W3c app ld-asun(v5)-final

Linked Data Applications:
examples

Asunción Gómez-Pérez
Facultad de Informática, Universidad Politécnica de Madrid
Campus de Montegancedo sn, 28660 Boadilla del Monte, Madrid
http://www.oeg-upm.net
asun@fi.upm.es

Acknowledgements:
O.Corcho, D. Garijo, D. Vila, L.Vilches, B. Villazón
Work distributed under the license Creative Commons Attribution-Noncommercial-Share Alike 3.0

Día W3C en España. 12 de Enero de 2012

Table of content

1. The concept
2. Foundations
3. The process
4. Examples
• Libraries: http://datos.bne.es
• Geo: http://geo.linkeddata.es/
• Metereology:http://aemet.linkeddata.es/
• Travelling: http://webenemasuno.linkeddata.es/

Día W3C en España, 12 de Enero de 2012 2

Complex queries using data from heterogeneous Web
pages

http://www.bne.es/

http://elviajero.elpais.com/

Cervantes enthusiast from Germany
visiting Madrid and willing to know
more about Cervantes’ work and life

http://www.viaf.org/
http://www.aemet

Día W3C en España, 12 de Enero de 2012 *Picture attribution: http://commons.wikimedia.org/wiki/User:Gugerell 3

BD BD BD IGN BD BD
BD BNE VIAF AEMET Prisa DBpedia Data Integration

BNE

Ubicado en
Alcalá de Henares
1605 El Quijote
Año de Same as
Publicación Autor birthPlace

M. Cervantes Alcalá de Henares
M. Cervantes

M. Cervantes

creator
Year of
publication Don Quixote

1960 Alcalá de Henares
Alcalá de Henares
Translated
into
Temperatura
located guía
Hebrew
20º
Tapas Siglo
de Oro
VIAF


Linked Data

Data & Knowledge
Visualization

Linking

RDF
Generation

Día W3C en España, 12 de Enero de 2012

Table of content

1. The concept
2. Foundations
3. The process
4. Examples
• Metereology:http://aemet.linkeddata.es/


Linked Data: why it is important?

• Facilitate data integration
• From heterogeous sources
• In different formats
• Different granularity
• In different languages
• From different countries

© Slide adapted from “5min Introduction to Linked Data”- Olaf Hartig


Foundations
RDF(S) models Unique identifiers: URI
identify or name a resource

Equivalence links to other datasets
Same As
Data navigation

http://iflastandards.info/ns/fr/frbr/frbrer/C1005 http://iflastandards.info/ns/fr/frbr/frbrer/C1001
Is creator of
Person Cer Work

Is a Is a

Is creator of
Cervantes Cer El Quijote

http://datos.bne.es/resource/XX1718747 http://datos.bne.es/resource/XX3383563

Same As
Same As

Cervantes

http://viaf.org/viaf/17220427
Cervantes

http://dbpedia.org/resource/Miguel_de_Cervantes

Foundations
Aligning Models with Owl EquivalentClass
Person http://schema.org/Person

http://iflastandards.info/ns/fr/frbr/frbrer/C1005 EquivalentClass
Person
Person http://xmlns.com/foaf/0.1/Person

birthPlace

Municipality Municipio
EquivalentClass
http://dbpedia.org/resource/Municipalities_of_Spain http://geo.linkeddata.es/ontology/Municipio

Is a Is a

Alcalá de Henares Same As Alcalá de Henares
http://dbpedia.org/page/Alcal%C3%A1_de_Henares http://geo.linkeddata.es/resource/Alcalá de Henares

Lessons learnt
1. Reuse existing models
2. Align the data and the concepts.


El modelo (Ontología) y los datos (2 datasets)
Lengua

translation
Is creator of birthPlace
Año Obra Person Lugar Ontology
Publication date

Ubicado en

Has subject
Biblioteca

Catalán

translation
Is creator of
birthPlace
1960 El Quijote Cervantes Alcalá de Henares
Publication date

Has subject

Located in Data
Vida de Cervantes
BNE


El modelo (Ontología) y los datos (2 datasets)
Language
http://iflastandards.info/ns/fr/frbr/frbrer/C1002
Ontology

translation
Is creator of
work Person
Año http://iflastandards.info/ns/fr/frbr/frbrer/C1001 http://iflastandards.info/ns/fr/frbr/frbrer/C1005
Publication date
birthPlace
Has subject
Located in http://geo.linkeddata.es/ontology/Municipio

Biblioteca
http://xmlns.com/foaf/0.1/Organization

Catalán
http://datos.bne.es/resource/XX1924295

translation http://geo.linkeddata.es/resource/Alcalá de Henares

Don Quijote de la Mancha
Cervantes Saavedra, Miguel de
Es autor birthPlace
1960 http://datos.bne.es/resource/XX3383563 http://datos.bne.es/resource/XX1718747
Publication date

