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.
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 | ISO 19115:2003 | DCAT2 equivalent | Profile notes |
|---|---|---|---|---|---|---|
Dataset | Metadata about a dataset. | DS_DataSet | dcat:Dataset | |||
| id | Identification of the dataset (eg a URI) | 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 | 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) | 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/airspace | ||
| updateType | Indication on how far the dataset has full content or represents an update. | CodeUpdateType | 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" | Uses an instance of prov:Activity with attribute:
| ||
| 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:
| |
| 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:
| ||
| 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:
| ||
| 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:
| ||
| datasetFile | The dataset file that the metadata concerns | File | dcat:distribution | Uses an instance of a dcat:Distribution with attribute:
Example values: file:///donlon-airport-2020-05-05.xml http://example.aero/dataset/2020/05/airport/xml |
Needed? Agreed that updates not possible.DatasetSeries
| Type name | Property name | Definition | Type | ISO 19115:2003 | DCAT2 equivalent | Profile notes |
|---|---|---|---|---|---|---|
DatasetSeries | Metadata about a dataset series. | dcat:Catalog | ||||
| id | Identification of the dataset series (eg a URI) | IdentifierType | dct:identifier https://www.w3.org/TR/vocab-dcat-2/#Property:resource_identifier | |||
| title | Title of the dataset series | string | dct:title | |||
| type | Enumeration indicating the main content of the dataset | CodeDatasetType | dct:type | |||
| dataSubject | Data subject as defined in ICAO PANS-AIM | CodeDataSubjectType | 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 | |||
| 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 | ISO 19115:2003 | DCAT2 equivalent | Profile notes |
|---|---|---|---|---|---|---|
DataProductSpecification | Metadata about a Data Product Specification. | dcat:Resource | ||||
| id | Identification of the data product specification | IdentifierType | dct:identifier https://www.w3.org/TR/vocab-dcat-2/#Property:resource_identifier | |||
| title | Title of the data product specification | string | dct:title | |||
| dpsFile | The file that the metadata concerns | File | dcat:distribution | Uses an instance of a dcat:Distribution with attribute:
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 | ISO 19115:2003 | DCAT2 equivalent | Profile 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
{
"@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"
}]
}