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How we implemented Linked Data in a small project at the Victorian Parliamentary Library.
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Department of Parliamentary ServicesParliamentary Library and Information Service
Linked Data:thinking big, starting small
VALA 6 February 2014
Peter Neish@peterneish
Department of Parliamentary ServicesParliamentary Library and Information Service
What will be covered
• Background
– What is Linked Data?
– Linked Data in Libraries and Government
• What we did
– Linked Data Workflow
• What did we get out of it?
Department of Parliamentary ServicesParliamentary Library and Information Service
What is Linked Data?
SubjectDenis Napthine
Predicateparty
ObjectLiberal Party
the triple statementslightly simplified example
http://www.w3.org/ns/org#memberOf
http://parliament.vic.gov.au/members/id/135 http://dbpedia.org/resource/Liberal_Party_of_Australia
1 October 1988
premier
United Australia
Party
Ted Baillieu
elected
hasRole
successorOf party
31 August 1945
formationDate
successorOf
Department of Parliamentary ServicesParliamentary Library and Information Service
Department of Parliamentary ServicesParliamentary Library and Information Service
Department of Parliamentary ServicesParliamentary Library and Information Service
Department of Parliamentary ServicesParliamentary Library and Information Service
Linked Data in Libraries
• OCLC – 1.2 million resources – 80 million triples
• LOC – Subject headings, authority files
• British Library – 2.8 million records, 93 billion triples
• BIBFRAME
• Schema Bib Extend Community Group
• LODLAM
Department of Parliamentary ServicesParliamentary Library and Information Service
Linked Data in Parliament and Government
– 6.4 billion triples of open government data
Department of Parliamentary ServicesParliamentary Library and Information Service
Open Government
Department of Parliamentary ServicesParliamentary Library and Information Service
Project aims• Is Linked Data useful in a
local context
• Explore the process of using Linked Data – where do you start?
• Being able to interrogate our data in new ways
• Use visualisation to gain new insights into data
Department of Parliamentary ServicesParliamentary Library and Information Service
Databases at Parliament
People and Organisations
Members of Parliament
government agencies
Media
media releases
newspaper clippings
video and audio clips
Documents
parliamentary debates (Hansard)
parliamentary papers
party policies
Department of Parliamentary ServicesParliamentary Library and Information Service
Linked Data Workflow
• choose ontology• investigate similar projectsPreparation
• clean data (cluster, facet)• named entity extraction• reconcile with other data
Clean and reconcile data
• output RDF• store data (files, triple store etc)Publish
Department of Parliamentary ServicesParliamentary Library and Information Service
• Investigate similar projects
– Don’t reinvent the wheel
– Collaborate
• Choose an ontology (or build your own)
– Linked Data Open Vocabularies (lov.okfn.org)
Preparation
Department of Parliamentary ServicesParliamentary Library and Information Service
• developing open government specifications relating to the legislature
• prioritizes reuse over novelty
• attempts to make it easy to represent real-world data
• consensus model – open to contributions (W3C community group, github)
Popolo Ontologypopoloproject.com
Department of Parliamentary ServicesParliamentary Library and Information Service
Clean and reconcile data
Department of Parliamentary ServicesParliamentary Library and Information Service
Clean and reconcile data
Department of Parliamentary ServicesParliamentary Library and Information Service
• create RDF (Open Refine can do this too)
• store data
– separate files
– embedded in html
– Database mapping using D2RQ
– triple store
Publish
Department of Parliamentary ServicesParliamentary Library and Information Service
• Combined approach
– embedded data in catalogue
– Fuseki Triple Store
• Complex queries using SPARQL:
– what have previous speakers being saying about the current issues in parliament?
– find all articles about transport that mention members of the Road Safety Committee
What do we get out of it?
Department of Parliamentary ServicesParliamentary Library and Information Service
Department of Parliamentary ServicesParliamentary Library and Information Service
Links to related articles
Department of Parliamentary ServicesParliamentary Library and Information Service
Federal Preferences 2013 Election
Department of Parliamentary ServicesParliamentary Library and Information Service
Conclusion
• The process itself is valuable
• Aligning data with standards (Popolo Ontology)
• Cleaning and reconciling adds value to data
• Databases linked internally
• Can now provide Linked Data externally
Department of Parliamentary ServicesParliamentary Library and Information Service
Further Information
Linked Data best practise and recipes
• freeyourmetadata.org
• linkeddatabook.com
• euclid-project.eu
@peterneish
github.com/peterneish
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