Introduction

Purpose

The profiles 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

Each table includes:

• the current information definition
• the ISO 19115:2003 field
• the DCAT3 equivalent
• general notes. This column also contains ideas for change requests.

Dataset

Dataset

MD_Metadata

describing resource of type DS_DataSet

dcat:Dataset

https://www.w3.org/TR/vocab-dcat-3/#Class:Dataset

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

@id

• The Identifier of the Dataset

Title of the dataset

dct:title

https://www.w3.org/TR/vocab-dcat-3/#Property:resource_title

• The Title of the Dataset

Free text providing a short description of the dataset

dct:description

https://www.w3.org/TR/vocab-dcat-3/#Property:resource_description

• A Description of the Dataset

Indication the main content of the dataset.

dct:type

https://www.w3.org/TR/vocab-dcat-3/#Property:resource_type

• The (release) Type of the Dataset (using identified vocabulary terms)

Can this be bundled into an overall classification scheme?

• Note: with list coming from ICAO Annex 15

Note: The different forms of ICAO data sets are listed in ICAO Annex 15 5.3.1.1: 

a) AIP data set;
b) terrain data sets;
c) obstacle data sets;
d) aerodrome mapping data sets; and
e) instrument flight procedure data sets. 

Scope of the dataset expressed as a list of subjects .

dcat:theme

https://www.w3.org/TR/vocab-dcat-3/#Property:resource_theme

• The subject theme of the Dataset (using identified vocabulary terms)

The list of possible terms should be registered/published in order to allow URLs to be used. Recommendation is to use a controlled vocabulary.

Consider using AIRM identifiers for resources e.g.

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

• The collection method of the Dataset (using identified vocabulary terms)

Indication that the dataset has been updated according to the AIRAC System.

MD_DataIdentification.extent.EX_Extent.description

Note: this is the same approach as used in DS-META-004 - Indication that this is an AIRAC update

dct:accrualMethod

• The encoding conformance of the Dataset (using identified vocabulary terms)

The definition of this term makes it clear that it is a statement of the process used to update the data. That is why prov is used.

Consider using AIRM identifiers for resources e.g.

prov:wasGeneratedBy": "urn:aero:airm:1.0.0:ContextualModel:ATMBusinessTerms:AIRAC"

Free text clarifying limitations with regard to the use of the dataset.

MD_DataIdentification.resourceConstraints.MD_Constraints.useLimitations

Can also use e.g. MD_LegalConstraints, MD_SecurityConstraints

Note: this is the same approach as used in DS-META-005 - Limitations on use.

odrl:hasPolicy

• The policy (usage rules) of the Dataset (using vocabulary model)

Need to check what is meant here – policy is the most generic approach

Standard encoding of the data

dct:conformsTo

https://www.w3.org/TR/vocab-dcat-3/#Property:resource_conforms_to

Start of the validity period for the dataset

MD_DataIdentification.extent.EX_Extent.temporalElement.EX_TemporalExtent.extent

Note: this is the same approach as used in DS-META-003 - Validity of the data set

dct:temporal.dct:startDate

https://www.w3.org/TR/vocab-dcat-3/#Property:dataset_temporal

• The temporal effective dates of the Datset

End of the validity period for the dataset. When absent, no end is specified.

MD_DataIdentification.extent.EX_Extent.temporalElement.EX_TemporalExtent.extent

Note: this is the same approach as used in DS-META-003 - Validity of the data set

dct:temporal.dct:endDate

https://www.w3.org/TR/vocab-dcat-3/#Property:dataset_temporal

Date at which the dataset became available.

MD_DataIdentification.citation.CI_Citation.date

Note: this is the same approach as used in DS-META-002 - Date and time when provided.

dct:issued

https://www.w3.org/TR/vocab-dcat-3/#Property:resource_release_date

id of the corresponding dataseries

dct:isPartOf

https://www.w3.org/TR/vocab-dcat-3/#Property:resource_qualified_relation

• Links (to and from) the Datasets Series

The locations defining the scope of the dataset

MD_DataIdentification.extent.EX_Extent.geographicalElement.EX_GeographicalExtent

Note: this is the same approach as used in DS-META-007 - Geographical extent of the data set

dct:spatial

https://www.w3.org/TR/vocab-dcat-3/#Property:dataset_spatial

• The spatial location of the Dataset Series (using vocabulary model)

location – look into vcard

Location should be based on AIRM/AIXM model

dcat:distribution

https://www.w3.org/TR/vocab-dcat-3/#Property:dataset_distribution

• Links to the availability of the dataset (as file and/or data service)

DatasetSeries

DatasetSeries

dcat:DatasetSeries

https://www.w3.org/TR/vocab-dcat-3/#dataset-series

(exact details under discussion)

