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=Messaging Platform= For questions, feedback, and open issues being addressed for this specification, visit the Implementer Questions and Feedback Page

Please visit the Nationwide Health Information Network Inventory page on the ONC website in order to access the latest version of this specification.

Specification Definition
Describes the common web service protocols that must underlie every message transmitted between NHIOs. These specifications represent a common messaging and security platform for all other Nationwide Health Information Network services. The Messaging Platform describes the transport rather than the interface specifications as Messaging Platform consists of the underlying common elements of message transport rather than individual programming interfaces that can be invoked as web services. Along with the Authorization framework, this specification forms the Nationwide Health Information Network’s messaging, security, and privacy foundation.

Transaction Standard
The Nationwide Health Information Network Messaging Platform is based on the use of web services, as articulated within interoperability profiles established by the Web Services Interoperability Organization (WS-I). Collectively, the WS-I Basic and Basic Security Profiles define a common platform for secure and reliable exchange of messages between NHIOs in a manner that is independent of specific operating system or programming language frameworks.