description: Record of the date and/or time of the first exposure to the Substance for this Reaction Event.
package_name: hl7.fhir.r2.examples
name: Date(/time) of first exposure to Substance
type: null
elements:
  extension: {name: extension, index: 0}
  url:
    type: uri
    pattern: {type: Uri, value: 'http://hl7.org/fhir/StructureDefinition/openEHR-exposureDate'}
    index: 1
  value:
    choices: [valueDateTime]
    index: 3
  valueDateTime: {type: dateTime, choiceOf: value, index: 4}
package_version: 1.0.2
extensions: {}
class: datatype
kind: datatype
url: http://hl7.org/fhir/StructureDefinition/openEHR-exposureDate
version: null
required: [valueDateTime, value]