TG Download - dataset identifier namespace is optional

[heidivanparys]

Change proposal description

The namespace component of the dataset identifier is optional, the requirements in the TG Download should reflect this.

Addressed TG

Technical Guidance for the implementation of INSPIRE Download Services

Location

Make spatial_dataset_identifier_namespace optional in requirements 13, 42, 43, 44, 50 and 51.

Issue faced

The namespace component of the dataset identifier is optional, in fact it is actually recommended to have a dataset identifier that is encoded in one string, containing both namespace and code, see https://inspire-mif.github.io/technical-guidelines/metadata/metadata-iso19139/metadata-iso19139.html#_unique_resource_identifier. The requirements in the TG Download do not reflect this.

Proposed solution

Update of the TG requirements 13, 42, 43, 44, 50 and 51 and the surrounding text, see pull request.

Pull request

#83

Additional information

Relevant legislation

https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:02008R1205-20081224

Impact on IR

N/A

Impact on INSPIRE validator

Impact on:

• http://inspire.ec.europa.eu/id/ats/download-atom/3.1/atom-pre-defined/download-service-feed-dataset-identifiers (req 13)
• https://github.com/inspire-eu-validation/download-atom/blob/3.1/atom-pre-defined/opensearch-description-url-describe-spatial-dataset-operation.md (req 42)
• https://github.com/inspire-eu-validation/download-atom/blob/3.1/atom-pre-defined/opensearch-description-one-url-get-spatial-dataset-operation.md (req 43)
• https://github.com/inspire-eu-validation/download-atom/blob/3.1/atom-pre-defined/opensearch-description-query-examples-for-each-dataset.md (req 44)
• http://inspire.ec.europa.eu/id/ats/download-wfs/3.1/wfs-pre-defined/predefined-stored-query (req 50, 51)

Linked issue

INSPIRE-MIF/helpdesk-validator#124
inspire-eu-validation/download-service#89

Impact on INSPIRE XML schemas

N/A

Impact on INSPIRE code lists

N/A

Change proposer

Heidi Vanparys, Danish Agency for Data Supply and Infrastructure

References

N/A

[heidivanparys]

To ease the discussion, some examples below.

DK INSPIRE Administrative units has the following spatial data set identifier:

This is in accordance with the recommendation to have a dataset identifier that is encoded in one string, containing both namespace and code, see https://github.com/INSPIRE-MIF/technical-guidelines/blob/2022.2/metadata/metadata-iso19139/metadata-iso19139.adoc#3121-unique-resource-identifier.

In the Atom feed, the spatial data set identifier is currently indicated as follows:

So the spatial_dataset_identifier_namespace element is not present here.

However, this conflicts with the requirement in section Download Service Feed: feed 'entry' element:

In comparison, INSPIRE - Unités Administratives - UrbIS has the following spatial data set identifier:

This spatial data set identifier is also compliant to the INSPIRE specifications, it's just another way of encoding it.

In the Atom feed, the spatial data set identifier is currently indicated as follows:

[fabiovinci]

Sub-group meeting on 17.04.2023:
the issue was discussed in the sub-group and it was decided to postpone it to better verify if there are implications in other requirements of the same TG and/or in other TGs.

[fabiovinci]

According to this change proposal, Requirement 44 should also be reformulated.

[fabiovinci]

The change should also involve Requirement 43 since the Validator checks the mandatory presence of the "spatial_dataset_identifier_namespace" element in the Get Spatial Data Set template.

[heidivanparys]

This also affects requirement 42. I've updated the change proposal and the pull request.

[fabiovinci]

Sub-group meeting on 10.11.2023:
the Sub-group approved this change proposal.

[sMorrone]

During the joint MIG/MIG-T meeting held on 30/11/2023, the proposal was endorsed.
More details in the minutes of the 76th MIG-T meeting

[fabiovinci]

It seems that this issue also has an impact on schemas.
In particular, the schema https://inspire.ec.europa.eu/schemas/inspire_dls/1.0/inspire_dls.xsd defines elements to be used in an ATOM feed and the attribute spatial_dataset_identifier_namespace is mandatory.

Even if the schema is not used for ATOM validation, it is worth modifying it by setting the attribute spatial_dataset_identifier_namespace as optional.

On the contrary, the type inspire_common:uniqueResourceIdentifier defined by the https://inspire.ec.europa.eu/schemas/common/1.0/common.xsd schema and used for the SpatialDataSetIdentifier attribute of the WMS/WFS Extended capabilities is already correctly defined, i.e. the attribute inspire_common:Namespace is optional.