A lightning talk at Samvera Virtual Connect 2019 described thus and For metadata specialists, creating metadata profiles, system requirements, and accompanying documentation often feels like a game of whack-a-mole. Current practices and technologies also mean comparing your profiles with another institutions’ is an enormous hassle. To address this problem, developers and metadatists came together to create the machine-readable metadata modeling (M3) specification. This presentation will offer some history and use cases for the specification, an update on its current status, and where to learn more.