LOD2: State of Play WP5 - Linked Data Visualization, Browsing and Authoring

Creating Knowledge out of Interlinked Data

WP5 - Linked Data Visualization, Browsing
and Authoring
Renaud Delbru,
National University of Ireland, Galway

Paris, 23 March 2011

http://lod2.eu
LOD2 Title . 23.03.2010 . Page 1 http://lod2.eu


WP 5: Linked Data Visualization, Browsing and Authoring

Goal

WP5 aims to build on and go beyond existing approaches for realizing
adaptive Web user interfaces.

Partners

ULEI - UNIVERSITAET LEIPZIG
CWI - STICHTING CENTRUM VOOR WISKUNDE EN INFORMATICA
NUIG - NATIONAL UNIVERSITY OF IRELAND, GALWAY
FUB - FREIE UNIVERSITAET BERLIN
SWC - SEMANTIC WEB COMPANY GMBH




Tasks

Task 5.1 – Faceted Spatial-Semantic Browsing
NUIG, ULEI, FUB, CWI, SWC
Task 5.2 – Adaptive Semantic Authoring
ULEI
Task 5.3 – Social Semantic Networking
SWC
Task 5.4 – Mobile Semantic Interfaces
NUIG




The promise of the LOD data integration is fulfilled when data
integration is dynamic
 visualization is needed to support this

For this to happen we envision different visualization tools:
1. Tools to search, browse and inspect datasets
2. LOD powered widgets
• To enhance web sites
• To support vertical search interfaces
3. Sig.ma Enterprise Edition (Sig.ma EE)
4. Faceted Spatial Browsing
5. Semantic Authoring
6. PoolParty UI – Alternative Wiki UIs



WP 5: Tools to search and browse datasets

• Finding datasets which are interesting for several aspects:
• powering a LOD application
• enhancing an existing dataset
• validating an existing dataset

• The tools will support

• hundreds of thousands of datasets

• text search and faceted browsing (content, tags and metadata)

• social features (dataset annotation, promotion, etc.)

• recommendations based on the user context e.g. an existing
dataset or a manually listed set of entities


WP 5: Tools to search and browse datasets



WP 5: Tools to inspect LOD datasets

• Explore the structure and overall composition of a dataset

• Interactive visualization tools
• Advanced triple visualization
• Zoom-able graph representation
• Entity-centric representation
• Others, possibly triggered by the data itself

• Statistics about data
• Statistics about datasets (e.g., triple counts, classes, ontologies)
• Statistics about links (e.g., histograms, inter-links)
• Statistics regarding entity disambiguation (e.g., sameAs, IFP)

• These tools address both the Entity, Document and Dataset level



WP 5: LOD powered widgets

• A platform to create flexible interactive widgets that can be easily
embedded and integrated in any web based application

• A workflow will guide the domain expert through
1. selection of the datasets
2. creation of the query and
3. customization of its layout (quality default layouts will be
provided)



WP 5: LOD powered enhancement widgets



WP 5: LOD powered vertical search widgets

Mockup



WP 5: LOD powered widget composer
Mockup



WP 5: Sig.Ma Enterprise Edition

• Sig.Ma Enterprise Edition (Sig.Ma EE) is an evolution of Sig.Ma
which is targeted at LOD and Enterprise LOD clouds

• Sig.Ma EE:
• Can be deployed in house (as a servlet!) not dependent on
Sindice
• Is able to restrict which LOD datasets one can use
• Is able to query and integrate specific and heterogeneous data
sources thanks to a flexible adapters and plugins model
• can be customized (uncertainty thresholds for fuzzy
consolidation)



WP 5: What The DoW Says on CWI

• M18 - D5.1.2
• “Initial geo-benchmark definition: Based on the capabilities and
envisioned features of the spatial-semantic browsing
component, CWI will select a data set (e.g. OpenStreetMap)
and formulate a representative set of queries that could be
generated by the spatial-semantic browsing component. “

• M36 - D5.1.4
• “CWI and Openlink will measure/ demonstrate the effectiveness
of the MonetDB and Virtuoso RDF data management solutions
for large-scale spatial-semantic query answering, as generated
by the spatial-semantic browsing component.”

• CWI has 6 out of 75 man-months in WP5 (8%)



WP 5: Geo Benchmarking

• Database benchmarking is a core task in the scalable data
management work-package (WP2) that CWI leads

• Goals of Benchmarking:
• stimulate technical progress in the field
• involve outside third parties (e.g. engine vendors)
• binding factor among LOD2 participants:
• FUB – BSBM
• ULEI - DBpedia benchmark
• CWI & OGL – RDF-H Social Intelligence Benchmark (SIB)

• LOD2 initiative: benchmark auditing service
• LOD2 academic partner audits benchmark runs
• allow vendors to submit properly tuned benchmark results
• stringent check for fairness, providing credibility


WP 5: Geo Benchmarking

• Steps D5.1.2:
• looking at past (non-LOD) geographical benchmarks
• spatial-only or spatio-temporal ?
• learn about the use cases for spatial LOD
• identifying representative datasets
• identifying representative query workloads
• identifying stakeholders in spatial LOD
• choosing/formulating a benchmark

• Steps D5.1.4:
• identifying engines that can run it, motivating to submit
• evaluating the benchmark on Virtuoso and MonetDB
• perform optimizations
• extend the LOD benchmark auditing service to spatial RDF



WP 5: Task 5.1 – Faceted Spatial-Semantic Browsing (ULEI)

• Map display enriched with
faceted browsing interface

• Result view w/ RDFa
templates

• 2 implementations:
• Linked Geodata
Extension
• OntoWiki Extension



WP 5: Task 5.2 – Semantic authoring widgets (ULEI)

• RDFa + SPARQL/Update
based authoring widgets

• Spatial authoring widgets
(lon/lat selection,
automatic geocoding)

• Widget choreography
• Meta widgets
containing defined
sets of sub-widgets
for certain KB schema
types
• Overridable system
decisions


WP 5: PoolParty Thesaurus Management GUI (SWC)
Search with auto-complete

Toolbar

Hierarchy tree
Concept SKOS details view

Link concepts via drag and drop
or auto-complete

© Semantic Web Company – http://www.semantic-web.at/


Color coded RDF Classes Different views on concepts via tabs



WP 5: Linked Data Consumption, Usage and Publishing Cycle



WP 5: Linking and pulling in data from LOD sources



WP 5: Alternative Wiki and Linked Data UIs



WP 5: Conclusions

WP 5 has just started and:
• Ambitious goals (e.g., to serve the whole LOD community
via general tools)

• Has already many ongoing subprojects
• But also on demand development

• Is here to listen to your needs so speak up! 



WP 9: Irish Government Data (DERI Contribution)

• Set up http://ie.ckan.net/
with OKF support

• Together with Central
Statistics Office and
Department of
Education

• Showcase/applications


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