Rioxx (formerly RIOXX) is a metadata application profile which was originally developed to facilitate reporting to funders in the UK. Since then, over the last 7 years it has proved useful also to aggregator services harvesting metadata records from repositories, and feedback from those services has indicated a number of ways in which Rioxx could be improved. This presentation will explain how Rioxx has a new governance group which has been working since 2019 to prepare a new version, one which is designed to meet a broader range of use-cases. We will focus on the changes we have made, including: * far greater use of persistent identifiers (PIDs); * a greater focus on the Web as the overarching context (i.e. use of HTTP(S) URIs) * greater support for expressing important "events" in the lifecycle of scholarly publications, in a response to requirements from open-access funders We will also compare and contrast Rioxx with OpenAIRE. Finally, we explain the "radically open" approach we have taken to development, involving community feedback at each stage. Rioxx is no longer a UK-specific profile, and we believe that Rioxx v3 has potential value for repositories in the global context.