The NwHIN Administrative Distribution Web Service is intended to provide a mechanism for NHIOs to exchange non-patient specific data using a "push" mechanism. The Administrative Distribution transaction is a one way transaction, meaning there is no application-level response.
The AD message, also called the Send Alert Message Request, is a collection of metadata and documents or structured XML data transferred between a Message Sender and a Message Receiver.
As part of the payload, the Send Alert Message Request supports the ability to include multiple documents in a single request.
The specification allows for the same alert to be sent to multiple agencies via Exchange Targeting.