This document summarizes a presentation on semantic technologies and linked data. It discusses several European Union projects utilizing semantic technologies, including linking open government data. It also evaluates different public sector datasets in Spain for their compliance with linked data principles and best practices. Visualizations are provided showing the growth of links between terminology datasets over time as well as the increased efficiency of semantic querying compared to traditional methods.

1. Dr. Jose María Alvarez Rodríguez
SEERC, Thessaloniki
18-02-2013

6. (official bulletin of the
Asturian Governement)

7.  Problem statement
 Justification
 Main Objective
 Specific Objectives
 …

9.  17% of GDP  TED
 Action Plan 2004 and  RAMON
2020  Projects
 E-Certis
 Legal framework
 Fiscalis 2013
 16K notices/day  E-Prior
 Boost SMEs  PEPPOL
participation  STORK
…  …

10. Source: European Union

12. 






13.  Common & shared data model  Different Domains
 RDF  Geography
 Logic formalism  E-Commerce
 Reasoning  Medicine
 Knowledge-management  Bibliography
 Expert systems  E-Government
 Standards  …
 Query languages  Next …Web 3.0?
 Vocabularies
 Datasets
 …

14. 1. Use URIs to name things
2. When someone looks up a URI,
provide useful information,
using the standards (RDF*,
PARQL).
3. Include links to other URIs.
4. Use HTTP URIs.

15. 1. Data Must Be Complete.
2. . . . Primary.
3. . . . Timely.
4. . . . Accessible.
5. . . . Machine processable.
6. Access Must Be Non-Discriminatory.
7. Data Formats Must Be Non-Proprietary.
8. Data Must Be License-free.

16. Linked Open Data
 203 datasets ( 25 Billions of rdf triples) and
 395 millions of links (Sept. 2010).
 Domains: Media, Geographic, Government (42,09 %),
 Publications, Cross-domain, Life sciences, etc.
(Ago. 2011).
 393 datasets (Jun. 2012).
http://richard.cyganiak.de/2007/10/lod/

17. Jose Labra Chris Bizer
Anja Jentzsch
Michael Hausenblas
Richard Cyganiak Sören Auer Jenni Tennison
Christophe Gueret
Óscar Corcho
Frank van Harmelen Wikier
Axel
Polleres
Aidan Hogan
Juan Miguel Peter Mika
https://ec.europa.eu/digital-agenda/ Gomez
G. Tummarello Irene Celino
http://ec.europa.eu/research/horizon2020/index_en.cfm

20. TED 1 Produce
3 Consume
…
XML RDFizing Semantic
Services
(e.g. Searching,
Methods Matchmaking &
BOE Prediction)
BOPA
Organizations
Linked Data
2 Api
Pubby+Snorql
CPV RDFizing Publish
NUTS
Eurovoc
4 Validate

33. http://purl.org/weso/moldeas/ (it is now being updated)

36. vs

38. Criteria (Level of compliance) in PPNs
Yes No N/A
23
70 65
152 152 154 10
157
34
173
121
9 92
12 12 14
32 35 30 25
Reference TED CODICE BOE External LOTED MOLDEAS
Services

39. Criteria (Level of compliance) in PSCs
Yes No N/A
23 33
10
159 152
173
153
12 21
25 21
Reference CSV/Excel External Services MOLDEAS

40. Criteria (Level of compliance) in Organizations
Yes No N/A
23
78 65
151 10
167 156
172 175 33
173
121
10 85
9 20 1 9
35 23
20 20 12

43. 15000
14000
13000
12000
11000
10000
9000
8000
7000
6000
5000
4000
3000
2000
1000
0
CPV 2003 CN 2012 CPC 2008 CPA 2008 ISIC V4 NAICS NAICS SITC V4
2007 2012
#Terms #Links to CPV 2008 #Links through PO
150
140
130
120
110
100
90
80
70
60
50
40
30
20
10
0
CPV 2003 CN 2012 CPC 2008 CPA 2008 ISIC V4 NAICS 2007 NAICS 2012 SITC V4
Real gain Real gain through PO Max gain

44. Evolution of #Links and elements
40357
35357
30357
25357
20357
15357
10357
CPV CPV CPC CPA NAICS NAICS
CN 2012 ISIC V4 SITC V4
2008 2003 2008 2008 2007 2012
#Links to CPV 2008 10357 10819 13209 17611 23010 23775 26075 28261 32072
#Links through PO 10357 18669 21059 25462 30872 31637 33937 36123 39943

54. 70,00
60,00
50,00
Time (sec.)
40,00 3,00
30,00
Time (sec.)
2,00
20,00
1,00
10,00
0,00 0,00
T3 T4 T5 T6-1 T6-2 T7-1 T7-2 T8-1 T8-2 T9-1 T9-2 T10-1 T10-2 T1 T2
Test Test
100
90
80
70
% Gain wrt T3
60
50
40
30
20
10
0
-10
-20
-30
-40
-50
-60
-70
-80
T4 T5 T6-1 T6-2 T7-1 T7-2 T8-1 T8-2 T9-1 T9-2 T10-1 T10-2
Test

55. * Conclusions in depth are available in the full presentation.

58. Questions
Thank you for
your attention!

59. Credits
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