Requisition Signature Extension

Canonical	../StructureDefinition/nexus-requisition-signature
Status	draft · 1.26.0
Base	Extension (constraint)
Context	ServiceRequest (element)
Source	FSH · JSON

The clinician's electronic signature on a laboratory requisition: who signed it, and when.

Elements / Differential

What this profile constrains beyond Extension. Anything not listed is unchanged from the base; muted type/cardinality values are the base's, shown for context.

Element	Flags	Card.	Type	Description & Constraints
Extension				The clinician's electronic signature on the requisition -- who, and when
extension		2..*	Extension	i
extension:signer	S	1..1	Extension	Who signed -- the ordering clinician, as a PractitionerRole where one resolved i
extension		0..0	Extension	i
url		1..1	http://hl7.org/fhirpath/System.String	i Fixed: signer
value[x]		0..1	Reference(Practitioner | PractitionerRole)
extension:signedAt	S	1..1	Extension	When the requisition was signed -- a fully-qualified instant i
extension		0..0	Extension	i
url		1..1	http://hl7.org/fhirpath/System.String	i Fixed: signedAt
value[x]		0..1	dateTime
extension:stamp		0..1	Extension	LEGACY, read-only: identifier of a stored signature-stamp document i
extension		0..0	Extension	i
url		1..1	http://hl7.org/fhirpath/System.String	i Fixed: stamp
value[x]		0..1	string
url		1..1	http://hl7.org/fhirpath/System.String	i Fixed: ../StructureDefinition/nexus-requisition-signature
value[x]		0..0	base64Binary, boolean, canonical, code, date, dateTime, decimal, id, instant, integer, markdown, oid, positiveInt, string, time, unsignedInt, uri, url, uuid, Address, Age, Annotation, Attachment, CodeableConcept, Coding, ContactPoint, Count, Distance, Duration, HumanName, Identifier, Money, Period, Quantity, Range, Ratio, Reference, SampledData, Signature, Timing, ContactDetail, Contributor, DataRequirement, Expression, ParameterDefinition, RelatedArtifact, TriggerDefinition, UsageContext, Dosage, Meta