries
Improved web
integration of resources - increasing visibility & reaching new users
A global pool of reusable data - for libraries to add unique value
New library leadership opportunities - due to persistence, stability & authority
Changing EnvironmentLibrary Data
Users were once lone scholars but now include:
Collaborative Learners
Data miners
Machines
Libraries must respond to:
Stimulate innovation
Enable knowledge creation
Increase relevance & utility
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British Library Open Metadata Strategy Aims
Migrate - from library formats to cross domain
standards
Collaborate - with community on new services advancing debate from theory to practice
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British Library Open Metadata Strategy Aims
Remove barriers - enabling innovation without unnecessary restrictions
Achieve recognition - while using licensing appropriate
for widest re-use
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Open Service Objectives
Target services for:
Traditional libraries (MARC21/Z39.50)
Researchers - using new metadata processing techniques (RDF/XML)
Linked data developers (RDF Triples/SPARQL)
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Linked Open Data
Preliminaries
To concentrate effort on our data we identified:
The best licensing option for our objectives (CC0)
A proven hosting platform
External sources of expert comment
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Linked Open Data Objectives
A staff & organisational development opportunity using:
In-house staff
Existing tools & technologies
Library MARC21 data
Established linked data resources
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Linked Open Data Why BNB?
General bibliography - not a unique institutional catalogue
Consistent format - over 60 years
Size & range of content - 3 million records on all subjects in many languages
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Linked Open Data Why BNB?
Underlined commitment by offering:
Large, popular dataset - not niche sample
Reusable metadata - not unique resource
Foundational service & model - for others to build on
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Linked Open Data MARC Migration
Started simply - improving with developing staff expertise
Used expert training in:
Linked data concepts
RDF modelling
Presentation options
Used the opportunity to re-evaluate & innovate - blending the best of old & new
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Linked Open Data Creating Links
Techniques:
Automatic generation from
record data
Auto text match with linked data dumps
Crosswalk matching for coded data
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Linked Open Data Linked Site Selection
To embed data in a wider context we linked:
General resources: GeoNames Lexvo RDF Book
Mashup
Plus library resources: LCSH VIAF Dewey.info
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MARC21 to RDF XML Conversion Workflow
MARC to RDF conversion Consists of multiple automated steps
• Selection• Pre-processing• Character set conversion• URI generation
Data transformation
• Selection• Pre-processing• Character set conversion• URI generation
• Selection• Pre-processing• Character set conversion• URI generation
• Data transformation
• Create & load triples
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Access Options
.
BNB Books 1950-2012 2.8 Million Records
85 Million Unique Triples
• bnb.data.bl.uk/sparql
• thedatahub.org/dataset/bluk-bnb-basic
• thedatahub.org/dataset/bluk-bnb
• bnb.data.bl.uk/describe
• bnb.data.bl.uk/search
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Linked Open Data A Change in Perspective
From self contained records for resources
To linking triple statements about resources
With ‘records’ assembled from statements
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Linked Open Data
Achievements
Presence & visibility
New library data model - being utilised by wider groups
New opportunities for collaboration - with public & private sector organisations
Confirmation that valuable data will be used – e.g. up to 8 million monthly transactions
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Linked Open Data Challenges
How to:
Capture service value & gain attribution for effort
Ensure expectations are met - both Government & wider community
License derived 3rd party data - to support open re-supply
Ensure effective service maintenance - & persistence
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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Library Linked Data Wish List? We Need More…
Tools to link library data to other resources
LMS integration of linked data options
Navigation & visualisation applications
Feedback on usage
Collaboration on shared approaches
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Linked Open BNB http://www.bl.uk/bibliographic/datafree.html
Next Steps:
Regular updates
More documentation & refinement of model
Extend to cover further material & linked resources
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