This scoping report concentrates on the metadata required by the key stakeholders in the scholarly communications supply chain in order to define a best practice for all stakeholders as regards the metadata types and formats that are required to allow open access publishers to meaningfully interact with it.

OPERAS as an infrastructure supporting open scholarly communication will provide a catalogue of services to the academic community. Despite their diversity, the services should follow common rules and principles to establish a common framework where they can be included and managed. The principles concern governance, sustainability and insurance. It entails to set up contractual relationships...