In the past few years, open access repositories and their associated services have become an important component of the global eresearch infrastructure. Increasingly, repositories are also being integrated with other systems, such as research administrative systems and with research data repositories, with the aim of providing a more integrated and seamless suite of services to various communities. Repositories can also be connected into networks (e.g. at the national or regional level) to support unified access to an open, aggregated collection of scholarship and related materials that machines can mine enabling researchers to work with content in new ways and allowing funders and institutions to track research outputs.

Scholarly communication is undergoing fundamental changes, in particular with new requirements for open access to research outputs, new forms of peer - review, and alternative methods for measuring impact. In parallel, technical developments, especially in communication and interface technologies facilitate bi-directional data exchange across related applications and systems.

The aim of this roadmap is to identify important trends and their associated action points in order for the repository community to determine priorities for further investments in interoperability. The roadmap process began with the compilation of a comprehensive list of interoperability issues derived from a broad discussion in the information, publishing and repository community. An Expert Advisory Panel was then asked to rate each issue according to its level of complexity and temporal relevance (or timing). This report presents the results of this process, ranking the issues according to these dimensions.