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IS-04: NMOS Discovery and Registration
AMWA IS-04 specifies APIs to allow network-connected devices to register their resources on a shared registry, and for client applications to query the registry, and to subscribe to updates. It also describes a method for peer-to-peer discovery in order to permit operation on a link-local only or smaller network deployment. IS-04 provides definitions for basic resources -- Devices, Senders, Receivers, Sources, Flows -- that underpin other AMWA NMOS specifications.
For further information see the AMWA NMOS Technical Overview and also the JT-NM Reference Architecture
Project Scope (pdf) 
AMWA IS-04 NMOS Discovery and Registration Specification v1.2.1 
: Release Documentation
- v1.2 added support for connection management using AMWA IS-05.
AMWA IS-04 NMOS Discovery and Registration Specification v1.1.2 : Release Documentation
- v1.1 allowed use of encryption in APIs, added advanced queries, and allowed use in ST 2022-6 environments.
AMWA IS-04 NMOS Discovery and Registration Specification v1.0.3 : Release Documentation
- v1.0 provided core functionality for registered and peer-to-peer operation in "mono-essence" environments, such as ST 2110