WESO MeTTeG 2011

696 views

Published on

Published in: Technology
0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total views
696
On SlideShare
0
From Embeds
0
Number of Embeds
100
Actions
Shares
0
Downloads
6
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide

WESO MeTTeG 2011

  1. 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 JuneCode: TSI-020100-2010-919
  2. 2. ObjectiveCreation of a pan-european e-procurement platform
  3. 3. E-procurement Long Tail TED BOE (official bulletin of the Spanish Governement) BOPA (official bulletin of the Asturian Governement)
  4. 4. Taking into account the multicultural and multilingual issues
  5. 5. To Be Able to answer to… Which public procurement notices arerelevant 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. 6. But clients do not know how to find suitable notices…Company Business Clients User
  7. 7. “Semantic” support to the business user +Company Clients
  8. 8. Structuring public procurement notices d Providing new semantic- based services yD Z ^ ^ ^ D DK WKW LOD enrichmentK W ^ Ws Z Easing the access to the published data using theEhd^ LOD approach Transforming government classifications
  9. 9. Structuring the public procurement notices and government classifications• CPV codes• NUTS codes• Total amount• Duration• Type of enterprise• Others..
  10. 10. Preliminary Results/ d d Ws ZKEhd^W
  11. 11. Semantic-based Services Problem of«Query Expansion»depending on the kind of information variable
  12. 12. ^ Z
  13. 13. Methods of«Query Expansion» / d Z E ^ ^ h , ^ Z
  14. 14. Remembering… Which public procurement notices arerelevant 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)?
  15. 15. cpv:45221111-3 NL Query… Ehd^ Z t KEE ppn:nutsCode ppn:hasDuration cpv:CodeIn2008 ppn:hasAmount org:classification ^D
  16. 16. cpv:45221111-3 NL Applying Query Expansion… Ehd^ Ehd^ E Ehd^ Ehd^ ppn:nutsCode ppn:hasDuration cpv:CodeIn2008 ppn:hasAmount org:classification ^D
  17. 17. Example of SPARQL querySELECT 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)) ). …}
  18. 18. Resultshttp://purl.org/weso/moldeas/
  19. 19. Jquery+Exhibit!
  20. 20. Publishing linked data with WESO DESH Pubby
  21. 21. Graph explorationthrough SNORQL
  22. 22. 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
  23. 23. 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 JuneCode: TSI-020100-2010-919

×