This page details how to represent the information definition outlined in Complex and simple types using DCAT2. For example, the queryDatasets operation may return DCAT structured data.

DCAT 2 is used in https://www.europeandataportal.eu/en

Assumptions

DatasetSeries is close to being a DCAT catalog
Dataset is the overarching concept - maps to DCAT Dataset
The actual file maps to DCAT Distribution
Everything is a resource

DCAT2 Elements

Bold rows

Property names marked in bold are where the two DCAT mappings are not harmonised. Some work needs to be done here.

Dataset

Type name	Property name	Definition	Type	DCAT2 (from Scott)	DCAT2 (from Renato)	Profile Notes (from Renato)	ISO 19115:2003
Dataset		Metadata about a dataset.		https://www.w3.org/TR/vocab-dcat-2/#Class:Dataset	dcat:Dataset		DS_DataSet
	id	Identification of the dataset (eg a URI) The identification is unique within a service instance	IdentifierType	https://www.w3.org/TR/vocab-dcat-2/#Property:resource_identifier	dct:identifier	Typically a URI but could also be a string	CI_Citation.identifier
	title	Title of the dataset	string	https://www.w3.org/TR/vocab-dcat-2/#Property:resource_title	dct:title	The name of the dataset	CI_Citation.title
	shortDescription	Free text providing a short description of the dataset	string	https://www.w3.org/TR/vocab-dcat-2/#Property:resource_description	dct:description	The description of the dataset	MD_DataIdentification.abstract)
	type	Indication the main content of the dataset.	CodeDatasetType	https://www.w3.org/TR/vocab-dcat-2/#Property:resource_type Note: with list coming from ICAO Annex 15	dct:type	The type of data contained in the dataset Example: Obstacle Data Set
	subject	Scope of the dataset expressed as a list of subjects .	CodeDataSubjectType	https://www.w3.org/TR/vocab-dcat-2/#Property:resource_theme	dcat:theme (assoc)	The values will need to be represented as URIs Use the PANS AIM data catalogue terms (from App1-1) as URLs: http://icao.int/pans/aim/subject/aerodrome http://icao.int/pans/aim/subject/airspace
	updateType	Indication on how far the dataset has full content or represents an update.	CodeUpdateType	Needed? Agreed that updates not possible.	dct:format	Example: Baseline or Delta (Note: dct:format is an element of the wider Dublin Core metadata set)
	isAiracUpdate	Indication that the dataset has been updated according to the AIRAC System.	boolean	https://www.w3.org/TR/vocab-dcat-2/#Property:resource_keyword Note: with literal "AIRAC"	prov:wasGeneratedBy	Uses an instance of prov:Activity with attribute: prov:used If the dataset was generated as part of the AIRAC cycle, then the value of this attribute will be “AIRAC”.
	limitationsOnUse	Free text clarifying limitations with regard to the use of the dataset.	string	https://www.w3.org/TR/vocab-dcat-2/#Property:resource_access_rights https://www.w3.org/TR/vocab-dcat-2/#Property:resource_license https://www.w3.org/TR/vocab-dcat-2/#Property:resource_rights	odrl:hasPolicy	Uses an instance of odrl:Prohibition with attribute: odrl:action Example: “operational use”	MD_Constraints
	encoding	Standard encoding of the data	CodeDataEncodingType	https://www.w3.org/TR/vocab-dcat-2/#Property:distribution_format Note: this on the distribution.	dct:conformsTo	Example value: AIXM 5.1.1
	effectiveDate	Start of the validity period for the dataset	date	https://www.w3.org/TR/vocab-dcat-2/#Property:dataset_temporal	dct:temporal	Uses an instance of dct:PeriodOfTime with attributes: dcat:startDate (effective date) dcat:endDate (end of validity)
	endValidity	End of the validity period for the dataset. When absent, no end is specified.	date	https://www.w3.org/TR/vocab-dcat-2/#Property:dataset_temporal	dct:temporal	Uses an instance of dct:PeriodOfTime with attributes: dcat:startDate (effective date) dcat:endDate (end of validity)
	publicationDate	Date at which the dataset became available.	date	https://www.w3.org/TR/vocab-dcat-2/#Property:resource_release_date	dct:issued	ISO8601 date fomat
	datasetSeriesId	id of the corresponding dataseries	IdentifierType	https://www.w3.org/TR/vocab-dcat-2/#Property:resource_qualified_relation Note: https://dublincore.org/specifications/dublin-core/dcmi-terms/#isPartOf	dct:isPartOf	Relates the dataset to the Series
	geographicalScope	The locations defining the scope of the dataset	Location	https://www.w3.org/TR/vocab-dcat-2/#Property:dataset_spatial	dct:spatial	Uses an instance of dct:Location with Dublin Core, vCard, and AIXM attributes: dct:type (values: Airport, State, or Airspace) aixm::name (name Airport and Airspace) aixm:designator (designator for Airport and Airspace) aixm:designatorIATA (iataCode for Airport) aixm:type (type of Airspace) vcard:country-name (name for State) vcard:locality (territory for State) vcard:postal-code (code for State) (Note: vCard is one of the recommended DCAT vocabularies.)
	datasetFile	The dataset file that the metadata concerns	File	https://www.w3.org/TR/vocab-dcat-2/#Class:Distribution	dcat:distribution	Uses an instance of a dcat:Distribution with attribute: dcat:downloadURL Example values: file:///donlon-airport-2020-05-05.xml http://example.aero/dataset/2020/05/airport/xml

