Innovative services to ease the access to the public procurement notices using

linking open data and advanced methods based on semantics

Code: TSI-020100-2010-919

José María Álvarez RodríguezWESO-Universidad de Oviedohttp://purl.org/weso/moldeas/

5th International Conference on Methodologies, Technologies and Tools enabling e-Government

Camerino (Italy)30th of June

Objective

Creation of a pan -european e-procurement platform

Covering almost every publicprocurement notices of the

European regions

E-procurement Long Tail

TEDBOE

(official bulletin of the Spanish Governement) BOPA

(official bulletin of the Asturian Governement)

Taking into accountthe multicultural and multilingual

issues

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)?

But clients do not knowhow to find suitable

notices …

ClientsBusiness User

Company

“Semantic ” support to thebusiness user

ClientsCompany

+

XML

TEDTED

RDFizing

CPVCPV

Services

(e.g. Searching,

Matchmaking &

Prediction)BOEBOE

……

NUTSNUTS

Organizations

BOPABOPA

RDFizing

EurovocEurovoc

Linked Data

Api

Pubby+Snorql

1

2

3

4

5

Structuring public procurement notices

Transforming government classifications

LOD enrichment

Providing new semantic-based services

Easing the access to thepublished data using the

LOD approach

Semantic

Methods

1,2,3 Structuring the publicprocurement notices and

government classifications

• CPV codes• NUTS codes• Total amount• Duration• Type of enterprise• Others ..

1,2,3 Preliminary Results

Information Triples Total

Common ProcurementVocabulary(2003 y 2008)

278,586 9,230,991

millions of RDF

triples

Organizations ~500,000

NUTS 36,219

Public procurementnotices(2008-2011)

677,058

2,398,601

2,590,880

402,264

4 Semantic -basedServices

Problem of«Query Expansion » depending on the kind of

information variable

Search and Recommend«best notices»

according to the clients profile

4 Methods of«QueryExpansion »

Expansion

Individual

Taxonomy-based

Directly

Syntactic Search

SpreadingActivation

Recommendingengine

Location

Georeasoning

User-based

Numeric

Fuzzy Logic

History-based

Correlation

Group

Recommendingengine

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)?

Query …

?ppn

NUTS-B3 300 RÉG. WALLONNE

cpv:45221111-3

SME170,000 €

cpv:45221111-3 NL

ppn:nutsCode

cpv:CodeIn2008

org:classification ppn:hasAmount

2 years

ppn:hasDuration

Applying Query Expansion …

cpv:45221111-3 NL

?ppn

SME170,000-200,000 €

ppn:nutsCode

cpv:CodeIn2008

org:classification ppn:hasAmount

2-3 years

ppn:hasDuration cpv:45221111-3cpv:45221110-6cpv:45221113-7cpv:45221114-4

NUTS-B3NUTS-NL326NUTS-1025NUTS-BE2

4 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)) ).

…}

4 Resultshttp://purl.org/weso/moldeas/

Jquery+Exhibit!

5Publishing linked data with

WESO DESH & Pubby

5 Graph explorationthrough SNORQL

6 Evaluation and FurtherSteps

• Test ranking functions to sort outresults

• Validation (“pedantic”) of the published data

• Tracking organizations activity• Evaluation of the improvement with

regards to the legacy system

Innovative services to ease the access to the public procurement notices using

linking open data and advanced methods based on semantics

Code: TSI-020100-2010-919

José María Álvarez RodríguezWESO-Universidad de Oviedohttp://purl.org/weso/moldeas/

5th International Conference on Methodologies, Technologies and Tools enabling e-Government

Camerino (Italy)30th of June