Couperin (United consortium of higher education and research establishments for access to digital publications) is a consortium serving as a negociation network and an expert in electronic library resources of higher education and research in France.

The CCSD takes part in the Open Science work group (GTSO), as a member of the “Open Archives” subgroup (GTAO): the group works on technical specifications and recommandations for the proper functioning of an open archive. It also works on open archive metrics, in collaboration with the team ezPARSE/ezMESURE, in order to harmonise and offer means of comparison.