NHS Digital FHIR Implementation Guide (Retired

Conformance url
https://fhir.nhs.uk/StructureDefinition/Extension-Spine-ActorRoleServiceOrSpecialty

Extension		Extension	There are no (further) constraints on this element Element id Extension Short description Role of an actor Definition The preferred use of this is to record Clinical Specialty (or Hospital Service). It may also be used to record the SDS Role (for Practitioner and PractitionerRole references) or SNOMED Service code (for Organization references). Data type Extension
url		Fixed Value	There are no (further) constraints on this element Element id Extension.url Fixed value https://fhir.nhs.uk/StructureDefinition/Extension-Spine-ActorRoleServiceOrSpecialty
value[x]	1..	Binding	There are no (further) constraints on this element Element id Extension.value[x] Binding NHSDataDictionaryMainClinicalSpecialty (preferred)
valueCodeableConcept		CodeableConcept	There are no (further) constraints on this element Data type CodeableConcept

NHS Digital FHIR Implementation Guide (Retired - 2.1.50)