Introduction

Excerpt
This page details how to represent the information definition outlined in Complex and simple types using using fields from ISO 19115 and 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

Purpose

The representations are created:

in order to improve the current information definition. It may be, for example, possible to change the terms and definitions to be more in line with accepted international standards.
- once this has happened, the updated terms and definitions can be used to write requirements on dataset catalogues.
in order to allow implementers using different vocabularies to map to the appropriate term.

Info

title	Bold rows

DCAT2 mapping 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

Property names marked in bold are where the two DCAT mappings are not harmonised. Some work needs to be done here.DCAT3 is currently under development. It can be found at: https://www.w3.org/TR/vocab-dcat-3/

Mappings

Info
A mapping from ISO 19115 to DCAT is available at: https://www.w3.org/2015/spatial/wiki/ISO_19115_-_DCAT_-_Schema.org_mapping

Dataset

Type name	Property name	Definition	Type	ISO 19115:2003	DCAT2 equivalent	Profile notes
Dataset		Metadata about a dataset.		DS_DataSet	dcat:Dataset https://www.w3.org/TR/vocab-dcat-2/#Class: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	Typically a URI but could also be a string
	title	Title of the dataset	string	CI_Citation.title	dct:title https://www.w3.org/TR/vocab-dcat-2/#Property:resource_title	The name of the dataset
	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_description	The description of 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	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_theme	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.	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"	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	Uses an instance of odrl:Prohibition with attribute: odrl:action Example: “operational use”
	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.	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	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_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	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	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	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	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 equivalent	Profile notes
DatasetSeries		Metadata about a dataset series.		dcat:Catalog https://www.w3.org/TR/vocab-dcat-2/#Class: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_identifier
	title	Title of the dataset series	string	dct:title https://www.w3.org/TR/vocab-dcat-2/#Property:resource_title
	type	Enumeration indicating the main content of the dataset	CodeDatasetType	dct:type https://www.w3.org/TR/vocab-dcat-2/#Property:resource_type
	dataSubject	Data subject as defined in ICAO PANS-AIM	CodeDataSubjectType	dcat:theme (assoc) https://www.w3.org/TR/vocab-dcat-2/#Property:resource_theme
	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
	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.
	geographicalScope	The locations defining the scope of the dataset series	Location	dct:spatial https://www.w3.org/TR/vocab-dcat-2/#Property:dataset_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
				dcat:dataset	Links to an instance of a dataset in this series

DataProductSpecification

Type name	Property name	Definition	Type	DCAT2 equivalent	Profile notes
DataProductSpecification		Metadata about a Data Product Specification.		dcat:Resource https://www.w3.org/TR/vocab-dcat-2/#Class: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_identifier
	title	Title of the data product specification	string	dct:title https://www.w3.org/TR/vocab-dcat-2/#Property:resource_title
	dpsFile	The file that the metadata concerns	File	dcat:distribution https://www.w3.org/TR/vocab-dcat-2/#Class: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 equivalent
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

using DCAT)

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 25	New Version 26
Changes made by	WILSON Scott	WILSON Scott
Saved on	2021 Feb 02	2021 Feb 02

Versions Compared

Key

Introduction

Assumptions

Purpose

DCAT2 mapping assumptions

DCAT2 Elements

Mappings

Dataset

DatasetSeries

DataProductSpecification

File

Examples (

using DCAT)

Describing the Dataset Series

Page Comparison

Versions Compared

Key

Introduction

Assumptions

Purpose

DCAT2 mapping assumptions

DCAT2 Elements

Mappings

Dataset

DatasetSeries

DataProductSpecification

File

Examples (

using DCAT)

Describing the Dataset Series