1. Application of the Linked Data
Visualization Model on Real World
Data from the Czech LOD Cloud
Jakub Klímek
Jiří Helmich
Martin Nečaský
http://xrg.cz | contact@xrg.cz
XML and Web Engineering Research Group
Faculty of Mathematics and Physics
Charles University, Prague
Czech Republic
klimek@fit.cvut.cz
Faculty of Information Technology
Czech Technical University in Prague
2. CzLOD cloud
OpenData.cz since 2012
100M triples
RUIAN 600M triples
Virtuoso 7 instance
http://linked.opendata.cz/sparql
Application of LDVM on Real World Data from the CzLOD Cloud 2
3. CzLOD cloud
Business entities
ARES – Business registry
COI.CZ – Czech Trade Inspection Agency
Research projects
Geographical data
RUIAN – territorial identification
linked to LAU & NUTS
Geocoding results
Application of LDVM on Real World Data from the CzLOD Cloud 3
4. CzLOD cloud
Governmental datasets
OVM – ministries, cities, notaries, ...
• Agendas (opening hours)
Laws - decisions of the Czech Supreme court
Statistical datasets
Demography
Budgets
Exchange rates – European Central Bank
Application of LDVM on Real World Data from the CzLOD Cloud 4
5. LDVM
Abstract process
4 stages
3 transformation types
3 operator types
Adapted for RDF
Input transformed to RDF
Internally works with RDF
Existing visualizers
accept proprietary
formats
Application of LDVM on Real World Data from the CzLOD Cloud 5
6. LDVM stages
Source RDF
and non-RDF data
Data transformation
Application of LDVM on Real World Data from the CzLOD Cloud 6
7. LDVM stages
Analytical abstraction
Relevant data extraction
using SPARQL operators
Analyzers
Reusability
Application of LDVM on Real World Data from the CzLOD Cloud 7
8. LDVM stages
Visualization abstraction
Transformers
Reusing concepts
e.g. skos:broader
Application of LDVM on Real World Data from the CzLOD Cloud 8
9. LDVM stages
View
Visualizers
• User configuration
(rotate, scale, zoom, etc.)
End-users
Application of LDVM on Real World Data from the CzLOD Cloud 9
10. LDVM components compatibility
Components compatibility
Input signature
• SPARQL ASK
Output data sample
Application of LDVM on Real World Data from the CzLOD Cloud 10
11. LDVM Demonstration
Case: Inspections of COI.CZ
Input signature of an analyzer:
Application of LDVM on Real World Data from the CzLOD Cloud 11
15. Compatibility demonstration
Application of LDVM on Real World Data from the CzLOD Cloud 15
CzLOD – COI.CZ
Check actions
analyzer
Hierarchy
transformer
GEO
transformer
CzLOD – CAFIA
16. Implementation: Payola
Analyzer editor with analytical plugins
Collaborative features
Inner analyzers
Custom plugins
One-click solution for non-expert users
Caching analyzer results
Application of LDVM on Real World Data from the CzLOD Cloud 16
18. Thank you for your attention
Jakub Klímek
Jiří Helmich
Martin Nečaský
http://xrg.cz | contact@xrg.cz
XML and Web Engineering Research Group
Faculty of Mathematics and Physics
Charles University, Prague
Czech Republic
klimek@fit.cvut.cz
Faculty of Information Technology
Czech Technical University in Prague
Notes de l'éditeur
To show owners of the data, what benefits can be gained from proper publication
OVM = institutions of public power
Mezi stages tečoupouze RDF data
DvazpůsobypoužitíSe zachovánímsémantikyBezzachovánísémantky pro účelyvizualizace
Signature je komplikovana, ale checkAction je je zeschama.org, location taky a do tohoformatuplanujemeprevestdalsi data, jeste z kontroljidla => reusable+ Q2, kteraoverujehierarchii