Post on 09-May-2015
description
Towards the Linked Data Web
Sören Auer
Creating Knowledge out of Interlinked Data
Sören Auer – The emerging Web of Linked Data 26.1.2011 Page 2 http://lod2.eu
Web server
Web server
Problem: Try to search for these things on the current Web:
Apartments near German-Russian bilingual childcare in Leipzig.
ERP service providers with offices in Vienna and London.
Researchers working on multimedia topics in Eastern Europe.
Information is available on the Web, but opaque to current Web search.
Why Linked Open Data?
berlin.deHas everything about childcare in Berlin.
Immobilienscout.deKnows all about real estate offers in GermanyDB
Web server
DB
Web server
Search engineHTML HTML
RDF RDF
Solution: complement text on Web pages with structured linked open data & intelligently combine/integrate such structured information from different sources:
Creating Knowledge out of Interlinked Data
Sören Auer – The emerging Web of Linked Data 26.1.2011 Page 3 http://lod2.eu
The emerging Web of Data
Creating Knowledge out of Interlinked Data
Sören Auer – The emerging Web of Linked Data 26.1.2011 Page 4 http://lod2.eu
The emerging Web of Data
Creating Knowledge out of Interlinked Data
Sören Auer – The emerging Web of Linked Data 26.1.2011 Page 5 http://lod2.eu
Achievements1. Extension of the Web with
a data commons (25B facts
2. vibrant, global RTD community
3. Industrial uptake begins (e.g. BBC, Thomson Reuters, Eli Lilly)
4. Emerging governmental adoption in sight
5. Establishing Linked Data as a deployment path for the Semantic Web.
LOD achievements and challenges
Challenges1. Coherence: Relatively few,
expensively maintained links2. Quality: partly low quality data
and inconsistencies3. Performance: Still substantial
penalties compared to relational 4. Data consumption: large-scale
processing, schema mapping and data fusion still in its infancy
5. Usability: Missing direct end-user tools and network effect
These issues are closely related and should ultimately lead to an ecosystem of interlinked knowledge!
• Web - a global, distributed platform for data, information and knowledge integration• exposing, sharing, and connecting pieces of data, information, and knowledge on the Semantic Web
using URIs and RDF (W3C Standards)
July 2007 April 2008 September 2008
July 2009
Creating Knowledge out of Interlinked Data
Sören Auer - The emerging Web of Linked Data 26.1.2011 Page 6 http://lod2.eu
Inter-linking/ Fusing
Classifi-cation/ Enrichment
Quality Analysis
Evolution / Repair
Search/ Browsing/ Exploration
Extraction
Storage/ Querying
Manual revision/ authoring
Linked DataLifecycle
Challenges
Creating Knowledge out of Interlinked Data
Sören Auer – The emerging Web of Linked Data 26.1.2011 Page 7 http://lod2.eu
UK School Map App
© Slide adapted from “Application and Benefits for End Users” by Andreas Harth
http://schoolmap.org.uk/
Creating Knowledge out of Interlinked Data
Sören Auer - The emerging Web of Linked Data 26.1.2011 Page 8 http://lod2.eu
http://schoolmap.org.uk/
Wrapper
App
UK School Map .
© Slide adapted from “Application and Benefits for End Users” by Andreas Harth
Creating Knowledge out of Interlinked Data
Sören Auer - The emerging Web of Linked Data 26.1.2011 Page 9 http://lod2.eu
German Federal Budget App
11.04.2023
http://bund.offenerhaushalt.de/
Creating Knowledge out of Interlinked Data
Sören Auer - The emerging Web of Linked Data 26.1.2011 Page 10 http://lod2.eu
http://bund.offenerhaushalt.de/
German Federal Budget
Wrapper
App
© Slide adapted from “Application and Benefits for End Users” by Andreas Harth
Creating Knowledge out of Interlinked Data
Sören Auer - The emerging Web of Linked Data 26.1.2011 Page 11 http://lod2.eu
Use case: Stuttgart 21
Controversial infrastructure project in southern GermanyAim: convert terminus into a through station located undergroundBudget estimates: 4,5 1 – 7 2 – 10 2 Milliards Euro
1 http://www.stuttgarter-zeitung.de/stz/page/2287550_0_4248_-drexler-nennt-termin-februar-2010-baubeginn-fuer-stuttgart-21.html2 http://www.spiegel.de/spiegel/0,1518,718813-2,00.html
© Slide adapted from “Application and Benefits for End Users” by Andreas Harth
Creating Knowledge out of Interlinked Data
Sören Auer - The emerging Web of Linked Data 26.1.2011 Page 12 http://lod2.eu
My Dream
11.04.2023
Services
Integration
Data
Wrappers
Apps
Budget S21(official)
Budget K21(competing) Route
Protectedsites
Attitudesurvey
Passenger numbers
Economicstats
© Slide adapted from “Application and Benefits for End Users” by Andreas Harth
Creating Knowledge out of Interlinked Data
Sören Auer - The emerging Web of Linked Data 26.1.2011 Page 13 http://lod2.eu
Some Benefits of Linked Open Gov’t Data
Enables applications that allow for– getting a 360 ° view on an issue– rapid fact-checking– cross-referencing and checking of statistical claims (“how to lie with statistics”)– increased transparency in public debate– release of the creative potential of “the crowd”
Help citizens in their daily life– to understand their governments better– find good places to live (little pollution, good schools, close to protected
natural sites…)– locate public services (administrative offices, public toilets…)
Brings citizens and government closer together
Thanks for your attention!
Sören Auerhttp://www.informatik.uni-leipzig.de/~auer/ | http://aksw.org |
http://lod2.orgauer@uni-leipzig.de
Creating Knowledge out of Interlinked Data
Sören Auer – The emerging Web of Linked Data 26.1.2011 Page 15 http://lod2.eu
LOD2 in a Nutshell
15
Research focus• Very large RDF data
management• Enrichment &
Interlinking• Fusion & Information
Quality• Adaptive UI interfaces
Use Cases• Media & Publishing• Enterprise Data Webs• Open Gov Data
PartnersUni Leipzig, DERI Galway,
FU Berlin, Semantic Web Company, OpenLink, Tenforce, Exalead, Wolters Kluwer, OKFN