Name	Flags	Card.	Type	Description & Constraints
Communication	TU		DomainResource	A record of information transmitted from a sender to a receiver Elements defined in Ancestors: id, meta, implicitRules, language, text, contained, extension, modifierExtension
identifier	Σ	0..*	Identifier	Unique identifier
instantiatesCanonical	Σ	0..*	canonical( PlanDefinition | ActivityDefinition | Measure | OperationDefinition | Questionnaire)	Instantiates FHIR protocol or definition
instantiatesUri	Σ	0..*	uri	Instantiates external protocol or definition
basedOn	Σ	0..*	Reference( Any)	Request fulfilled by this communication
partOf	Σ	0..*	Reference( Any)	Part of this action
inResponseTo		0..*	Reference( Communication)	Reply to
status	?! Σ	1..1	code	preparation | in-progress | not-done | on-hold | stopped | completed | entered-in-error | unknown EventStatus ( Required)
statusReason	Σ	0..1	CodeableConcept	Reason for current status CommunicationNotDoneReason ( Example)
category		0..*	CodeableConcept	Message category CommunicationCategory ( Example)
priority	Σ	0..1	code	routine | urgent | asap | stat RequestPriority ( Required)
medium		0..*	CodeableConcept	A channel of communication ParticipationMode ( Example)
subject	Σ	0..1	Reference( Patient | Group)	Focus of message
topic		0..1	CodeableConcept	Description of the purpose/content CommunicationTopic ( Example)
about		0..*	Reference( Any)	Resources that pertain to this communication
encounter	Σ	0..1	Reference( Encounter)	Encounter created as part of
sent		0..1	dateTime	When sent
received		0..1	dateTime	When received
recipient		0..*	Reference( Device | Organization | Patient | Practitioner | PractitionerRole | RelatedPerson | Group | CareTeam | HealthcareService)	Message recipient
sender		0..1	Reference( Device | Organization | Patient | Practitioner | PractitionerRole | RelatedPerson | HealthcareService)	Message sender
reasonCode	Σ	0..*	CodeableConcept	Indication for message SNOMED CT Clinical Findings ( Example)
reasonReference	Σ	0..*	Reference( Condition | Observation | DiagnosticReport | DocumentReference)	Why was communication done?
payload		0..*	BackboneElement	Message payload
content[x]		1..1		Message part content
contentString			string
contentAttachment			Attachment
contentReference			Reference( Any)
note		0..*	Annotation	Comments made about the communication
Documentation for this format