Introduction
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This page details how to represent the information definition outlined in Complex and simple types using fields from ISO 19115 and DCAT2. For example, the queryDatasets operation may return DCAT structured data. |
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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 data set catalogues.
- in order to allow implementers using different vocabularies to map to the appropriate term.
Mappings
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| A general mapping from ISO 19115 to DCAT is available at: https://www.w3.org/2015/spatial/wiki/ISO_19115_-_DCAT_-_Schema.org_mapping. The mappings below make use of this where possible. |
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DCAT2 mapping assumptions
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The mappings use ISO 19115:2003. There are more recent versions of the standard available e.g. 19115:2014. This doesn't affect datasets too much. Mapping to the same fields. |
Each table includes:
- the current information definition
- the ISO 19115:2003 field
- the DCAT equivalent
- general notes
Dataset
| Type name | Property name | Definition | Type | ISO 19115:2003 | DCAT2 equivalent | DCAT2 notes | General 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:
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| 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:
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| 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:
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| 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:
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| 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:
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| 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 | DCAT2 notes | General notes |
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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 | DCAT2 notes | General notes |
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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 | DCAT2 notes | General notes |
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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 (using DCAT)
Describing the Dataset Series
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{
"@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
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{
"@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
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{
"@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
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{
"@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"
}]
} |