Forging Links & Breaking Shackles The Linked Open Data BNB Brenda Young Metadata Systems Manager.
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Transcript of Forging Links & Breaking Shackles The Linked Open Data BNB Brenda Young Metadata Systems Manager.
Forging Links & Breaking Shackles
The Linked Open Data BNB
Brenda YoungMetadata Systems Manager
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Linked Data & Ex Libris
2011 IGeLU conference at University of Haifa included a linked data session (See: http://igelu.org/conferences/haifa-2011/archive-of-presentations )
The Linked Open Data SIWG was
created after the event “…to achieve essential linked open data features in all Ex Libris products where appropriate, both from the data publishing, the data consuming and the data integration perspective”
Contact Lukas Koster, University of Amsterdam Library for more information
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British Library Metadata ServicesBackground
Has its roots in The British National Bibliography Ltd prior to the BL’s foundation
The BL supplies metadata to:
Increase visibility of holdings & connect users to BL content, e.g. via OCLC, COPAC etc
Participate in collaborative national & international cataloguing initiatives, e.g. ISDS, SUNCAT
Support free and priced bibliographic services
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A Changing Bibliographic Environment… Library Sector Relevance
Declining?
“I did my PhD with only 12 visits to a library. That was 5 years ago;
things have improved since then, now you don’t need to use a library
at all!”
Increasing?
“The release of library data offers the opportunity for it to be used in ways
un-thought of by the library & information community…”
New External Drivers Putting Public Sector Data To Work
The web accelerated development of a collaboration culture & fostered expectation that information should be freely available
2009 saw an increasing Government commitment to the principle of opening up public data for wider reuse
Public data will be released under open licences which enable free reuse, including commercial reuse
New External Drivers Linked Open Data
Government proposes a 5 star rating for open public data:
Available on the web (any format), with an open licence
As 1 star + available as machine-readable structured data (e.g. Excel)
As 2 star + but non-proprietary format
All the above + open standards from the World Wide Web Consortium
All the above + link your data to other people’s data to provide context
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So What Are We Doing?
Rising expectations & technical developments make it essential the BL responds
We are meeting the challenge of the new environment by:
Developing an open metadata strategy
Freely offering foundational metadata
Collaborating with the community on innovative new services (e.g. linked data) to advance understanding
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Open Metadata StrategyObjectives
Adopt a multi-threaded approach addressing the needs of:
Traditional libraries Researchers using new
metadata processing techniques
Linked data developers
Remove barriers & enable innovation without unnecessary restrictions
Migrate from library to cross-domain standards, developing solutions with users
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What Have We Achieved?
Signed over 600 organisations in 80 countries to z39.50 service
Supplied catalogue metadata in new formats under CC0 licenses e.g. the Open Library, BBC & Wikimedia Commons
Worked with Government, W3C & developers on technical, standards & licensing issues
Created a linked data version of the British National Bibliography
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Why Should We Be Interested In Linked Data?
See: http://vimeo.com/36752317
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Our Linked Data JourneyWhat to Offer?
We wanted to:
Advance debate from theory to practice via release of a ‘critical mass’ of data
Show commitment by using a large, core dataset: niche examples are not as compelling
Why BNB? A reusable dataset of published
output: not a unique institutional catalogue
Uniform format over 60 years & 3 million records in many languages
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The BNB & Linked Data Selecting Sites For Linking
To put BNB data in a wider context
We blended general linked resources:
GeoNames Lexvo RDF Book Mashup
With key linked library resources:
LCSH VIAF Dewey.info
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Collaboration
BL Metadata Services
BNB Data Catalogue Bridge
• Utilities and tools for manipulating MARC21 data
TMQ MARC Global Tools Analysts
• Bibliographic Data Analysis• MARC to RDF mapping• XSLT Conversion scripts
Production team• Match & merge• Bulk processing
Talis
Training• RDF• SPARQL
Technical Infrastructure Data Modelling
Assistance
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The BNB & Linked Data Remodelling
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MARC21 to RDF 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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The BNB & Linked Data Vocabularies used
Bibliographic Ontology Bio: a Vocabulary for Biographical Information British Library Terms Dublin Core Event Ontology FOAF: Friend of a Friend ISBD Org: an Organisation Ontology OWL SKOS RDF Schema WGS84 Geo Positioning
Sample data can be downloaded from: http://www.bl.uk/bibliographic/datasamples.html
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The BNB & Linked Data Format Conversion - MARC
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The BNB & Linked Data Format Conversion – RDF/XML
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The BNB & Linked Data Format Conversion – Triples
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Where Did We Get To?Multiple Access Routes
.
BNB Books 1950-2012 3 Million Records
90 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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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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Lessons Learned Its a New Way of Thinking…
Give thought to data modelling & sustainability: Data wasn’t originally designed for this
Everyone is learning: you may be the best judge
There may be tools or expertise out there: don’t reinvent the wheel
Conversion inevitably identifies hidden data issues: & creates new ones!
Offer sample data for feedback: & continually improve…
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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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Next Steps?
Linked Open BNB See:http://www.bl.uk/bibliographic/datafree.html
Next steps:
Complete staged release
Offer monthly updates once complete
Documentation & further refinement of data model
Identify what could be offered or linked to next?
Questions?Images from