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AGRIS: an RDF-aware system in
the agricultural domain
Fabrizio Celli, Johannes Keizer, Maria
Folch, Armando Stellato
Fabrizio Celli, Food and Agriculture Organization of the United Nations
LOD 2014 – Roma, 20th / 21st Feb 2014
Outline
• What is AGRIS?
• The RDF-ization process
• Interlinking

Fabrizio Celli (FAO) - LOD2014 - Roma
20th/21st Feb 2014

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WHAT IS AGRIS?

Fabrizio Celli (FAO) - LOD2014 - Roma
20th/21st Feb 2014

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One or more definitions?
• A network: AGRIS is collaborative network of
more than 150 institutions from 65 countries
• A database: AGRIS is a multilingual bibliographic
database for agricultural science
• A Web portal: AGRIS (http://agris.fao.org/ ) is a
Web application that links the AGRIS knowledge
to related Web resources using the Linked Open
Data methodology
– Purpose: providing as much information as possible
about a topic within the agricultural domain
Fabrizio Celli (FAO) - LOD2014 - Roma
20th/21st Feb 2014

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The setting
• The AGRIS database is a collection of more than
7.7 million bibliographic references in the
agricultural domain
• They are enhanced by the AGROVOC thesaurus,
which is extensively used by cataloguers to enrich
data indexing in agricultural information systems
• AGROVOC is the FAO multilingual vocabulary
containing more than 40 000 concepts in up to 21
languages. It’s part of the LOD cloud!
Fabrizio Celli (FAO) - LOD2014 - Roma
20th/21st Feb 2014

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The setting (2)
• AGRIS is an RDF-aware system, a mashup
application that allows users to query the
AGRIS content, interlinking all resources to
external sources of information
• 7.7 million bibliographic references result in
190 million triples (~24 triples/reference)
• 7.7 million bibliographic references become
7.7 million mashup pages!
Fabrizio Celli (FAO) - LOD2014 - Roma
20th/21st Feb 2014

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Some statistics
• 7.7 million bibliographic references
• 190 million triples
• ~ 300.000 visits/month
• World wide used (accessed from more than
200 countries)

Fabrizio Celli (FAO) - LOD2014 - Roma
20th/21st Feb 2014

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How data come to AGRIS
• Centralization: bibliographic references in the
AGRIS domain (agriculture, forestry, animal
husbandry, aquatic sciences and fisheries, and
human nutrition)
• Interlinking: other kinds of information
related to the AGRIS domain (statistics, maps,
country profiles, etc.)

Fabrizio Celli (FAO) - LOD2014 - Roma
20th/21st Feb 2014

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Accept any input format!

Fabrizio Celli (FAO) - LOD2014 - Roma
20th/21st Feb 2014

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THE RDF-IZATION PROCESS

Fabrizio Celli (FAO) - LOD2014 - Roma
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The RDF-ization process
• Translation of the AGRIS AP XML database to RDF
– Selection of existing vocabularies to model triples
(when desired properties are already available)
– Creation of new properties when needed
– Data cleaning and normalization
– Index all records with the Agrovoc thesaurus, to help
interlinking to other datasets
– Run the conversion and publish RDF data!

• Selection of external datasets we want to
interlink to AGRIS
Fabrizio Celli (FAO) - LOD2014 - Roma
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An AGRIS AP XML record
<ags:resource ags:ARN="CN2009002389">
<dc:title xml:lang="en">Study on the mortality and competition of …</dc:title>
<dc:title xml:lang="Zh">
<dcterms:alternative>典型草原三种蝗虫种群死亡率和竞争的研究</dcterms:alternative>
</dc:title>
<dc:creator>
<ags:creatorPersonal>Lu Hui</ags:creatorPersonal>
<ags:creatorPersonal>Han Jianguo</ags:creatorPersonal>
</dc:creator>
<dc:date><dcterms:dateIssued>Sep. 2008</dcterms:dateIssued></dc:date>
<dc:subject>
<ags:subjectThesaurus scheme="ags:AGROVOC" xml:lang="en">ACRIDIDAE</ags:subjectThesaurus>
</dc:subject>
<dc:description>
<dcterms:abstract xml:lang="Zh">通过田间...</dcterms:abstract>
<dcterms:abstract xml:lang="En">The three ...</dcterms:abstract>
</dc:description>
<dc:language scheme="ags:ISO639-1">Zh</dc:language>
<ags:citation>
<ags:citationTitle xml:lang="Zh">Acta Agrestia Sinica</ags:citationTitle>
<ags:citationIdentifier scheme="ags:ISSN">1007-0435</ags:citationIdentifier>
</ags:citation>
</ags:resource>
Fabrizio Celli (FAO) - LOD2014 - Roma
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Translation to RDF
• Assign a unique, permanent URI to the AGRIS record:
http://agris.fao.org/aos/records/CN2009002389

