State of Play presentation at the LOD2 Plenary Vienna 2012: WP6 - Interfaces, Integration & LOD2 Stack by Bert van Nuffelen of TenForce.

1. Creating Knowledge out of Interlinked Data
WP6 – Interfaces,
Integration & LOD2 Stack
Plenary Meeting Vienna 21-23 march 2012 Bert Van Nuffelen (Tenforce)
Collaborative Project 2010-2014
in Information and Communication Technologies
Project No. 257943
Start Date 01/09/2010
http://lod2.eu
EU-FP7 LOD2 WP10 – 22.-23.9.2011. 02.09.2010 . Page 1 http://lod2.eu

2. Creating Knowledge out of Interlinked Data
Linked Data Publishing
Inter-linking/
Fusing
Manual Classifi-
revision/ cation/
authoring Enrichment
Storage/ Quality
Querying Analysis
Evolution /
Extraction
Repair
Search/
Browsing/
Exploration
EU-FP7 LOD2 WP6 – 21.-23.3.2012. Page 2 http://lod2.eu

3. Creating Knowledge out of Interlinked Data
Linked Data Publishing Pre LOD2
SILK
Inter-linking/
Fusing
OntoWiki
Manual Classifi-
revision/ cation/ DLlearner
authoring Enrichment
Storage/ Quality
Querying Analysis
Virtuoso
Evolution /
Extraction
Repair
D2R Search/
Browsing/
Exploration
sindice
EU-FP7 LOD2 WP6 – 21.-23.3.2012. Page 3 http://lod2.eu

4. Creating Knowledge out of Interlinked Data
Linked Data Publishing after LOD2
Inter-linking/
Fusing
Manual SILK Classifi-
revision/ cation/
authoring Enrichment
OntoWiki
Storage/ Quality
Querying Virtuoso Analysis
DLlearner
D2R
Evolution /
Extraction sindice Repair
Search/
Browsing/
Exploration
EU-FP7 LOD2 WP6 – 21.-23.3.2012. Page 4 http://lod2.eu

5. Creating Knowledge out of Interlinked Data
Integration Objectives
1. Improve the overall software support for Linked Data publication.
2. Support deployment Linked Data components
3. Improve information sharing between Linked Data components so that publishing
Linked Data is eased.
4. Improve access to the content: the online Linked Open Data.
EU-FP7 LOD2 WP6 – 21.-23.3.2012. Page 5 http://lod2.eu

6. Creating Knowledge out of Interlinked Data
WP6 Achieving Integration Objectives
WP1 WP6 WP6 WP6
(sep ‘10-’11) (sep ‘11 – ‘12) (sep ‘12-’13) (sep ‘13-’14)
LOD2 stack LOD2 stack LOD2 stack
1 2 Final
released released released
• WP6 consists of 4 tasks
T6.1: Integration of User Interfaces
T6.2: Integration of LOD2 stack API Components
T6.3: Testing, Documentation & Tutorials
T6.4: Development of application scenarios and testing the LOD2 stack
configurator
EU-FP7 LOD2 WP6 – 21.-23.3.2012. Page 6 http://lod2.eu

7. Creating Knowledge out of Interlinked Data
Some year 1 review comments
• Page 2: Something that requires particular attention during the second year is how the different
technologies developed in the project complement one another to address the current limitations of
the LOD web.
• Page 3: How do the developments in Virtuoso, taking place in this project, address these problems?
And how will those developments allow SILK or SIG.MA, for instance,to work better?
• The SOA and the requirements analysis do not cover some issues related to querying multiple
datasets in combination. An example for such question could be: Do people want to be able to do
queries like the following one:
SELECT ?band ?location WHERE {
?band music-ont:similar_to dbpedia:Dire_Straits;
dbp-ont:hometown ?location .
?location geo-ont:parentFeature dbpedia:Germany. }
If it was possible to define and evaluate such queries efficiently, can one expect LOD data to be used
more widely? Note that such query requires owl:sameAs semantics to be applied to aggregate
data from MusicBrainz, DBPedia and Geonames and the transitivity of location nesting relation of
Geonames to be enforced.
EU-FP7 LOD2 WP6 – 21.-23.3.2012. Page 7 http://lod2.eu

