In DataCite/Datacite export, when the user enters a Keyword Term URI, include Keyword Term URI in the `valueURI` property of the `subject` property

[jggautier]

Overview of the Feature Request

When the user enters a Keyword Term URI, the DataCite/Datacite export should include the Keyword Term URI in the valueURI property of the subject property, as the OpenAIRE/oai_datacite export already does. Currently, the DataCite/Datacite export excludes the Keyword Term URI from the valueURI property.

This issue is part of a larger effort to align both metadata exports, described in #11916 and #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 #11916 and #12281.

What existing behavior do you want changed?

Currently, the DataCite/Datacite export doesn't include a valueURI property with the Keyword Term URI. For example:

<subject
    schemeURI="https://controlledvocabularyurl1.org"
    subjectScheme="Keyword Vocab Name 1">Keyword Term 1
</subject>

<subject>Keyword Term 2</subject>

The OpenAIRE/oai_datacite export includes the Keyword Term URI in the valueURI property. For example:

<subject
    schemeURI="https://controlledvocabularyurl1.org"
    valueURI="https://keywordtermuri1.org"
    subjectScheme="Keyword Vocab Name 1">Keyword Term 1
</subject>

<subject
    valueURI="https://keywordtermuri2.org">Keyword Term 2
</subject>

The DataCite/Datacite export should be changed to include the Keyword Term URI in the valueURI property in the same way that the OpenAIRE/oai_datacite export does.

Any open or closed issues related to this feature request?

• Suggestion: Investigate ways to resolve confusion about and reduce the maintenance burden of the "Datacite" and "OpenAIRE" metadata exports #11916
• Feature Request: Align the DataCite/Datacite and OpenAIRE/oai_datacite exports that ship with Dataverse #12281
• DataCite Xml updates- 4.7, language, Translator, Keyword URI, etc. #12346