DatasetSeries

Type name	Property name	Definition	Type	DCAT2 (from Scott)	DCAT2 (from Renato)	Profile Notes (from Renato)
DatasetSeries		Metadata about a dataset series.		https://www.w3.org/TR/vocab-dcat-2/#Class:Catalog	dcat:Catalog
	id	Identification of the dataset series (eg a URI) The identification is unique within a service instance	IdentifierType	https://www.w3.org/TR/vocab-dcat-2/#Property:resource_identifier	dct:identifier
	title	Title of the dataset series	string	https://www.w3.org/TR/vocab-dcat-2/#Property:resource_title	dct:title
	type	Enumeration indicating the main content of the dataset	CodeDatasetType	https://www.w3.org/TR/vocab-dcat-2/#Property:resource_type	dct:type
	dataSubject	Data subject as defined in ICAO PANS-AIM	CodeDataSubjectType	https://www.w3.org/TR/vocab-dcat-2/#Property:resource_theme	dcat:theme (assoc)
	limitationsOnUse	Free text clarifying limitations with regard to the use of the datasets	string	https://www.w3.org/TR/vocab-dcat-2/#Property:resource_access_rights https://www.w3.org/TR/vocab-dcat-2/#Property:resource_license https://www.w3.org/TR/vocab-dcat-2/#Property:resource_rights	odrl:hasPolicy
	encoding	Standard encoding of the data	CodeDataEncodingType	https://www.w3.org/TR/vocab-dcat-2/#Property:distribution_format Note: this on the distribution.	dct:conformsTo
	geographicalScope	The locations defining the scope of the dataset series	Location	https://www.w3.org/TR/vocab-dcat-2/#Property:dataset_spatial	dct:spatial	Links to the related Data Product Specification Document
	DPSId	id of the corresponding data product specification	IdentifierType	https://www.w3.org/TR/vocab-dcat-2/#Property:resource_qualified_relation Note: Need to decide on the type of relationship	dct:isReferencedBy
					dcat:dataset	Links to an instance of a dataset in this series

DataProductSpecification

Type name	Property name	Definition	Type	DCAT (from Scott)	DCAT2 (from Renato)	Profile Notes (from Renato)
DataProductSpecification		Metadata about a Data Product Specification.		https://www.w3.org/TR/vocab-dcat-2/#Class:Resource	dcat:Resource
	id	Identification of the data product specification The identification is unique within a service instance	IdentifierType	https://www.w3.org/TR/vocab-dcat-2/#Property:resource_identifier	dct:identifier
	title	Title of the data product specification	string	https://www.w3.org/TR/vocab-dcat-2/#Property:resource_title	dct:title
	dpsFile	The file that the metadata concerns	File	https://www.w3.org/TR/vocab-dcat-2/#Class:Distribution	dcat:distribution	Uses an instance of a dcat:Distribution with attribute: dcat:downloadURL Example values: file:///donlon-airport-DPS-2020-pdf http://example.aero/dataset/2020/airport.pdf
					dct:type	dct:type used to indicate it is a DPS document type
					dct:references	Used to link to the DatasetSeries