• The URI should be dereferentiable, i.e. used in a
browser, it should return the description of the resource
• Other URIs: Agrovoc keywords, AGRIS journals

Fabrizio Celli (FAO) - LOD2014 - Roma
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AGRIS RDF
bibo:Article
bibo:abstract
bibo:doi
bibo:isbn
bibo:presentedAt ->
bibo:Conference -> dct:title
bibo:uri
dct:alternative
dct:creator ->
foaf:organization -> foaf:name
dct:creator ->
foaf:Person -> foaf:name
dct:dateSubmitted

dct:description
dct:extent
dct:identifier
dct:language
dct:isPartOf
dct:issued
dct:publisher ->
foaf:Organization -> foaf:name
dct:source
dct:subject
dct:title
dct:type
dct:rights

Fabrizio Celli (FAO) - LOD2014 - Roma
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RDF/XML snapshot

Fabrizio Celli (FAO) - LOD2014 - Roma
20th/21st Feb 2014

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The process
Java
programming

«OpenAGRIS: using bibliographical data for linking into the agricultural knowledge
web»; Fabrizio Celli, Stefano Anibaldi, Maria Folch, Yves Jaques, Johannes Keizer.
Fabrizio Celli (FAO) - LOD2014 - Roma
20th/21st Feb 2014

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Provenance
• AGRIS records come with an identifier (ARN)
which has a predefined structure and contains
implicit information about the data source
together with the bibliographic record’s year of
creation
• “IT 2008 0 00091” refers to the 91st record
created in 2008 by the AGRIS data provider in
Italy (IT 0)
• Data providers information are stored in the
CIARD RING (http://ring.ciard.net/ ) and
published as RDF
Fabrizio Celli (FAO) - LOD2014 - Roma
20th/21st Feb 2014

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INTERLINKING

Fabrizio Celli (FAO) - LOD2014 - Roma
20th/21st Feb 2014

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Interlinking
• Centralization: bibliographic references in the
AGRIS domain (agriculture, forestry, animal
husbandry, aquatic sciences and fisheries, and
human nutrition)
• Interlinking: other kinds of information
related to the AGRIS domain (statistics, maps,
country profiles, etc.)

Fabrizio Celli (FAO) - LOD2014 - Roma
20th/21st Feb 2014

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What good is AGROVOC?
• AGROVOC is the backbone, the magic that
allows the interlinking to external datasets
• Two ways to implement the interlinking:
– Using AGROVOC formal aligments to other
thesauri (skos:exactMatch, skos:closeMatch)
– Querying external WebServices with scientific
names, extracted from AGROVOC (no RDF, simply
Java programming)
Fabrizio Celli (FAO) - LOD2014 - Roma
20th/21st Feb 2014

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Fabrizio Celli (FAO) - LOD2014 - Roma
20th/21st Feb 2014

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The IFPRI case
(International Food Policy Research Institute )

A user queries the
system

AGRIS record with
Agrovoc keywords

At least one Agrovoc
keyword is a Country name

The system queries IFPRI sparql endpoint
(http://data.ifpri.org/sparql/ ) to retrieve the
global hunger index (GHI) and the child
mortality rate related to the Country

Fabrizio Celli (FAO) - LOD2014 - Roma
20th/21st Feb 2014

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AGRIS RDF RECORD

AGROVOC

Fabrizio Celli (FAO) - LOD2014 - Roma
20th/21st Feb 2014

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Bibliography
• «OpenAGRIS: using bibliographical data for linking into the
agricultural knowledge web». Fabrizio Celli, Stefano Anibaldi, Maria
Folch, Yves Jaques, Johannes Keizer. AOS 2011
• «Proof and Trust in the OpenAGRIS Implementation». Yves Jaques,
Stefano Anibaldi, Fabrizio Celli, Imma Subirats, Armando Stellato,
Johannes Keizer. DC-2012
• «Pushing, Pulling, Harvesting, Linking - Rethinking Bibliographic
Workflows for the Semantic Web». Fabrizio Celli, Yves Jaques,
Stefano Anibaldi, Johannes Keizer. EFITA-2013
• «Migrating bibliographic datasets to the Semantic Web: The AGRIS
case». Stefano Anibaldi, Yves Jaques, Fabrizio Celli, Armando
Stellato, Johannes Keizer. Semantic Web journal

Fabrizio Celli (FAO) - LOD2014 - Roma
20th/21st Feb 2014

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Thank you !

