Using FHIR to wrap EMPI

Does anyone have some examples or white papers they can share about how they’ve used FHIR to wrap a proprietary or off the shelf EMPI with patients that belong to multiple domains and organizations. Also, if possible, how oath is used to manage access to patient IDentifier in these various organizations.

Apparently no one here has done that. There’s some work from commonwell along these lines, and they published a specification -

Thank you Grahame. Will look into it.