Dr. Sören Auer (OKFN Advisor Board, LOD2 EU project Coordinator) Linked Data Challenges LOD2 Project Results (15 minutes

1. Linked Data Challenges & LOD2
Sören Auer
Universität Leipzig & OKFN Germany

2. The best way to get value from data is to give it away
in standardized formats.

3. Linked Data example
Sören Auer The Semantic Data Web 3
23.8.2011 Page 3 http://lod2.eu

4. The emerging Web of Data
achievements and challenges
• 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
Achievements Challenges
1. Coherence: Relatively few,
1. Extension of the Web with
expensively maintained links
a data commons (currently
2. Quality: partly low quality data
amounting 35 Billion facts)
July 2007 April 2008 September 2008 and inconsistencies
2. vibrant, global RTD 3. Performance: Still substantial
community penalties compared to relational
3. Industrial uptake begins 4. Data consumption: large-scale
(e.g. BBC, Thomson processing, schema mapping
Reuters, Eli Lilly) and data fusion still in its infancy
4. Emerging governmental 5. Usability: Missing direct end-
adoption in sight user tools and network effect
5. Establishing Linked Data as
a deployment path for the These issues are closely related
Semantic Web. and should ultimately lead to an
ecosystem of interlinked
July 2009 knowledge!

5. The Linked Data Lifecycle Inter-
linking/
Fusing
Manual Classifi-
revision/ cation/
authoring Enrichment
Storage/
Linked Data Quality
Querying
Lifecycle Analysis
Challenges
Evolution /
Extraction Repair
Search/
Browsing/
Exploration

6. LOD2 in a Nutshell
Creating Know le dge
out of Interlinked Data
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
Partners
Uni Leipzig, DERI Galway,
FU Berlin, Semantic
Web Company,
OpenLink, Tenforce,
Exalead, Wolters
Kluwer, OKFN, IMP,
Zemanta, I2G, UEP
Sören Auer – The Semantic Data Web 14.7.2011 Page 6 http://lod2.eu

7. Creating Knowledge out of Interlinked Data
LOD2 Stack
Inter-linking/
Fusing
Manual
revision/ SILK Classifi-cation/
Enrichment
authoring
OntoWiki
Storage/ Quality
Querying Virtuoso Analysis
DLlearne
D2R r
Evolution /
Extraction sindice Repair
Search/
Browsing/
Exploration
Das Web der Daten für Unternehmen . 07.04.2011 . Page 7 http://lod2.eu

8. Creating Knowledge out of Interlinked Data
LOD2 stack repository: http://stack.lod2.eu
• The LOD2 stack repository
• HOWTO start
• HOWTO contribute
• From scratch (most system knowledge required)
• From downloadable Virtual machines
• Online: http://demo.lod2.eu/lod2demo
Das Web der Daten für Unternehmen . 07.04.2011 . Page 8 http://lod2.eu

9. Creating Knowledge out of Interlinked Data
WP1: Task 1.1 Common requirements analysis and specification
Task 1.3 Early Stack Prototype (M6 12)
http://demo.lod2.eu/lod2demo
Das Web der Daten für Unternehmen . 07.04.2011 . Page 9 http://lod2.eu

10. OKFN.de
• OffeneDaten.de
• München Open
Government Day
• Offener Haushalt
• Frankfurt gestalten
• Frag den Staat
• Apps für Deutschland
• Berlin Open Data Day
• Open Aid Data
• Open Data Hackdays

11. Thanks!
• Sören Auer
• Research Group AKSW/Uni Leipzig,
http://aksw.org
• auer@uni-leipzig.de
• Open Knowledge Foundation Deutschland,
http://okfn.de