1. Innovative services to ease the access
to the public procurement notices using
linking open data and advanced
methods based on semantics
José María Álvarez Rodríguez
WESO-Universidad de Oviedo
http://purl.org/weso/moldeas/
5th International Conference on Methodologies, Technologies and Tools enabling
e-Government
Camerino (Italy)
30th of June
Code: TSI-020100-2010-919

2. Objective
Creation of a pan-european
e-procurement platform

3. E-procurement
Long Tail
TED
BOE
(official bulletin
of the Spanish
Governement) BOPA
(official bulletin
of the Asturian
Governement)

4. Taking into account
the multicultural
and multilingual
issues

5. To Be Able to answer to…
Which public procurement notices are
relevant to Dutch companies (only SMEs) that
want to tender for contracts announced by
local authorities with a total value lower than
170K € to procure “Road bridge construction
work” and a two year duration in the Dutch-
speaking region of Flanders (Belgium)?

6. But clients do not know
how to find suitable
notices…
Company Business Clients
User

7. “Semantic” support to the
business user
+
Company Clients

8. Structuring public procurement notices
d
Providing new semantic-
based services
yD Z ^
^
^
D D
K W
KW LOD
enrichment
K
W ^
Ws Z
Easing the access to the
published data using the
Ehd^ LOD approach
Transforming government classifications

9. Structuring the public
procurement notices and
government classifications
• CPV codes
• NUTS codes
• Total amount
• Duration
• Type of enterprise
• Others..

11. Preliminary Results
/ d d
W
s Z
K
Ehd^
W

12. Semantic-based
Services
Problem of
«Query Expansion»
depending on the kind of
information variable

13. ^ Z

14. Methods of«Query
Expansion»
/ '
d Z
E
'
^ ^ h ,
^
Z

15. Remembering…
Which public procurement notices are
relevant to Dutch companies (only SMEs) that
want to tender for contracts announced by
local authorities with a total value lower than
170K € to procure “Road bridge construction
work” and a two year duration in the Dutch-
speaking region of Flanders (Belgium)?

16. cpv:45221111-3
NL
Query…
Ehd^ Z'
t KEE
ppn:nutsCode
ppn:hasDuration
cpv:CodeIn2008
ppn:hasAmount org:classification
^D

17. cpv:45221111-3
NL
Applying Query Expansion…
Ehd^
Ehd^ E
Ehd^
Ehd^
ppn:nutsCode
ppn:hasDuration
cpv:CodeIn2008
ppn:hasAmount org:classification
^D

18. Example of SPARQL
query
SELECT DISTINCT * WHERE {
?ppn rdf:type http://purl.org/weso/ppn/def#ppn.
?ppn org:classification http://purl.org/organizations#SME
?ppn ppn:nutsCode ?nutsCode.
FILTER(?nutsCode = nuts:B3 ... ) .
?ppn cpv:codeIn2008 ?cpvCode.
FILTER(? cpvCode = cpv:45221111-3 ... ) .
?ppn dc:identifier ?id.
?ppn dc:date ?date .
? ppn ppn:hasAmount ?amount.
FILTER (
(xsd:double(?amount) = xsd:long(170,000))
(xsd:double(?amount) = xsd:long(200,000)) ).
?ppn ppn:hasDuration ?duration.
FILTER (
(xsd:long(?duration) = xsd:long(2))
(xsd:long(?duration) = xsd:long(3)) ).
…
}

19. Results
http://purl.org/weso/moldeas/

20. Jquery+Exhibit!

21. Publishing linked data with
WESO DESH Pubby

22. Graph exploration
through SNORQL

23. Evaluation and Further
Steps
• Test ranking functions to sort out
results
• Validation (“pedantic”) of the
published data
• Tracking organizations activity
• Evaluation of the improvement with
regards to the legacy system

24. Innovative services to ease the access
to the public procurement notices using
linking open data and advanced
methods based on semantics
José María Álvarez Rodríguez
WESO-Universidad de Oviedo
http://purl.org/weso/moldeas/
5th International Conference on Methodologies, Technologies and Tools enabling
e-Government
Camerino (Italy)
30th of June
Code: TSI-020100-2010-919