description: The amount of time the individual was exposed to the Substance.
package_name: hl7.fhir.core
derivation: constraint
name: Amount of time individual was exposed to Substance
type: null
elements:
  extension: {name: extension, index: 0}
  url:
    type: uri
    pattern: {type: Uri, value: 'http://hl7.org/fhir/StructureDefinition/openEHR-exposureDuration'}
    index: 1
  value:
    choices: [valueQuantity]
    index: 3
  valueQuantity: {type: Quantity, choiceOf: value, index: 4}
package_version: 1.4.0
extensions: {}
class: datatype
kind: datatype
url: http://hl7.org/fhir/StructureDefinition/openEHR-exposureDuration
base: http://hl7.org/fhir/StructureDefinition/Extension
version: null
required: [value, valueQuantity]