8. Creating Knowledge out of Interlinked Data
WP6: past 6M – Core work
Maintenance of the LOD2 stack
• Improving existing tools
• Adding new tools
• Infrastructure management (repository, online demo, ...)
• Improving lod2 demonstrator
Dissimination of the LOD2 stack
• LOD2 stack Webinars
• Wiki.lod2.eu: documentation wiki
• Stack.lod2.eu / lod2.eu website
• Integrating new LOD2 partners
• Legal aspects => IPR document
Testing activities
• Automatic test (test.stack.lod2.eu)
• Application scenarios study
• Overview of testing activities for each components
• Overview of hardware requirements
EU-FP7 LOD2 WP6 – 21.-23.3.2012. Page 8 http://lod2.eu

9. Creating Knowledge out of Interlinked Data
WP6: Past 6M: Integration work
Shared user interfaces
• Shared graph management
• Shared prefix management
• Shared vocabulary management
• Goal: create webapi’s that support these functionalities & have them used by some tools
Shared Authentication
• WebID has been chosen as authentication mechanism for the LOD2 stack
• Goal: a single sign on mechanism for all Tomcat based components
Shared Provenance
• First meetings just past
• Goal: a vision document to be elaborated Y3
EU-FP7 LOD2 WP6 – 21.-23.3.2012. Page 9 http://lod2.eu

10. Creating Knowledge out of Interlinked Data
WP6: an intermediate milestone achieved
Intermediate release 1.1 of the LOD2 stack: 12 march 2012
• New tools:
• Limes & colanut
• Valiant
• Semantic Spatial browser
• Upgraded tools (w.r.t. sept. 2011)
• Virtuoso
• Ontowiki
• Silk
• Documentation & IPR document
EU-FP7 LOD2 WP6 – 21.-23.3.2012. Page 10 http://lod2.eu

11. Creating Knowledge out of Interlinked Data
WP6: Core: next 6M
Maintenance of the LOD2 stack
• Standarize on Ubuntu 12.04 LTS for the next 2,5 years
• Smooth release management => ensuring that all is right => Quality enhancement
• Many new tools are get available
• Smooth searching and publishing in CKAN repositories
Dissimination of the LOD2 stack
• Webinars continue
Testing activities
• Multi stage repository
• test server activation
• First evaluation w.r.t. Application scenarios
EU-FP7 LOD2 WP6 – 21.-23.3.2012. Page 11 http://lod2.eu

12. Creating Knowledge out of Interlinked Data
WP6 breakout discussion topics
Year 2 finalisation
• Planning alignment
• Deliverable documents description
Integration (Do we work towards answering the right questions?)
• When does a component is a true member of the LOD2 stack?
• Demonstrator vs Configurator
• Intercomponent feedback loops
• Shared user interface experience
• Authentication & provenance (only feedback probably)
Application scenarios & evaluating the LOD2 stack
Collaboration with other EU projects: e.g. LarkC
EU-FP7 LOD2 WP6 – 21.-23.3.2012. Page 12 http://lod2.eu

13. Creating Knowledge out of Interlinked Data
Layered Architecture View
EU-FP7 LOD2 WP6 – 21.-23.3.2012. Page 13 http://lod2.eu

14. Creating Knowledge out of Interlinked Data
Functional View Of Abstract application
EU-FP7 LOD2 WP6 – 21.-23.3.2012. Page 14 http://lod2.eu

15. Creating Knowledge out of Interlinked Data
Bert Van Nuffelen
Web: http://www.tenforce.com
Mail: bert.van.nuffelen@tenforce.com
Phone:+32 479 06 24 26
LOD2 Project: http://lod2.eu
LOD2 OGD StakeholderSurvey: http://survey.lod2.eu
LOD2 Stack: http://stack.lod2.eu
EU-FP7 LOD2 WP10 – 22.-23.9.2011. 02.09.2010 . Page 15 http://lod2.eu