description: An extension to capture the referred-to condition resource for the underlying condition to COVID-19
package_name: hl7.fhir.us.covid19library
derivation: constraint
name: COVID19UnderlyingConditionReference
type: Extension
elements:
  extension: {index: 0}
  url:
    pattern: {type: Uri, value: 'http://hl7.org/fhir/us/covid19library/StructureDefinition/covid19-underlying-condition-reference'}
    index: 1
  value:
    choices: [valueReference]
    index: 3
  valueReference: {type: Reference, choiceOf: value, index: 4}
package_version: 0.14.0
extensions: {}
class: extension
kind: complex-type
url: http://hl7.org/fhir/us/covid19library/StructureDefinition/covid19-underlying-condition-reference
base: http://hl7.org/fhir/StructureDefinition/Extension
version: 0.14.0