1. Data Integration,
A Linked Data Approach
Boris Villazón-Terrazas
@boricles
Slides available at: http://www.slideshare.net/boricles/

2. 2
ToC
» Introduction
» Linked Data
» Use Cases

3. 3
Introduction
 Current data systems combine data from a tremendous number
of resources
….

4. 4
Introduction
 We use the term data shape to refer on how data is arranged
and structured.
resource data shape
1. Michael Hausenblas, Boris Villazon-Terrazas, Richard Cyganiak. Data shapes and data transformations.
arXiv preprint arXiv:1211.1565
Fundamental data shapes
• tabular
• tree
• graph

5. 5
Introduction
 Data Integration

6. 6
Classic Web
MovieDB
CIA
World
FactBook
Data exposed to
the Web via
HTML, pdf, etc.
© Slide adapted from “5min Introduction to Linked Data”- Olaf Hartig

7. 7
Classic Web
Information from
single pages
can be found via
search engines
Complex queries
over multiple
pages / data
sources?
© Slide adapted from “5min Introduction to Linked Data”- Olaf Hartig

8. 8
What do we actually want?
Use the Web like a single global database
Move from a Web of documents to a Web of Data
MovieDB
CIA
World
FactBook
© Slide adapted from “5min Introduction to Linked Data”- Olaf Hartig

9. 9
Linked Data enables such Web of Data
MovieDB
CIA
World
FactBook
Global Identifier: URI (Uniform Resource Identifier), which is a string of characters used
to identify a name or a resource on the Internet.
http://cia.../Bolivia
http://imdb.../TLLuvia
Data Model: RDF (Resource Description Framework), which is a standard model
for data interchange on the Web
http://.../population
http://.../name
8000000
“Even the Rain”
Access Mechanism: HTTP
Connection: Typed Links
http://.../filming_location
© Slide adapted from “5min Introduction to Linked Data”- Olaf Hartig

10. 11
Exploitation
Streaming resources

11. 12
Enterprise Linked Data
 Linked Data is not necessarily free data
 Enterprises have many disparate data sources and data
silos
 Linked Data allows having global identifiers for data that
can be accessed using the Web infrastructure and typed
links between data possibly from different applications
 Graph-based RDF data model allows consuming and
merging data without having to do complex structural
transformation

12. 13
Enterprise Linked Data
Office A
Office B
Office C
Products
Company 1
Agency A
Services
Agency B
Company 2

13. 14
GeoLinkedData Ecuador – http://geo.linkeddata.ec
Image taken from http://www.spatialytics.org/projects/geokettle/
RDF Generator Plugins
• GeoKettle
- Spatially-enabled version of the generic ETL tool, Kettle (Pentaho Data
Integration)
- Powerful, metadata-driven spatial ETL tool dedicates to the integration of
different geospatial data resources
Extract
Transform
Load

14. 15
Publication and exploitation
Parliament
SPARQL
http://purl.org/Ecuador/geo/sparql
Rivers of the province of Guayas
PREFIX geo: <http://www.opengis.net/ont/geosparql#>
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX geof: <http://www.opengis.net/def/function/geosparql/>
PREFIX sf: <http://www.opengis.net/ont/sf#>
PREFIX units: <http://www.opengis.net/def/uom/OGC/1.0/>
SELECT distinct ?r ?label ?Figure ?r2 ?Figure2
WHERE {
?r rdf:type <http://geo.linkeddata.ec/ontology/riosdobles_promsa>.
?r rdfs:label ?label.
?r geo:hasGeometry ?geo.
?geo rdf:type ?geoType .
?geo geo:asWKT ?Figure.
?r2 rdf:type <http://geo.linkeddata.ec/ontology/provincias_promsa>.
?r2 rdfs:label "GUAYAS"@es.
?r2 geo:hasGeometry ?geo2.
?geo2 rdf:type ?geoType2 .
?geo2 geo:asWKT ?Figure2.
FILTER (geof:sfIntersects(?Figure2, ?Figure)).
}

15. 16
Publication and exploitation
Parliament
SPARQL
Rivers of the province of Guayas
PREFIX geo: <http://www.opengis.net/ont/geosparql#>
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX geof: <http://www.opengis.net/def/function/geosparql/>
PREFIX sf: <http://www.opengis.net/ont/sf#>
PREFIX units: <http://www.opengis.net/def/uom/OGC/1.0/>
SELECT distinct ?r ?label ?Figure ?r2 ?Figure2
WHERE {
?r a <http://geo.linkeddata.ec/ontology/riosdobles_promsa>.
?r rdfs:label ?label.
?r geo:hasGeometry ?geo.
?geo rdf:type ?geoType .
?geo geo:asWKT ?Figure.
?r2 a <http://geo.linkeddata.ec/ontology/provincias_promsa>.
?r2 rdfs:label "GUAYAS"@es.
?r2 geo:hasGeometry ?geo2.
?geo2 rdf:type ?geoType2 .
?geo2 geo:asWKT ?Figure2.
FILTER (geof:sfIntersects(?Figure2, ?Figure)).
}
http://200.0.31.28:8081/map4rdf-0.0.4-OL-SNAPSHOT/#dashboard

16. 17
iSOCO, tentative example
Enterprise Linked Data
Data Source
iSOCO ICM
Data Soource
iSOCO Lab
Data Source
iSOCO ST
Linked Data
Platform
External
data sources
Added value services

17. 18
http://datosenlazados.org/cms/
http://linkeddata.ec/

18. 19

19. Data Integration,
A Linked Data Approach
Boris Villazón-Terrazas
@boricles
Slides available at: http://www.slideshare.net/boricles/