DocumentReference 
meta 
implicitRules language Binding: ?? (preferred): A human language.
text This profile does not constrain the narrative in regard to content, language, or traceability to data elements
contained 
extension 
modifierExtension masterIdentifier identifier status Binding: ?? (required): The status of the document reference.
docStatus Binding: ?? (required): Status of the underlying document.
type Binding: ?? (preferred): Precise type of clinical document.
extension Slice: Unordered, Open by value:url
coding Slice: Unordered, Closed by value:$this
text category Binding: ?? (example): High-level kind of a clinical document at a macro level.
subject date author authenticator custodian relatesTo extension modifierExtension code Binding: ?? (required): The type of relationship between documents.
target description securityLabel Binding: ?? (extensible): Security Labels from the Healthcare Privacy and Security Classification System.
content extension modifierExtension attachment format Binding: ?? (preferred): Document Format Codes.
context 
extension modifierExtension encounter event Binding: ?? (example): This list of codes represents the main clinical acts being documented.
period facilityType Binding: ?? (example): XDS Facility Type.
practiceSetting Binding: ?? (example): Additional details about where the content was created (e.g. clinical specialty).
sourcePatientInfo related Documentation for this format