description: This extension is used to indicate the principal physical location where an observation event occurred.
package_name: hl7.fhir.us.pacio
derivation: constraint
name: ObservationEventLocation
type: Extension
elements:
  value:
    choices: [valueReference]
    index: 1
  valueReference:
    type: Reference
    choiceOf: value
    refers: ['http://hl7.org/fhir/us/core/StructureDefinition/us-core-location']
    index: 2
package_version: pfe-1.0.0
class: extension
kind: complex-type
url: http://hl7.org/fhir/us/pacio-pfe/StructureDefinition/event-location
base: http://hl7.org/fhir/StructureDefinition/event-location
version: 1.0.0