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