The data catalog vocabulary

RDF/XML version of this vocabulary. Turtle version of this vocabulary.

Author:

Last update:

05 December 2013

Namespace URI:

http://www.w3.org/ns/dcat#

Abstract

DCAT is an RDF vocabulary designed to facilitate interoperability between data catalogs published on the Web. By using DCAT to describe datasets in data catalogs, publishers increase discoverability and enable applications easily to consume metadata from multiple catalogs. It further enables decentralized publishing of catalogs and facilitates federated dataset search across sites. Aggregated DCAT metadata can serve as a manifest file to facilitate digital preservation. DCAT is defined at http://www.w3.org/TR/vocab-dcat/. Any variance between that normative document and this schema is an error in this schema.

All terms at a glance

Overview diagram

DCAT is an RDF vocabulary designed to facilitate interoperability between data catalogs published on the Web. It further enables decentralized publishing of catalogs and facilitates federated dataset search across sites.

Classes

Class: dcat:Catalog

CatalogA curated collection of metadata about datasets

URI:
http://www.w3.org/ns/dcat#Catalog
Properties include:
dcat:themeTaxonomy, dcat:dataset, dcat:record

Class: dcat:CatalogRecord

Catalog RecordA record in a data catalog, describing a single dataset.

URI:
http://www.w3.org/ns/dcat#CatalogRecord
Used with:
dcat:record

Class: dcat:Dataset

DatasetA collection of data, published or curated by a single source, and available for access or download in one or more formats

URI:
http://www.w3.org/ns/dcat#Dataset
Properties include:
dcat:theme, dcat:keyword, dcat:contactPoint, dcat:distribution, dcat:landingPage, dcat:dataQuality, dcat:dataDictionary, dcat:granularity
Used with:
dcat:dataset
Superclass:
dcmitype:Dataset

Class: dcat:Distribution

DistributionRepresents a specific available form of a dataset. Each dataset might be available in different forms, these forms might represent different formats of the dataset or different endpoints. Examples of distributions include a downloadable CSV file, an API or an RSS feed

URI:
http://www.w3.org/ns/dcat#Distribution
Properties include:
dcat:accessURL, dcat:downloadURL, dcat:byteSize, dcat:mediaType, dcat:size, dcat:bytes
Used with:
dcat:distribution
Subclasses:
dcat:Feed, dcat:WebService, dcat:Download

Class: dcat:Download

Download (Deprecated)represents a downloadable distribution of a dataset. This term has been deprecated

URI:
http://www.w3.org/ns/dcat#Download
Superclass:
dcat:Distribution

Class: dcat:Feed

Feed (Deprecated)represents availability of a dataset as a feed. This term has been deprecated

URI:
http://www.w3.org/ns/dcat#Feed
Superclass:
dcat:Distribution

Class: dcat:WebService

Web Service (Deprecated)represents a web service that enables access to the data of a dataset. This term has been deprecated

URI:
http://www.w3.org/ns/dcat#WebService
Superclass:
dcat:Distribution

Properties

Property: dcat:accessURL

access URLCould be any kind of URL that gives access to a distribution of the dataset. E.g. landing page, download, feed URL, SPARQL endpoint. Use when your catalog does not have information on which it is or when it is definitely not a download.

URI:
http://www.w3.org/ns/dcat#accessURL
Domain:
dcat:Distribution
Range:
rdfs:Resource

Property: dcat:byteSize

byte sizeThe size of a distribution in bytes.

URI:
http://www.w3.org/ns/dcat#byteSize
Domain:
dcat:Distribution
Range:
rdfs:Literal

Property: dcat:bytes

size in bytes (Deprecated)describe size of resource in bytes. This term has been deprecated

URI:
http://www.w3.org/ns/dcat#bytes
Domain:
dcat:Distribution
Range:
xsd:integer

Property: dcat:contactPoint

contact pointLinks a dataset to relevant contact information which is provided using VCard.

URI:
http://www.w3.org/ns/dcat#contactPoint
Domain:
dcat:Dataset
Range:
vcard:Kind

Property: dcat:dataDictionary

data dictionary (Deprecated)links a dataset to a dictionary that helps interpreting the data. This term has been deprecated

URI:
http://www.w3.org/ns/dcat#dataDictionary
Domain:
dcat:Dataset

Property: dcat:dataQuality

data quality (Deprecated)describes the quality of data e.g. precision. This should not be used to describe the data collection characteristics, other more specialized statistical properties can be used instead. This term has been deprecated

URI:
http://www.w3.org/ns/dcat#dataQuality
Domain:
dcat:Dataset

Property: dcat:dataset

datasetLinks a catalog to a dataset that is part of the catalog.

URI:
http://www.w3.org/ns/dcat#dataset
Domain:
dcat:Catalog
Range:
dcat:Dataset
Superproperty:
dcterms:hasPart

Property: dcat:distribution

distributionConnects a dataset to one of its available distributions.

URI:
http://www.w3.org/ns/dcat#distribution
Domain:
dcat:Dataset
Range:
dcat:Distribution

Property: dcat:downloadURL

download URLThis is a direct link to a downloadable file in a given format. E.g. CSV file or RDF file. The format is described by the distribution's dc:format and/or dcat:mediaType

URI:
http://www.w3.org/ns/dcat#downloadURL
Domain:
dcat:Distribution
Range:
rdfs:Resource

Property: dcat:granularity

granularity (Deprecated)describes the level of granularity of data in a dataset. The granularity can be in time, place etc. This term has been deprecated

URI:
http://www.w3.org/ns/dcat#granularity
Domain:
dcat:Dataset

Property: dcat:keyword

keywordA keyword or tag describing the dataset.

URI:
http://www.w3.org/ns/dcat#keyword
Domain:
dcat:Dataset
Range:
rdfs:Literal
Superproperty:
dcterms:subject

Property: dcat:landingPage

landing pageA Web page that can be navigated to in a Web browser to gain access to the dataset, its distributions and/or additional information.

URI:
http://www.w3.org/ns/dcat#landingPage
Domain:
dcat:Dataset
Range:
foaf:Document
Superproperty:
foaf:Page

Property: dcat:mediaType

media typeThis property SHOULD be used when the media type of the distribution is defined in IANA, otherwise dct:format MAY be used with different values.

URI:
http://www.w3.org/ns/dcat#mediaType
Domain:
dcat:Distribution
Range:
dcterms:MediaTypeOrExtent
Superproperty:
dcterms:format

Property: dcat:record

recordLinks a catalog to its records.

URI:
http://www.w3.org/ns/dcat#record
Domain:
dcat:Catalog
Range:
dcat:CatalogRecord

Property: dcat:size

size (Deprecated)the size of a distribution. This term has been deprecated

URI:
http://www.w3.org/ns/dcat#size
Domain:
dcat:Distribution
Superproperty:
dcterms:extent

Property: dcat:theme

themeThe main category of the dataset. A dataset can have multiple themes.

URI:
http://www.w3.org/ns/dcat#theme
Domain:
dcat:Dataset
Range:
skos:Concept
Superproperty:
dcterms:subject

Property: dcat:themeTaxonomy

theme taxonomyThe knowledge organization system (KOS) used to classify catalog's datasets.

URI:
http://www.w3.org/ns/dcat#themeTaxonomy
Domain:
dcat:Catalog
Range:
skos:ConceptScheme