There is a great deal of information about DA-RT activities, history, and relevant policy documents on the official website.
Data Access and Transparency in Other Disciplines, by Anna Calasanti.
“Transparency in Qualitative and Multi-Method Research: A Symposium.” Spring 2015 issue of the newsletter of the QMMR section of APSA, edited by Tim Buthe and Alan Jacobs.
Andrew Moravcsik on “Active Citation: A Precondition for Replicable Qualitative Research” in PS, January 2010.
Arthur Lupia and Colin Elman on “Openness in Political Science: Data Access and Research Transparency” in PS, January 2014. See the rest of the symposium here.