In the interest of good scientific practice there is a demand to make collected primary data publicly accessible, so that one sees not only the final, conclusive research results, but the entire research process can be followed as well. This is why the GESIS – Leibniz-Institute for Social Sciences (GESIS) and the ZBW – Leibniz Information Centre for Economics (ZBW) decided to implement the DOI registration portal for German social and economic data – da|ra. This infrastructure will lay the foundations for a permanent identification, localizing and ultimately a reliable citability of research data. A DOI is a name that permanently identifies an object (such as research data) in the digital environment. The DOI-name will not change, even though the information about the data, including where to find it, may change from time to time. In cooperation with DataCite, the international initiative to establish easier access to digital research data, GESIS is already operating the registration agency for social data da|ra. The service was initiated in 2010 with a pilot phase in order to set up the technical and organizational framework. Meanwhile more than 5000 studies are registered with DOI names. From 2011 onwards the registration service will be expanded to economic data. The paper will deal with the technical and organizational solutions of the DOI Name Registration Portal and focus on how new features are included in the already existing DOI service.