Currently, users refer to data sets in publications using DOIs if available, and else provide information about producer, year, report number etc. either in the article text or in the References section. A majority of RIs feel it is absolutely necessary to allow unambiguous references to be made to subsets of datasetsdata sets, preferably in the citation, while few find the ability to create and later cite collections of individual datasets data sets is important. Ensuring that credit for producing (and to a lesser extent curating) scientific data sets is “properly assigned” is a common theme for all RIs - not the least because funding agencies and other stakeholders require such performance indicators, but also because individual PIs want and need recognition of their work. Connected to this, most RIs have strategies for collecting usage statistics for their data products, i.e. through bibliometric searches (quasi-automated or manual) of from scientific literature, but thus often rely on publishers indexing also data object DOIs.