Fabrizio Celli (FAO) - LOD2014 - Roma
20th/21st Feb 2014

25

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AGRIS: an RDF-aware system in the agricultural domain

  • 1. AGRIS: an RDF-aware system in the agricultural domain Fabrizio Celli, Johannes Keizer, Maria Folch, Armando Stellato Fabrizio Celli, Food and Agriculture Organization of the United Nations LOD 2014 – Roma, 20th / 21st Feb 2014
  • 2. Outline • What is AGRIS? • The RDF-ization process • Interlinking Fabrizio Celli (FAO) - LOD2014 - Roma 20th/21st Feb 2014 2
  • 3. WHAT IS AGRIS? Fabrizio Celli (FAO) - LOD2014 - Roma 20th/21st Feb 2014 3
  • 4. One or more definitions? • A network: AGRIS is collaborative network of more than 150 institutions from 65 countries • A database: AGRIS is a multilingual bibliographic database for agricultural science • A Web portal: AGRIS (http://agris.fao.org/ ) is a Web application that links the AGRIS knowledge to related Web resources using the Linked Open Data methodology – Purpose: providing as much information as possible about a topic within the agricultural domain Fabrizio Celli (FAO) - LOD2014 - Roma 20th/21st Feb 2014 4
  • 5. The setting • The AGRIS database is a collection of more than 7.7 million bibliographic references in the agricultural domain • They are enhanced by the AGROVOC thesaurus, which is extensively used by cataloguers to enrich data indexing in agricultural information systems • AGROVOC is the FAO multilingual vocabulary containing more than 40 000 concepts in up to 21 languages. It’s part of the LOD cloud! Fabrizio Celli (FAO) - LOD2014 - Roma 20th/21st Feb 2014 5
  • 6. The setting (2) • AGRIS is an RDF-aware system, a mashup application that allows users to query the AGRIS content, interlinking all resources to external sources of information • 7.7 million bibliographic references result in 190 million triples (~24 triples/reference) • 7.7 million bibliographic references become 7.7 million mashup pages! Fabrizio Celli (FAO) - LOD2014 - Roma 20th/21st Feb 2014 6
  • 7. Some statistics • 7.7 million bibliographic references • 190 million triples • ~ 300.000 visits/month • World wide used (accessed from more than 200 countries) Fabrizio Celli (FAO) - LOD2014 - Roma 20th/21st Feb 2014 7
  • 8. How data come to AGRIS • Centralization: bibliographic references in the AGRIS domain (agriculture, forestry, animal husbandry, aquatic sciences and fisheries, and human nutrition) • Interlinking: other kinds of information related to the AGRIS domain (statistics, maps, country profiles, etc.) Fabrizio Celli (FAO) - LOD2014 - Roma 20th/21st Feb 2014 8
  • 9. Accept any input format! Fabrizio Celli (FAO) - LOD2014 - Roma 20th/21st Feb 2014 9
  • 10. THE RDF-IZATION PROCESS Fabrizio Celli (FAO) - LOD2014 - Roma 20th/21st Feb 2014 10
  • 11. The RDF-ization process • Translation of the AGRIS AP XML database to RDF – Selection of existing vocabularies to model triples (when desired properties are already available) – Creation of new properties when needed – Data cleaning and normalization – Index all records with the Agrovoc thesaurus, to help interlinking to other datasets – Run the conversion and publish RDF data! • Selection of external datasets we want to interlink to AGRIS Fabrizio Celli (FAO) - LOD2014 - Roma 20th/21st Feb 2014 11
  • 12. An AGRIS AP XML record <ags:resource ags:ARN="CN2009002389"> <dc:title xml:lang="en">Study on the mortality and competition of …</dc:title> <dc:title xml:lang="Zh"> <dcterms:alternative>典型草原三种蝗虫种群死亡率和竞争的研究</dcterms:alternative> </dc:title> <dc:creator> <ags:creatorPersonal>Lu Hui</ags:creatorPersonal> <ags:creatorPersonal>Han Jianguo</ags:creatorPersonal> </dc:creator> <dc:date><dcterms:dateIssued>Sep. 2008</dcterms:dateIssued></dc:date> <dc:subject> <ags:subjectThesaurus scheme="ags:AGROVOC" xml:lang="en">ACRIDIDAE</ags:subjectThesaurus> </dc:subject> <dc:description> <dcterms:abstract xml:lang="Zh">通过田间...</dcterms:abstract> <dcterms:abstract xml:lang="En">The three ...</dcterms:abstract> </dc:description> <dc:language scheme="ags:ISO639-1">Zh</dc:language> <ags:citation> <ags:citationTitle xml:lang="Zh">Acta Agrestia Sinica</ags:citationTitle> <ags:citationIdentifier scheme="ags:ISSN">1007-0435</ags:citationIdentifier> </ags:citation> </ags:resource> Fabrizio Celli (FAO) - LOD2014 - Roma 20th/21st Feb 2014 12
