An occurrence of information being transmitted. E.g., an alert that was sent to a responsible provider, a public health agency was notified about a reportable condition.

Identifiers associated with this Communication that are defined by business processes and/ or used to refer to it when a direct URL reference to the resource itself is not appropriate (e.g. in CDA documents, or in written / printed documentation).

The type of message conveyed such as alert, notification, reminder, instruction, etc.

The entity (e.g., person, organization, clinical information system, or device) which was the source of the communication.

The entity (e.g., person, organization, clinical information system, or device) which was the target of the communication.

Text, attachment(s), or resource(s) that was communicated to the recipient.

An individual message part for multi-part messages.

The communication medium, e.g., email, fax.

The status of the transmission.

The encounter within which the communication was sent.

The time when this communication was sent.

The time when this communication arrived at the destination.

The reason or justification for the communication.

The patient who was the focus of this communication.