AGROVOC, AGRIS and the CIARD RING,
using RDF vocabularies and technologies for data
interoperability
johannes keizerhttp://aims.fao.org
http://aims.fao.org
johannes keizerhttp://aims.fao.org
AGROVOC http://aims.fao.org/agrovoc
johannes keizerhttp://aims.fao.org
Plant products @en
http://eurovoc.europa.eu/5360
skosxl:prefLabel
skos:broader
skosxl:altLabel
2015-02-03T22:59:45Z
cereals @en
c_8171
c_1474
label
skos:exactMatch
skos:related
skos:definition dcterms:created
“A definition”
rdf:value
“An URL for its source
vb:hasLink
skosxl:literlForm
skosxl:prefLabel skosxl:literlForm
agrontology:isUsedAs
c_3032
food products @enc_3032
food products @en
xl_en_c345
…
…..
xl_en_c3955
xl_jp_c3485
xl_en_c134
植物生産物 @jp
johannes keizerhttp://aims.fao.org
Relationships, Relationshipshttp://aims.fao.org/aos/agrovoc/c_1474.html
johannes keizerhttp://aims.fao.org
johannes keizerhttp://aims.fao.org
Exploitation (agris.fao.org)
johannes keizerhttp://aims.fao.org
http://agris.fao.org
http://agris.fao.org/agris-search/search.do?recordID=PH2011000084
http://agris.fao.org/agris-search/search.do?recordID=PL2003002036
johannes keizerhttp://aims.fao.org
From AGRIS to DBPedia
AGRIS URI
AGROVOC URI
dcterms:subject
DBPedia URI
skos:closeMatchskos:exactMatch
DBPedia Abstract
Wikipedia URL
DBPedia Picture
foaf:isPrimaryTopicOfdbpedia-owl:abstract
foaf:depiction
Entry point!
AGROVOC is the
backbone
johannes keizerhttp://aims.fao.org
SPARQL in action!1. From an AGRIS URI, get the list of the AGROVOC URIs (dcterms:subject)
PREFIX dct: <http://purl.org/dc/terms/>SELECT ?agrWHERE {<AGRIS_Uri> dct:subject ?agr .
}
2. For each AGROVOC URI2.1. Get skos:closeMatch and skos:exactMatch (formal alignments to other thesauri)
PREFIX skos: <http://www.w3.org/2004/02/skos/core#> SELECT?em ?cm {OPTIONAL { <AGROVOC_Uri> skos:exactMatch ?em } . OPTIONAL { <AGROVOC_Uri> skos:closeMatch ?cm } .
}
johannes keizerhttp://aims.fao.org
Get DBPedia
2.2. The JAVA code filters DBPedia URIs, to avoid adding a new FILTER in the SPARQL query (it’s heavy…)
2.3. For each DBPedia URI, query the DBPedia SPARQL endpoint to get information to display in an AGRIS widget
SELECT ?abs ?img ?wiki WHERE {
OPTIONAL {<DBP_Uri> dbpedia-owl:abstract ?abs} . OPTIONAL {<DBP_Uri> foaf:depiction ?img} . OPTIONAL {<DBP_Uri> foaf:isPrimaryTopicOf ?wiki} . FILTER ( (lang(?abs ) =\"en\") || (!bound(?abs)) ) }
johannes keizerhttp://aims.fao.org
The CIARD RING (ring.ciard.info)Interoperability and Linked Data
johannes keizerhttp://aims.fao.org
The RING machine interface – SPARQL
An RDF store is a way of storing data using a machine-readable "grammar" (the Resource Description Framework) and documented semantics (RDF vocabularies).URIsThe URI for each service / dataset is built as follows: [RING-domain]/node/[service-ID].For example: http://ring.ciard.net/node/2417
The RING database is an publicly accessible RDF store of datasets.
