Feature Request/Idea: Include Grant ID in "Schema.org JSON-LD" metadata export format

[kbrueckmann]

Overview of the Feature Request
The proposal of this feature is to include the grant number in the metadata export format "Schema.org JSON-LD". So far only the funding agency is included in this format (as funder), whereas in others like OpenAIRE the grant number is also given (see Dataverse metadata crosswalk). The idea was shortly mentioned in the Dataverse chat to @pdurbin.
As far as I can see the Schema.org property funding might be quite well-suited for this.

What kind of user is the feature intended for?
API User

What inspired the request?
A comparison of information given via the metadata input fields with the amount of information received from the metadata export formats.

What existing behavior do you want changed?
Expanding the Schema.org JSON-LD metadata export format.

Any open or closed issues related to this feature request?
None found with a search. #4859 might be broadly related.

[jggautier]

Thanks @kbrueckmann! It's great that you've brought this up, since we're doing research (#4859 and #10196) that will likely lead to changes in how Dataverse organizes funding metadata, which will affect how fields are mapped to Schema.org properties and other metadata exports.

Right now I'd recommend planning to change the Schema.org export to include grant numbers based on how Dataverse currently organizes funding metadata. Then we can revisit the mappings when we know more about how we'll re-organize Dataverse's funding metadata fields.

It was mostly Google's recommendations that influenced how Dataverse exports metadata using Schema.org. We talked a lot about those recommendations in #2243. Google's recommendations still doesn't mention how to include grant numbers. So back in 2020, I wrote that there wasn't a way to include things like grant numbers.

But the following year when we were improving the Schema.org export, we mentioned guidelines from others that included ways to add things like grant numbers, namely guidelines from "Science on Schema.org": https://github.com/ESIPFed/science-on-schema.org/blob/master/guides/Dataset.md#funding.

I think it'll be important to consider how Google's validation tools will respond to changes in the Schema.org export that include grant numbers. Several Dataverse repositories keep an eye on the Google Search Console's reports on the validity of the Schema.org in their dataset pages. Will the Google Search Console start complaining if funding information is included the way that OpenAIRE does it or how it's recommended from the guidelines from "Science on Schema.org" guidelines? I think this could be tested using Google's validation tools.