DCAT
From Just Solve the File Format Problem
DCAT (Data Catalogue vocabulary) is a W3C Recommendation described as being an RDF vocabulary designed to facilitate interoperability between data catalogs published on the Web. The recommendation defines the schema and provides examples for its use.
Identification
RDF-based documents containing key elements of the vocabulary might be probabilistically identified as DCAT, or at least, as a dataset using DCAT vocabulary elements.
A Dataset (collection of data, published or curated by a single agent or identifiable community) example from the recommendation (Turtle):
ex:dataset-001
a dcat:Dataset ;
dcterms:title "Imaginary dataset"@en ;
dcterms:title "Conjunto de datos imaginario"@es ;
dcat:keyword "accountability"@en, "transparency"@en, "payments"@en ;
dcat:keyword "responsabilidad"@es, "transparencia"@es, "pagos"@es ;
dcterms:creator ex:finance-employee-001 ;
dcterms:issued "2011-12-05"^^xsd:date ;
dcterms:modified "2011-12-15"^^xsd:date ;
dcat:contactPoint <http://dcat.example.org/transparency-office/contact> ;
dcterms:temporal [ a dcterms:PeriodOfTime ;
dcat:startDate "2011-07-01"^^xsd:date ;
dcat:endDate "2011-09-30"^^xsd:date ;
];
dcat:temporalResolution "P1D"^^xsd:duration ;
dcterms:spatial <http://sws.geonames.org/6695072/> ;
dcat:spatialResolutionInMeters "30.0"^^xsd:decimal ;
dcterms:publisher ex:finance-ministry ;
dcterms:language <http://id.loc.gov/vocabulary/iso639-1/en> ;
dcterms:accrualPeriodicity <http://purl.org/linked-data/sdmx/2009/code#freq-W> ;
dcat:distribution ex:dataset-001-csv ;
.
A Distriubtion (an accessible form of a dataset such as a downloadable file) example from the recommendation (in Turtle):
ex:dataset-001-csv a dcat:Distribution ; dcat:downloadURL <http://dcat.example.org/files/001.csv> ; dcterms:title "CSV distribution of imaginary dataset 001"@en ; dcterms:title "distribución en CSV del conjunto de datos imaginario 001"@es ; dcat:mediaType <http://www.iana.org/assignments/media-types/text/csv> ; dcat:byteSize "5120"^^xsd:nonNegativeInteger ; .
Implementations
- European DCAT Application Profile: DCAT-AP
