Heinz Pampel et al. have self-archived "Making Research Data Repositories Visible: The re3data.org Registry" in PeerJ PrePrints.
Here's an excerpt:
Researchers require infrastructures that ensure a maximum of accessibility, stability and reliability to facilitate working with and sharing of research data. Such infrastructures are being increasingly summarized under the term Research Data Repositories (RDR). The project re3data.org—Registry of Research Rata Repositories has begun to index research data repositories in 2012 and offers researchers, funding organizations, libraries and publishers an overview of the heterogeneous research data repository landscape. Information icons help researchers to easily identify an adequate repository for the storage and reuse of their data. This article describes the RDR landscape, outlines the practicality of re3data.org as a service, and shows how this service helps to find research data.