The MiniApps Working Group has just published a Draft Note of MiniApp Addressing. This specification defines how MiniApps are located, which is called MiniApp Addressing, including the specifications for specific MiniApp URI syntax components based on the URI specification, and the process to dereference the MiniApp URI. Implementing this specification enables the user agent to locate the resources of MiniApp.
The Working Group is publishing this specification as a Draft Note to encourage early review. Comments are welcome via the GitHub repository.