description: A reference to an ActivityDefinition that describes the type of activity or service associated with an Appointment.   \nThis extension allows linking an Appointment to a formal definition of the activity being performed, enabling structured representation of the intended service or procedure.
package_name: servicewell.fhir.wof-portal
derivation: constraint
name: ActivityDefinitionReference
type: Extension
elements:
  extension: {index: 0}
  url:
    pattern: {type: Uri, value: 'https://canonical.fhir.link/servicewell/wof-portal/StructureDefinition/activity-definition-reference'}
    index: 1
  value:
    short: Reference to an ActivityDefinition
    choices: [valueReference]
    index: 3
  valueReference:
    type: Reference
    short: Reference to an ActivityDefinition
    choiceOf: value
    refers: ['https://canonical.fhir.link/servicewell/wof-portal/StructureDefinition/activity-definition-portal']
    index: 4
package_version: 1.0.0
extensions: {}
class: extension
kind: complex-type
url: https://canonical.fhir.link/servicewell/wof-portal/StructureDefinition/activity-definition-reference
base: http://hl7.org/fhir/StructureDefinition/Extension
version: 1.0.0
required: [valueReference, value]