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 such as alert, notification, reminder, instruction, etc.

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

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

Text, attachment(s), or resource(s) to be 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 is the focus of this communication.