description: This Extension contains the location of the observed phenomenon or entity that is the subject of the observation.
package_name: hl7.fhir.us.mdi
derivation: constraint
name: ExtensionLocation
type: Extension
elements:
  url:
    pattern: {type: Uri, value: 'http://hl7.org/fhir/us/mdi/StructureDefinition/Extension-observation-location'}
    mustSupport: true
    index: 0
  value:
    mustSupport: true
    choices: [valueReference]
    index: 2
  valueReference:
    refers: ['http://hl7.org/fhir/us/core/StructureDefinition/us-core-location']
    type: Reference
    mustSupport: true
    choiceOf: value
    index: 3
package_version: 1.0.0-ballot
class: extension
kind: complex-type
url: http://hl7.org/fhir/us/mdi/StructureDefinition/Extension-observation-location
base: http://hl7.org/fhir/StructureDefinition/Extension
version: 1.0.0-ballot
required: [valueReference, value]