Information Assets with Identifiers in Public Namespaces. [RFC4452] (section 3) defines an "info" registry of public namespaces, which is maintained by NISO and can be accessed from [http://info-uri.info/].
Windows Autopilot Modern Device Management status updates
Access to data available from mail servers
Matter protocol on-boarding payloads that are encoded for use in QR Codes and/or NFC Tags
Real-Time Streaming Protocol (RTSP) over TLS
Real-Time Streaming Protocol (RTSP) over unreliable datagram transport
Extensible Messaging and Presence Protocol

[OpenID_Foundation_Artifact_Binding_Working_Group][OpenID Connect Core 1.0, Section 7.3]