Thank you for raising this issue. I'm afraid I would disagree with you slightly in that I think the description that is currently in place is somewhat less than clear, as it allows for the placement of either a repository (an entity that holds or archives an object) or a publisher (an entity that publishes, prints, distributes, releases, issues, or produces an object). The reason for this ambiguity is that the DataCite Metadata Schema is intended to serve a very broad spectrum of researchers working with all kinds of research objects.
I am very familiar, however, with the particular challenge you are describing in connection with the interoperability with the Data Citation Index. Equally, inasmuch as DataCite is an endorser of the Jt Data Citation Principles (
https://www.force11.org/datacitation) and they show repository as part of the citation rather than publisher, perhaps it is time for us to take another look at our recommendation.
In any case, you've given us a lot to think about, and I will add this suggestion to our list for discussion.
Regards,
Joan Starr
Chair, Metadata Working Group