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Presentation, document


What is DCAT?

The W3C Dataset Catalog vocabulary (DCAT) is designed to facilitate interoperability between data catalogs published on the Web. It is based on a generic model for catalog contents including 

  • record
  • description of (conceptual) entity
  • related concrete artefacts

DCAT includes properties from the well known Dublin Core metadata element set, which are associated with classes for

(Original 2014 edition of DCAT)

  • Catalog - a set of dataset descriptions and associated catalog records
  • Record - the registration information for an item in the catalog
  • Dataset - the description of a dataset, considered as a conceptual entity
  • Distribution - the description of an actual representation of a dataset, e.g. a file using a specified format
    since a Dataset may be available in more than one format or representation, there is in general a 1:N relationship between Dataset and Distribution

(Upcoming 2019 extension of DCAT)

  • DataService - the description of a facility for discovery, access or processing data or related resources
    • and sub-classes DataDistributionService and DiscoveryService
  • catalogued Resource
    • superclass of Dataset, DataService, and potentially other things that need cataloguing

Where is it used? 

Europe - various APs, incl GeoDCAT-AP

CKAN add-on

Implementation

DCAT is formalised as an RDF vocabulary. 

  • dcat: Classes + skos:Concept/ConceptScheme + foaf:Agent
  • properties from dct, dcat
  • new classes for Services
  • new properties from PROV-O, DQV

Mix and match with any (compatible) RDF

  • ORG
  • SSN/SOSA
  • QB
  • VoID













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