File

Type name	Property name	Definition	Type	DCAT2 (from Scott)
File		Metadata about a file.		https://www.w3.org/TR/vocab-dcat-2/#Class:Distribution
	id	Identification of the dataset file The identification is unique within a service instance	IdentifierType	https://www.w3.org/TR/vocab-dcat-2/#Property:distribution_access_url
	name	Name of the file	FileNameType	https://www.w3.org/TR/vocab-dcat-2/#Property:distribution_title
	format	Format of the file	CodeFileFormatType	https://www.w3.org/TR/vocab-dcat-2/#Property:distribution_format
	size	Size of the file in Bytes.	Number	https://www.w3.org/TR/vocab-dcat-2/#Property:distribution_size

Examples (following Renato)

Describing the Dataset Series

{
  "@id": "http://donlon.aero/dataset/aerodrome.json",
  "@type": "dcat:Catalog",
  "dct:identifier": "aerodrome-series-2020",
  "dct:title": "Donlon Aerodrome Dataset Series 2020",
  "dct:type": "Aerodrome Dataset",
  "dcat:theme": "http://icao.int/pans/aim/subject/aerodrome",
  "dct:conformsTo": "AIXM 5.1.1",
  "dct:dataset": ["http://donlon.aero/dataset/aerodrome/2020/Jan.json",
                  "http://donlon.aero/dataset/aerodrome/2020/Mar.json",
                  "http://donlon.aero/dataset/aerodrome/2020/May.json"],
  "dct:isReferencedBy": "http://donlon.aero/dps/aerodrome.json",
  "dct:spatial": "http://donlon.aero/location/donlon.json"
}

Describing the Location

{
  "@id": "http://donlon.aero/location/donlon.json",
  "@type": "Airport",
  "dct:spatial": [
      {
        "aixm:name": "Donlon International Airport",
        "aixm:designator": "DONDON",
        "aixm:designatorIATA": "ZZZZ"
      }]
}

Describing the May 2020 Dataset

{
  "@id": "http://donlon.aero/dataset/aerodrome/2020/May.json",
  "@type": "dcat:Dataset",
  "dct:identifier": "aerodrome-donlon-2020-may",
  "dct:title": "Donlon Aerodrome Dataset - May 2020",
  "dct:type": "Aerodrome Dataset",
  "dcat:theme": "http://icao.int/pans/aim/subject/aerodrome",
  "dct:format": "Baseline",
  "prov:wasGeneratedBy": [
    {  
        "@type": "prov:Activity",
        "prov:used": "AIRAC" 
    }],
  "odrl:hasPolicy": [
        {
            "@type": "odrl:Prohibition", 
            "odrl:action": "operational-use" 
        }],
  "dct:conformsTo": "AIXM 5.1.1",
  "dct:temporal": [
    {
      "@type": "dct:PeriodOfTime",
      "dct:startDate": "2020-05-01",
      "dct:endDate": "2020-06-30"
    }],
  "dct:issued": "2020-04-01",
  "dct:spatial": "http://donlon.aero/location/donlon.json",
  "dct:isPartOf": "http://donlon.aero/dataset/aerodrome.json",
  "dcat:distribution": [
    {
      "@type": "dcat:Distribution",
      "dcat:downloadURL": "http://donlon.aero/dataset/aerodrome/2020/May/data.xml"
    }]
}

Describing the Data Product Specification

{
    "@id": "http://donlon.aero/dps/aerodrome.json",
    "@type": "dcat:Resource",
    "dct:identifier": "dps-aerodrome-series-2020",
    "dct:title": "Data Product Specification: Donlon Aerodrome Dataset Series 2020",
    "dct:type": "DPS",
    "dca:references": "http://donlon.aero/dataset/aerodrome.json",
    "dcat:distribution": [
        {
          "@type": "dcat:Distribution",
          "dcat:downloadURL": "http://donlon.aero/dps/aerodrome-2020-May.pdf"
        }]
  }

DCAT2 representation