SPARQL endpointhttp://ring.ciard.net/sparql1
johannes keizerhttp://aims.fao.org
SPARQL how to: vocabularies used in the RING
The vocabularies used in the RDF store are:
RDF: http://www.w3.org/1999/02/22-rdf-syntax-ns#RDFS: http://www.w3.org/2000/01/rdf-schema# DC: http://purl.org/dc/terms/DCAT: http://www.w3.org/ns/dcat# ADMS: http://www.w3.org/ns/adms# FOAF: http://xmlns.com/foaf/0.1/ DOAP: http://usefulinc.com/ns/doap# SKOS: http://www.w3.org/2004/02/skos/core# VCARD: http://www.w3.org/2006/vcard/ns#
The data model chosen to describe datasets is the
W3C Data Catalog Vocabulary (DCAT)designed to describe datasets
and the forms in which they are exposed, their "distributions"
johannes keizerhttp://aims.fao.org
SPARQL how to: URIs?
All the URIs that you may need in queries are listed on the RING web site
A list of the URIs of all the RING entities (services/datasets, organizations, KOSs etc.): http://ring.ciard.net/entity-uris
A list of the URIs of all RING concepts (countries, topics, regions, protocols etc.): http://ring.ciard.net/concept-uris
johannes keizerhttp://aims.fao.org
Sample query using AGROVOCTo get all datasets on topic "Livestock" using the AGROVOC URI for "Livestock"
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#> PREFIX dc: <http://purl.org/dc/terms/> PREFIX dcat: <http://www.w3.org/ns/dcat#> PREFIX adms: <http://www.w3.org/ns/adms#> PREFIX doap: <http://usefulinc.com/ns/doap#> PREFIX owl: <http://www.w3.org/2002/07/owl#> PREFIX skos: <http://www.w3.org/2004/02/skos/core#> DESCRIBE ?dataset ?distro ?owner ?contact ?topic ?standard ?format ?protocol WHERE { ?dataset rdf:type dcat:Dataset . ?dataset dc:title ?title . ?dataset dcat:distribution ?distro . ?dataset dc:publisher ?owner . ?distro dcat:accessURL ?url . ?dataset dcat:theme ?topic . ?topic owl:sameAs <http://aims.fao.org/aos/agrovoc/c_4397> . OPTIONAL { ?dataset doap:maintainer ?contact } OPTIONAL { ?distro dc:conformsTo ?standard } OPTIONAL { ?distro dc:format ?format } OPTIONAL { ?distro adms:representationTechnique ?protocol } }
URI of the “Livestock” concept in AGROVOC
johannes keizerhttp://aims.fao.org
Example of use: AGRIS RING
1. How AGRIS uses the RING Linked Data
AGRIS (http://agris.fao.org): database of more than 7 million bibliographic references on agricultural research and technology and links to related data resources on the Web.AGRIS retrieves information on AGRIS centers through a SPARQL query run against the RING.<http://ring.ciard.net/node/10687> is the uRI of the AGRIS network in the RING------------------------------
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> PREFIX dc: <http://purl.org/dc/terms/> PREFIX dcat: <http://www.w3.org/ns/dcat#> DESCRIBE ?dataset WHERE { ?dataset rdf:type dcat:Dataset . ?dataset dc:partOf <http://ring.ciard.net/node/10687> } ------------------------------
johannes keizerhttp://aims.fao.org
Example of use: AGRIS RING
2. How to get AGRIS Linked Data bibliographic records for each AGRIS center
In the AGRIS RDF store, all bibliographic records are associated to the corresponding AGRIS center through the dcterms:source property: the URI used to identify the AGRIS center is the RING URI.Any application can therefore retrieve all records belonging to an AGRIS center by running a query against the AGRIS SPARQL endpoint (http://202.45.139.84:10035/catalogs/fao/repositories/agris).------------------------------------PREFIX dcterms: <http://purl.org/terms> DESCRIBE ?rec WHERE { ?rec dcterms:source <http://ring.ciard.net/node/2754> . } -----------------------------------
johannes keizerhttp://aims.fao.org
Acknowledgements
Caterina Caracciolo (AGROVOC)
Valeria Pesce (RING)
Fabrizio Celli (Agris)
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