Name	Flags	Card.	Type	Description & Constraints
Extension		0 .. *	Extension	Offset and length of annotated text span
extension		1..*	Extension	Extension
extension:offset		1..1	Extension	Start index.
extension		0 .. 0
url		1 .. 1	uri	"offset"
value[x]		1..1	integer	Value of extension
extension:length		0..1	Extension	Span length.
extension		0 .. 0
url		1 .. 1	uri	"length"
value[x]		1..1	integer	Value of extension
extension:source		0..1	Extension	Source reference.
extension		0 .. 0
url		1 .. 1	uri	"source"
value[x]		1..1	Reference(DocumentReference)	Value of extension
url		1 .. 1	uri	"http://hl7.org/fhir/StructureDefinition/annotation-reference"
value[x]		0 .. 0
Documentation for this format