Statistical Linked Data Overview

Statistical Linked Data

Boris Villazón-Terrazas
Facultad de Informática, Universidad Politécnica de Madrid
Campus de Montegancedo sn 28660 Boadilla del Monte Madrid
sn, Monte,
http://www.oeg-upm.net
bvillazon@fi.upm.es
Phone: 34.91.3366605, Fax: 34.91.3524819
Slides available at: http://www.slideshare.net/boricles/

Acknowledgements: Local Government Management Services
Board - Ireland, Michael Hausenblas, Richard Cyganiak, Oscar
Corcho, Asunción Gómez-Pérez

WorkdistributedunderthelicenseCreativeCommonsAttribution-
Noncommercial-Share Alike 3.0

Specification – Spreadsheet about statistics

• Service Indicators of Ireland

3

Specification – Spreadsheet about statistics

• Service Indicators of Ireland
• Data for 2009

4

Specification - URI design

• Base URI

• http://stats.data-gov.ie

• TBOX URI

• We use the RDF Data Cube Vocabulary

• ABOX URI

• http:// stats.data-gov.ie /data/{resourceType}/{resource}

5

Vocabularies for modelling statistical data

• SCOVO
• Michael Hausenblas, Danny Ayers, Lee Feigenbaum, Tom
Heath,
Heath Wolfgang Halb Y es Raimond 2008
Halb, Yves Raimond,
• It is deprecated

http://purl.org/NET/scovo
http://purl org/NET/scovo

• SDMX – RDF
• Richard Cyganiak, Chris Dollin, Dave Reynolds, 2010
• Provides a general means to publish statistical data in RDF
(exploiting the SDMX information model).
http://publishing-statistical-data.googlecode.com/svn/trunk/specs/src/main/html/index.html

7

Vocabularies for modelling statistical data
• RDF Data Cube
• Richard Cyganiak, Dave Reynolds, Jeni Tennison, 2010

• SDMX is massive, and many parts of the standard are not
really relevant for the kind of web-based data publishing that
RDF excels in. So they identified a core of SDMX that
seemed most relevant for data publishing, called that core
“Data Cube”, and published it separately.

• W3C Government Linked Data Working group is going to
propose RDF Data Cube for modelling government statistical
data.

http://linked-statistics.org/datacube/
http://linked statistics org/datacube/

8

RDF Data Cube Vocabulary

qb http://purl.org/linked-data/cube#

9

RDF Data Cube – Main elements

10

RDF Data Cube - Concepts

rdf:type

skos:Concept

stats:concept/f
rdf:type
df t
skos:broader skos:broader

rdf:type stats:concept/f-1 stats:concept/f-2

rdf:type skos:broader

stats:concept/f 1 2
stats:concept/f-1-2 rdf:http://www.w3.org/1999/02/22-rdf-syntax-ns#
rdf:http://www w3 org/1999/02/22 rdf syntax ns#
skos: http://www.w3.org/2004/02/skos/core#
stats: http://stats.data-gov.ie/data/
12

RDF Data Cube - Properties

qb:MeasureProperty

rdf:type

rdfs:subPropertyOf
stats:property/f-1-2
/f qb:obsValue

qb:concept
b t rdfs:label
rdfs:range

stats:concept/f-1-2 xsd:double “Average time …”

rdf: http://www.w3.org/1999/02/22-rdf-syntax-ns#
rdfs: http://www.w3.org/2000/01/rdf-schema#
qb: http://purl.org/linked-data/cube#
13

RDF Data Cube – Data structure definition

qb:DataStructureDefinition

rdf:type
qb:component

stats:dsd/f-1-2 stats:componet/geoArea
p g

qb:component

stats:componet/refPeriod
q
qb:component
p

stats:componet/f-1-2 rdf: http://www.w3.org/1999/02/22-rdf-syntax-ns#
http://purl org/linked data/cube#

14

RDF Data Cube – DataSet

qb:DataSet

rdf:type
qb:structure
stats:data/f-1-2 stats:dsd/f-1-2

qb:dataSet qb:dataSet

stats:data/f-1- …… stats:data/f-1-
2/2009/county/donegal 2/2009/county/cavan

rdf:type rdf:type

qb:Observation rdf: http://www.w3.org/1999/02/22-rdf-syntax-ns#
15

RDF Data Cube – Observation
rdf: http://www.w3.org/1999/02/22-rdf-syntax-ns#
property: http://stats.data-gov.ie/property/
sdmx-dimension: http://purl.org/linked-data/sdmx/2009/dimension#

http://reference.data.gov
.uk/id/year/2009

sdmx-dimension:refPeriod

qb:dataSet rdf:type
stats:data/f-1-
stats:data/f-1-2 qb:Observation
2/2009/county/donegal

property:geoArea property:f-1-2

http://geo.data-
http://geo data-
gov.ie/county/donegal 5.29

16

Fuseki endpoint

• http://data-gov.ie/sparql

18

Fuseki endpoint
• N
Now you can play a bit with SPARQL … ;)
l ith )

• What is the value of the Service Indicator F 2 1
F-2-1
(Percentage of cases in respect of fire in which first
attendance is at the scene within 10 minutes) in the
County of D
C f Donegal?l?
PREFIX data: <http://stats.data-gov.ie/data/>
PREFIX qb: <http://purl.org/linked-data/cube#>
qb ttp //pu o g/ ed data/cube#
PREFIX sdmx-dimension : <http://purl.org/linked-data/sdmx/2009/dimension#>
PREFIX property: <http://stats.data-gov.ie/property/>
SELECT ?obs ?ds ?val
WHERE {
?obs a qb:Observation .
?obs sdmx-dimension :refPeriod <http://reference.data.gov.uk/id/year/2009> .
?obs property:geoArea <http://geo.data-gov.ie/county/donegal> .
?obs qb:dataSet ?ds .
?obs property:f-2-1 ?val .
}
19

Metadata publication – VoID
• VoID description
• void.ttl

http://www.w3.org/TR/void/
20

sitemap4rdf

• Simple command line tool
• Sends a SPARQL query to list all URIs
• Generates sitemap

sitemap4rdf http://yoursite/sparql http://yoursite/resource/

Example:

sitemap4rdf http://geo.linkeddata.es/sparql http://geo.linkeddata.es/
sitemap4rdf http://data-gov.ie/sparql http://stats.data-gov.ie

• run sitemap4rdf specifying the SPARQL endpoint
and the prefix of the URLs to include in the Sitemap

21

Exploitation

http://county-rank.data-gov.ie/

23

Information about the County

24

Service Indicators - II

26

Service Indicators - III

27

Statistical Linked Data Overview

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