A request to convey information from a sender to a recipient. A request to convey information from a sender to a recipient. If the element is present, it must have either a @value, an @id, or extensions Business identifiers assigned to this communication request by the performer or other systems which remain constant as the resource is updated and propagates from server to server. A plan or proposal that is fulfilled in whole or in part by this request. Completed or terminated request(s) whose function is taken by this new request. A shared identifier common to multiple independent Request instances that were activated/authorized more or less simultaneously by a single author. The presence of the same identifier on each request ties those requests together and may have business ramifications in terms of reporting of results, billing, etc. E.g. a requisition number shared by a set of lab tests ordered together, or a prescription number shared by all meds ordered at one time. The status of the proposal or order. Captures the reason for the current state of the CommunicationRequest. Indicates the level of authority/intentionality associated with the CommunicationRequest and where the request fits into the workflow chain. The type of message to be sent such as alert, notification, reminder, instruction, etc. Characterizes how quickly the proposed act must be initiated. Includes concepts such as stat, urgent, routine. If true indicates that the CommunicationRequest is asking for the specified action to *not* occur. A channel that was used for this communication (e.g. email, fax). The patient or group that is the focus of this communication request. Other resources that pertain to this communication request and to which this communication request should be associated. The Encounter during which this CommunicationRequest was created or to which the creation of this record is tightly associated. Text, attachment(s), or resource(s) to be communicated to the recipient. The time when this communication is to occur. For draft requests, indicates the date of initial creation. For requests with other statuses, indicates the date of activation. The device, individual, or organization who asks for the information to be shared. The entity (e.g. person, organization, clinical information system, device, group, or care team) which is the intended target of the communication. The entity (e.g. person, organization, clinical information system, or device) which is to be the source of the communication. Describes why the request is being made in coded or textual form. Comments made about the request by the requester, sender, recipient, subject or other participants. A request to convey information from a sender to a recipient. The content (or for multi-part communications, one portion of the communication) to be communicated.