In DataCite/Datacite export, when the user adds a DAI author identifier, include in creator nameIdentifier property

Overview of the Feature Request

When the user adds a DAI author identifier type, the DataCite/Datacite export should include the DAI author identifier in the creator nameIdentifier property, like the OpenAIRE/oai_datacite export does. Currently, the DataCite/Datacite export omits the DAI identifier entirely.

This issue is part of a larger effort to align both metadata exports, described in https://github.com/IQSS/dataverse/issues/11916 and https://github.com/IQSS/dataverse/issues/12281.

What kind of user is the feature intended for?

API User, Superuser, and Sysadmin

What inspired the request?

This is part of a larger effort to align the OpenAIRE/oai_datacite and DataCite/Datacite metadata exports. There is more context at https://github.com/IQSS/dataverse/issues/11916 and https://github.com/IQSS/dataverse/issues/12281.

What existing behavior do you want changed?

Currently, when the user adds a DAI author identifier type and a DAI identifier, the DataCite/Datacite export does not include the identifier in the nameIdentifier property.

The OpenAIRE/oai_datacite export does include it. For example:

<nameIdentifier
    nameIdentifierScheme="DAI">info:eu-repo/dai/nl/072728442
</nameIdentifier>

The DataCite/Datacite export should be changed to include the DAI identifier in the nameIdentifier property in the same way that the OpenAIRE/oai_datacite export does.

Any open or closed issues related to this feature request?

• https://github.com/IQSS/dataverse/issues/11916
• https://github.com/IQSS/dataverse/issues/12281

Start at the DataCite/Datacite metadata export and compare its creator handling with the OpenAIRE/oai_datacite export, using issues #11916 and #12281 for alignment context. Verify the export for a creator with a DAI identifier and consider the change complete when it emits a creator nameIdentifier with nameIdentifierScheme="DAI" and the identifier value.