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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

Dataset

Type nameProperty nameDefinitionTypeDCAT2 (from Scott)DCAT2 (from Renato)Profile Notes (from Renato)

Dataset

Metadata about a dataset.

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

dcat:Datasetid

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

IdentifierTypehttps://www.w3.org/TR/vocab-dcat-2/#Property:resource_identifierdct:identifierTypically a URI but could also be a stringtitle

Title of the dataset

string

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

dct:titleThe name of the datasetshortDescription

Free text providing a short description of the dataset

string

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

dct:descriptionThe description of the datasettype

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_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/airspaceupdateType

Indication on how far the dataset has full content or represents an update.

CodeUpdateType (question) 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 with literal "is 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”encoding

Standard encoding of the data

CodeDataEncodingType

---

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

dct:conformsToExample value: AIXM 5.1.1effectiveDate

Start of the validity period for the dataset

date

https://www.w3.org/TR/vocab-dcat-2/#Property:resource_update_date (question)

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_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 https://www.w3.org/TR/vocab-dcat-2/#Property:resource_release_datedct:issuedISO8601 date fomatdatasetSeriesId

id of the corresponding dataseries

IdentifierTypehttps://www.w3.org/TR/vocab-dcat-2/#Property:resource_qualified_relation (question)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_spatialdct: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.)datasetFileThe dataset file that the metadata concernsFilehttps://www.w3.org/TR/vocab-dcat-2/#Class:Distributiondcat: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 nameProperty nameDefinitionTypeDCAT2 (from Scott)DCAT2 (from Renato)Profile Notes (from Renato)

DatasetSeries

Metadata about a dataset series.https://www.w3.org/TR/vocab-dcat-2/#Class:Catalogdcat:Catalogid

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

IdentifierTypehttps://www.w3.org/TR/vocab-dcat-2/#Property:resource_identifierdct:identifiertitle

Title of the dataset series

string https://www.w3.org/TR/vocab-dcat-2/#Property:resource_titledct:titletype

Enumeration indicating the main content of the dataset

CodeDatasetType (question)dct:typedataSubject

Data subject as defined in ICAO PANS-AIM

CodeDataSubjectType https://www.w3.org/TR/vocab-dcat-2/#Property:resource_themedcat: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:hasPolicyencoding

Standard encoding of the data

CodeDataEncodingType

---

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

dct:conformsTogeographicalScope

The locations defining the scope of the dataset series

Location https://www.w3.org/TR/vocab-dcat-2/#Property:dataset_spatialdct:spatialLinks to the related Data Product Specification DocumentDPSId

id of the corresponding data product specification

IdentifierTypehttps://www.w3.org/TR/vocab-dcat-2/#Property:resource_qualified_relation (question)dct:isReferencedBydcat:datasetLinks to an instance of a dataset in this series

DataProductSpecification

Type nameProperty nameDefinitionTypeDCAT (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:Resourcedcat:Resourceid

Identification of the data product specification
The identification is unique within a service instance

IdentifierTypehttps://www.w3.org/TR/vocab-dcat-2/#Property:resource_identifierdct:identifiertitle

Title of the data product specification

string https://www.w3.org/TR/vocab-dcat-2/#Property:resource_titledct:titledpsFileThe file that the metadata concernsFilehttps://www.w3.org/TR/vocab-dcat-2/#Class:Distributiondcat: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.pdfdct:typedct:type used to indicate it is a DPS document typedct:referencesUsed to link to the DatasetSeries

File

Type nameProperty nameDefinitionTypeDCAT2 (from Scott)DCAT2 (from Renato)Profile Notes (from Renato)

File

Metadata about a file.https://www.w3.org/TR/vocab-dcat-2/#Class:Distributionid

Identification of the dataset file

The identification is unique within a service instance

IdentifierTypehttps://www.w3.org/TR/vocab-dcat-2/#Property:distribution_access_urlname

Name of the file

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

Format of the file

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

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"         }]   }

Introduction


Excerpt

This page lists metadata profiles that can be used by an implementer to represent the Aeronautical Data Set Information Definition.


Table of Contents

Profiles


Based on
1ISO 19115ISO 19115 Profile
2DCAT3https://airservicesaustralia.github.io/dcat-profile/