DataStaR, a Data Staging Repository (http://datastar.mannlib.cornell.edu/) hosted by Cornell University?s Albert R. Mann Library, was conceived of as a platform and a set of services to facilitate data sharing among collaborators, and to enable faculty to publish digital data and high quality metadata to domain-specific repositories and institutional repositories. DataStaR is intended to serve as a temporary repository for data sets (in any stage of completion) that researchers may share with selected colleagues, as well as a platform with tools for creating metadata in variety of formats, supported by librarian-curators prepared to assist researchers in preparing and submitting both data and metadata for publication to an external repository for the long term.