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

@id

• The Identifier of the Dataset Series

Title of the dataset series

dct:title

• The Title of the Dataset Series

dct:description

• A Description of the Dataset Series

Enumeration indicating the main content of the dataset

Data subject as defined in ICAO PANS-AIM

dcat:theme

• The subject theme of the Dataset Series (using identified vocabulary terms)

Free text clarifying limitations with regard to the use of the datasets

MD_DataIdentification.resourceConstraints.MD_Constraints.useLimitations

Can also use e.g. MD_LegalConstraints, MD_SecurityConstraints

• The policy (usage rules) of the Dataset Series (using vocabulary model)

Standard encoding of the data

The locations defining the scope of the dataset series

dct:spatial

• The spatial location of the Dataset Series (using vocabulary model)

id of the corresponding data product specification

dct:isReferencedBy

• Links (to and from) the Data Product Specification that describes this series

dct:dataset

• Links (to and from) the individual Datasets that make up this series

DataProductSpecification

DataProductSpecification

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

@id

• The Identifier of the DPS

Title of the data product specification

dct:title

https://www.w3.org/TR/vocab-dcat-3/#Property:resource_title

• The Title of the DPS

dcat:distribution

• Links to the availability of the DPS (as a file)

dct:type

https://www.w3.org/TR/vocab-dcat-3/#Property:resource_type

• The type of document (using identified vocabulary terms)

dct:references

https://www.w3.org/TR/vocab-dcat-3/#Property:resource_relation

https://dublincore.org/specifications/dublin-core/dcmi-terms/#references

• Links (to and from) the Dataset Series that the DPS describes

Data File

File

dcat:Distribution

https://www.w3.org/TR/vocab-dcat-3/#Class:Distribution

Identification of the dataset file

The identification is unique within a service instance

dcat:accessURL

https://www.w3.org/TR/vocab-dcat-3/#Property:distribution_access_url

• The URL of the document/dataset

Name of the file

dct:title

https://www.w3.org/TR/vocab-dcat-3/#Property:distribution_title

Format of the file

dct:format

https://www.w3.org/TR/vocab-dcat-3/#Property:distribution_format

• The media type of document/dataset (using identified vocabulary terms)

Size of the file in Bytes.

dcat:byteSize

https://www.w3.org/TR/vocab-dcat-3/#Property:distribution_size

• The size (in bytes) of the document/dataset

{
  "@id": "http://donlon.aero/series/aerodrome/",
  "@type": "dcat:DatasetSeries",
  "dct:title": "Donlon Aerodrome Dataset Series",
  "dct:description": "Aerodrome datasets for Donlon ...",
  "dcat:theme": "http://vocab.icao.aero/feature/aerodrome",
  "dct:spatial": {
        "@type": "http://vocab.icao.aero/feature/aerodrome",
        "aixm:name": "Donlon International Airport",
        "aixm:designator": "DONDON",
           " aixm:designatorIATA": "ZZZZ" },
  "dct:dataset": ["http://donlon.aero/series/aerodrome/2021/Jan", 
                          "http://donlon.aero/series/aerodrome/2021/Feb",
                          "http://donlon.aero/series/aerodrome/2021/Mar"],
  "dct:isPartOf": "http://donlon.aero/data-catalogue",
  "dct:isReferencedBy": "http://donlon.aero/product/aerodrome"
}

{
  "@id": "http://donlon.aero/series/aerodrome/2021/Jan",
  "@type": "dcat:Dataset",
  "dct:title": "Donlon Aerodrome Dataset - January 2021",
  "dct:type": "http://vocab.icao.aero/info/baseline",
  "dcat:theme": "http://vocab.icao.aero/feature/aerodrome",
  "dct:accrualMethod": "http://vocab.icao.aero/info/airac",
  "dct:conformsTo": "http://vocab.icao.aero/info/aixm/511",
  "odrl:hasPolicy": { 
        "@type": "odrl:Prohibition",  
        "odrl:action": "http://vocab.icao.aero/policy/operational-use"  },
  "dct:issued": "2020-12-31",
  "dct:temporal": {
      "@type": "dct:PeriodOfTime", 
      "dct:startDate": "2021-01-01",
      "dct:endDate": "2021-01-30" },
  "dcat:distribution": {
      "@type": "dcat:Distribution", 
      "dcat:downloadURL": "http://donlon.aero/series/aerodrome/2021/Jan/data.xml",
      "dcat:mediaType": "https://www.iana.org/assignments/media-types/application/gml+xml",
      "dct:size": "34254" },
  "dcat:service": {
      "@type": "dcat:DataService",
      "dcat:endpointURL": "http://donlon.aero/api/aerodrome/",
      "dcat:compressFormat": "https://www.iana.org/assignments/media-types/application/gzip" },
  "dct:isPartOf": "http://donlon.aero/series/aerodrome/"
}