cyganiak_richard_state-of-play_lod
DESCRIPTION
Presentation held at the event "Open Government in Practice" hosted by ]init[ Digital Communication, Brussels, 12 April 2011TRANSCRIPT
Copyright 2011 Digital Enterprise Research Institute. All rights reserved.
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Enabling Networked Knowledge
State of Playin Linked Open Data
Richard Cyganiak12 April 2011 - Open Government in Practice
Digital Enterprise Research Institute www.deri.ie
Enabling Networked Knowledge
Linked Open Data cloud
http://lod-cloud.net/
Media
Government
Geo
Publications
User-generated
Life sciencesCross-domain
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Enabling Networked Knowledge
Linked Data Principles
1. Use URIs to identify the “things” in your data
2. Use http:// URIs so people (and machines) can look them up on the web
3. When a URI is looked up, return a description of the thing (in RDF format)
4. Include links to related things
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Enabling Networked Knowledge
Linked Data example
4
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Enabling Networked Knowledge
The Growth by Domain 2009-2010
Domain Triples (June 2009) Triples (Nov 2010) Growth
Geographic 3.097.000.000 5.904.980.833 91%
Libraries 212.000.000 2.237.435.732 955%
Media 698.000.000 2.453.898.811 252%
Life sciences 2.429.000.000 2.664.119.184 10%
Cross-domain 214.000.000 1.999.085.950 834%
User-generated 76.000.000 57.463.756 -24%
Government 0 11.613.525.437 -
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Enabling Networked Knowledge
Doubles every 10 months
01-2003 01-2004 12-2004 12-2005 12-200610
100
1000
Number of datasets in the LOD Cloud (logarithmic)
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Enabling Networked Knowledge
TimBL’s 5-star plan for open data
★ Make your data available on the Web under an open license
★★ Make it available as structured data(e.g., an Excel sheet instead of image scan of a table)
★★★ Use a non-proprietary format(e.g., a CSV file instead of an Excel sheet)
★★★★ Use linked data format(i.e., URIs to identify things, and RDF to represent data)
★★★★★ Link your data to other people’s data to provide context
Source: http://inkdroid.org/journal/2010/06/04/the-5-stars-of-open-linked-data/
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Enabling Networked Knowledge
Government data catalogs
http://datos.fundacionctic.org/sandbox/catalog/map
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Enabling Networked Knowledge
The fourth star
★★★★ Use linked data format(i.e., URIs to identify things, and RDF to represent data)
From “document/report” thinking to web thinking What are the “things” your organization manages? Assign identifiers (http:// URIs) Make “things” web-addressable
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Enabling Networked Knowledge
The fifth star
Standardization/alignment/harmonization between data produced by different organizations Connect to standard identifiers Use standard schemas to describe things (e.g., a person) Linking and mapping can happen up-front or after the
fact Basics can be widely standardized and combined with
specific local schemas and IDs
★★★★★ Link your data to other people’s data to provide context
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Enabling Networked Knowledge
Effort distribution
Fix Overall Data Integration
Effort
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Enabling Networked Knowledge
Projects / Activities 2011
Digital Enterprise Research Institute www.deri.ie
Enabling Networked Knowledge
W3C
SPARQL 1.1 RDFa 1.1 RDF Core refresh W3C Government Linked Data Working Group
http://www.w3.org/2011/gld/charter.html Community Directory Best Practices for Publishing Linked Data Standard Vocabularies: Data catalogs; statistical data
cubes; organizational structure
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Enabling Networked Knowledge
FP7 EC Support ActionLOD Around-The-Clock (LATC)
co-ordinated by DERI (Michael Hausenblas)
http://latc-project.eu/
14
Linked EC projects
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Enabling Networked Knowledge
EU data cloud
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Enabling Networked Knowledge
FP7 EC Integrated ProjectCreating Knowledge out of
Interlinked Data (LOD2)http://lod2.eu/
16
Linked EC projects
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Enabling Networked Knowledge
Competitions
Open Data Challengehttp://opendatachallenge.org/
Triplification Challengehttp://i-semantics.tugraz.at/triplification-challenge
Linked Data-a-thonhttp://iswc2011.semanticweb.org/calls/linked-data-a-thon/
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Enabling Networked Knowledge
Thank You!