2552 20160701171707.0 10.1007/10857598_55 DOI ASTROimport-709 de Cuyper, J.-P. 2004 The UDAPAC Project -- Uccle Direct Astronomical Plate Archive Centre: A New International Facility for Inherited Observations We discuss a project to create a centralized astronomical direct-plate archive and digitizing facility, with a view to making photographic data fully available for scientific research. Griffin, E. Hudec, R. Toward an International Virtual Observatory 2004 289 http://esoads.eso.org/abs/2004tivo.conf..289D published in NONREF