Excerpt
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.

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

Table of Contents

Info

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

Info

title	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)

ISO 19115:2003	DCAT2

(from Renato)

equivalent	Profile

Notes (from Renato)ISO 19115:2003

notes

Dataset

Metadata about a dataset.

DS_DataSet

dcat:Dataset

https://www.w3.org/TR/vocab-dcat-2/#Class:Dataset

dcat:DatasetDS_DataSet

id

Identification of the dataset (eg a URI)
The identification is unique within a service instance

IdentifierType

CI_Citation.identifier

dct:identifier

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

CI_Citation.title

dct:title

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

MD_DataIdentification.abstract)

dct:description

https://www.w3.org/TR/vocab-dcat-2/#Property:resource_

descriptiondct:

description

The description of

the datasetMD_DataIdentification.abstract)

the dataset

type

Indication the main content of the dataset.

CodeDatasetType

dct:type

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

dcat:theme (assoc)

https://www.w3.org/TR/vocab-dcat-2/#Property:resource_

themedcat:

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

dct:format

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

prov:wasGeneratedBy

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

MD_Constraints

odrl:hasPolicy

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

dct:conformsTo

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

dct:temporal

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

dct:temporal

https://www.w3.org/TR/vocab-dcat-2/#Property:dataset_

temporaldct:

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

dct:issued

https://www.w3.org/TR/vocab-dcat-2/#Property:resource_release_date

dct:issued

ISO8601 date fomat

datasetSeriesId

id of the corresponding dataseries

IdentifierType

dct:isPartOf

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

dct:spatial

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

dcat:distribution

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

identifiertypespatial

Type name	Property name	Definition	Type	DCAT2 (from Renato)	Profile Notes (from Renato)ISO 19115:2003	DCAT2 equivalent
DatasetSeries		Metadata about a dataset series.		dcat:Catalog 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	dct:identifier https://www.w3.org/TR/vocab-dcat-2/#Property:resource_	dct: identifier
	title	Title of the dataset series	string	dct:title https://www.w3.org/TR/vocab-dcat-2/#Property:resource_title	dct:title
	type	Enumeration indicating the main content of the dataset	CodeDatasetType	dct:type https://www.w3.org/TR/vocab-dcat-2/#Property:resource_	dct: type
	dataSubject	Data subject as defined in ICAO PANS-AIM CodeDataSubjectType	CodeDataSubjectType	dcat:theme (assoc) 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	odrl:hasPolicy 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	dct:conformsTo 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	dct:spatial https://www.w3.org/TR/vocab-dcat-2/#Property:dataset_	dct: spatial	Links to the related Data Product Specification Document
	DPSId	id of the corresponding data product specification	IdentifierType	dct:isReferencedBy 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)

ISO 19115:2003

DCAT2 equivalent

Profile notes

DataProductSpecification

Metadata about a Data Product Specification.

dcat:Resource

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

dct:identifier

https://www.w3.org/TR/vocab-dcat-2/#Property:resource_

identifierdct:

identifier

title

Title of the data product specification

string

dct:title

https://www.w3.org/TR/vocab-dcat-2/#Property:resource_

titledct:

title

dpsFile

The file that the metadata concerns

File

dcat:distribution

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)

ISO 19115:2003	DCAT2

(from Renato)

equivalent	Profile

Notes (from Renato)

notes
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

Code Block

{
  "@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

Code Block
{ "@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

Code Block

{
  "@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

Code Block

{
    "@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"
        }]
  }

Version	Old Version 24	New Version 25
Changes made by	WILSON Scott	WILSON Scott
Saved on	2020 Nov 09	2021 Feb 02

Versions Compared

Key

Assumptions

DCAT2 Elements

Dataset

DatasetSeries

DataProductSpecification

File

Examples (following Renato)

Describing the Dataset Series

Page Comparison

Versions Compared

Key

Assumptions

DCAT2 Elements

Dataset

DatasetSeries

DataProductSpecification

File

Examples (following Renato)

Describing the Dataset Series