Thierry Bouche and Jiri Rákosnik have self-archived "Report on the EuDML External Cooperation Model" in arXiv.org.
Here's an excerpt:
The EuDML project was explicitly envisioned as a pilot project addressing two intimately intertwined challenges: (i) setting up the technical infrastructure to create a unified access point for the digital mathematical content hosted by different organizations across various countries; (ii) defining a cooperation model with a variety of stakeholders that would allow building a reliable and durable global reference library, aiming to be eventually exhaustive. On both sides the project reached clear successes and modified the state-of-the-art. In this paper we report on the latter one.