Where should I include funder information in the DOI metadata?

If the resource being published received grant funding from a funder e.g FP7, this information can be included in the DOI metadata in the fundingReferences section.

Example:

<fundingReferences>
<fundingReference>
<funderName>Seventh FrameworkProgramme</funderName><funderIdentifier funderIdentifierType="Crossref FunderID" schemeURI=<http://doi.org/">http://dx.doi.org/10.13039/100011102</funderIdentifier>
<awardNumber awardURI="<http://cordis.europa.eu/project/rcn/100180_en.html"282625/
awardNumber>
<awardTitle>MOTivational strength ofecosystem services and alternativeways to express the value ofBIOdiversity</awardTitle>
</fundingReference>
</fundingReferences>

In this case the funderIdentifier DOI is the Crossref Funder ID. Some funders may have multiple identifiers. The DOI is for FP7, and there is a different DOI for H2020, and there will be for Horizon
Europe.

You can look them up here.