  • 13. Translation to RDF • Assign a unique, permanent URI to the AGRIS record: http://agris.fao.org/aos/records/CN2009002389 • The URI should be dereferentiable, i.e. used in a browser, it should return the description of the resource • Other URIs: Agrovoc keywords, AGRIS journals Fabrizio Celli (FAO) - LOD2014 - Roma 20th/21st Feb 2014 13
  • 14. AGRIS RDF bibo:Article bibo:abstract bibo:doi bibo:isbn bibo:presentedAt -> bibo:Conference -> dct:title bibo:uri dct:alternative dct:creator -> foaf:organization -> foaf:name dct:creator -> foaf:Person -> foaf:name dct:dateSubmitted dct:description dct:extent dct:identifier dct:language dct:isPartOf dct:issued dct:publisher -> foaf:Organization -> foaf:name dct:source dct:subject dct:title dct:type dct:rights Fabrizio Celli (FAO) - LOD2014 - Roma 20th/21st Feb 2014 14
  • 15. RDF/XML snapshot Fabrizio Celli (FAO) - LOD2014 - Roma 20th/21st Feb 2014 15
  • 16. The process Java programming «OpenAGRIS: using bibliographical data for linking into the agricultural knowledge web»; Fabrizio Celli, Stefano Anibaldi, Maria Folch, Yves Jaques, Johannes Keizer. Fabrizio Celli (FAO) - LOD2014 - Roma 20th/21st Feb 2014 16
  • 17. Provenance • AGRIS records come with an identifier (ARN) which has a predefined structure and contains implicit information about the data source together with the bibliographic record’s year of creation • “IT 2008 0 00091” refers to the 91st record created in 2008 by the AGRIS data provider in Italy (IT 0) • Data providers information are stored in the CIARD RING (http://ring.ciard.net/ ) and published as RDF Fabrizio Celli (FAO) - LOD2014 - Roma 20th/21st Feb 2014 17
  • 18. INTERLINKING Fabrizio Celli (FAO) - LOD2014 - Roma 20th/21st Feb 2014 18
  • 19. Interlinking • Centralization: bibliographic references in the AGRIS domain (agriculture, forestry, animal husbandry, aquatic sciences and fisheries, and human nutrition) • Interlinking: other kinds of information related to the AGRIS domain (statistics, maps, country profiles, etc.) Fabrizio Celli (FAO) - LOD2014 - Roma 20th/21st Feb 2014 19
  • 20. What good is AGROVOC? • AGROVOC is the backbone, the magic that allows the interlinking to external datasets • Two ways to implement the interlinking: – Using AGROVOC formal aligments to other thesauri (skos:exactMatch, skos:closeMatch) – Querying external WebServices with scientific names, extracted from AGROVOC (no RDF, simply Java programming) Fabrizio Celli (FAO) - LOD2014 - Roma 20th/21st Feb 2014 20
  • 21. Fabrizio Celli (FAO) - LOD2014 - Roma 20th/21st Feb 2014 21
  • 22. The IFPRI case (International Food Policy Research Institute ) A user queries the system AGRIS record with Agrovoc keywords At least one Agrovoc keyword is a Country name The system queries IFPRI sparql endpoint (http://data.ifpri.org/sparql/ ) to retrieve the global hunger index (GHI) and the child mortality rate related to the Country Fabrizio Celli (FAO) - LOD2014 - Roma 20th/21st Feb 2014 22
  • 23. AGRIS RDF RECORD AGROVOC Fabrizio Celli (FAO) - LOD2014 - Roma 20th/21st Feb 2014 23
  • 24. Bibliography • «OpenAGRIS: using bibliographical data for linking into the agricultural knowledge web». Fabrizio Celli, Stefano Anibaldi, Maria Folch, Yves Jaques, Johannes Keizer. AOS 2011 • «Proof and Trust in the OpenAGRIS Implementation». Yves Jaques, Stefano Anibaldi, Fabrizio Celli, Imma Subirats, Armando Stellato, Johannes Keizer. DC-2012 • «Pushing, Pulling, Harvesting, Linking - Rethinking Bibliographic Workflows for the Semantic Web». Fabrizio Celli, Yves Jaques, Stefano Anibaldi, Johannes Keizer. EFITA-2013 • «Migrating bibliographic datasets to the Semantic Web: The AGRIS case». Stefano Anibaldi, Yves Jaques, Fabrizio Celli, Armando Stellato, Johannes Keizer. Semantic Web journal Fabrizio Celli (FAO) - LOD2014 - Roma 20th/21st Feb 2014 24
  • 25. Thank you ! Fabrizio Celli (FAO) - LOD2014 - Roma 20th/21st Feb 2014 25