Has subject

Located in http://datos.bne.es/resource/bimo0002045496

BNE Vida de Miguel de Cervantes Saavedra

http://datos.bne.es/# Data

Table of content

1. The concept Specification

2. Foundations Modelling

3. The process RDF
Generation

4. Examples Links
Generation

Publication

Exploitation


The Ontology: based on IFLA vocabularies

Specification

Modelling

RDF
Generation

Links
Generation

Publication

Exploitation


Marimba uses the ontology to generate RDF

Specification

Modelling

RDF
Generation

Links
Generation

Publication

Exploitation

BNE


Marimba links with other resources:
VIAF, DNB, SUDOC, LIBRIS, DBpedia

http://d-nb.info/gnd/11851993X
Specification
DNB

Modelling http://viaf.org/viaf/17220427
VIAF

Same As
RDF Same As http://dbpedia.org/resource/Miguel_de_Cervantes
Generation
DBpedia
Same As
Links
Generation
http://datos.bne.es/resource/XX1718747

BNE
Publication Same As

Same As
Exploitation http://www.idref.fr/026774771/id
SUDOC

http://libris.kb.se/resource/auth/45369

LIBRIS


Marimba links with other resources:
VIAF, DNB, SUDOC, LIBRIS, DBpedia

Specification

Modelling

RDF
Generation

Links
Generation

Publication

Exploitation


Publicación

Specification

Modelling
Data publication

RDF Metadata publicacion using VOID
Generation

Links
To facilitate the discovery
Generation
• Register in CKAN your dataset
Publication
• Use to sitemap4rdf to generate the site map
Exploitation
• Upload the site map to Google and Sindice


Exploitation

Web Interface
Especification
Specification

Modelling
Model

RDF
Generation
generation

Links
Publication
Generation

SPARQL queries
Exploitation
Publication
URI Cervantes
select distinct COUNT(?Obras) where {

Exploitation http://datos.bne.es/resource/XX1718747 Is author

<http://iflastandards.info/ns/fr/frbr/frbrer/P2010>
?Obras
}

http://linkeddata3.dia.fi.upm.es/bne-demo

http://geo.linkeddata.es/
Uniform access to the Spanish RDF
Specification Geographical Institute Databases Generation

7 geographical DB Geometry2RDF
• Granularity
• Scale
NOR2O
• Multilingual
Geometry
column

W3C 4
Vocabulary

Model O.
hasStatisticalData Statistics
hasLat/Long WGS84 hasLat/Long
SCOVO

on
hydrOntology hasLocation/isLocated FAO

O.
FAO Time
UNESCO Geopolitical
EGM / ERM 4 hasGeometry
hasGeometry
ontology
W3C Time
GeoNames
… GML
Legend

GML 4 Ontology
Specification
Specification 4
Thesaurus


Phase BNE IGN AEMET PRISA INE

hydrontology Scovo
Modeling SSN ontology
Wgs84
DC SIOC Data cube
time

MARiMbA
RDF generation
geometry2rdf
NOR2O CSV parser CSV parser NOR2O

Silk Silk Silk
NOR2O
DBPEDIA
Links DNB DBPEDIA
VIAF Geolinkeddata.es Geolinkeddata.es
generation LIBRIS Geonames
Geolinkeddata.es
DBPEDIA

Publication Pubby
sitemap4rdf

SPARQL
Exploitation map4rdf

Table of content

1. The concept
2. Foundations
3. The process
4. Examples
• http://linkeddata3.dia.fi.upm.es/bne-demo
• Metereology: http://aemet.linkeddata.es/

Results
http://datos.bne.es http://webenemasuno.linkeddata.es/

• Total number of authority records: 4.100.000 • Total number of guides: 27.876
• Total number of bibliographic records: • Total number of posts: 32.502
2.390.140 • Total number of locations: 6.838
• Total number of RDF triples: 58.053.215 • Total number of RDF triples: 9.462.339
• Links (15% authority): 587.520 • Linked sources: 12.750
• Linked sources: DBPedia (6024 links)
• VIAF GeoLinkedData (6726 links)
• SUDOC (Sistema Universitario de
Documentación) FR
• GND (Auth German National Library) GER
• LIBRIS Sweden
• DBPedia

http://geo.linkeddata.es/

Number of geo type phenomenon: 95 (Rivers, mountains, etc.)
Number of geo entities: 155.000
Total number of RDF triples: 21.564.199
Links: 1002 (outlinks) y 6782 (coming)
Linked sources: DBpedia y GeoNames (outlinks)
AEMET y El Viajero (entry)


Lessons learnt
• URI Learn about Linked Data
• Follow existing design guidelines for new URIs with UPM official courses in
• Reuse existing URIs from authoritative sources one week
• Models
• Reuse existing models when available
• Create new models from authoritative sources
• Do not forget to align your model with existing models
• Generation
• Vertical domains usually require specific tools for generation
• Link
• Generic link discovery tools performs well in vertical domains
• Link to other data sets using
bne:Cervantes Dbpedia:cervantes
• Equivalence links (sameAs) sameAs
Person Municipality
• Typed links birthPlace

• Discovery
• Use sitemap4rdf to allow search engines to find your data
• Use an iterative-incremental life cycle in your development


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