description: This cross-version extension represents MedicationDispense.dosageInstruction.asNeeded[x] from http://hl7.org/fhir/StructureDefinition/MedicationDispense|1.0.2 for use in FHIR R4.
package_name: hl7.fhir.uv.xver-r2.r4
derivation: constraint
name: ext_R2_MedicationDispense_do_asNeeded
type: Extension
elements:
  value:
    base: {path: 'Extension.value[x]'}
    short: Take "as needed" f(or x)
    choices: [valueBoolean, valueCodeableConcept]
    index: 1
  valueBoolean:
    base: {path: 'Extension.value[x]'}
    type: boolean
    short: Take "as needed" f(or x)
    choiceOf: value
    index: 2
  valueCodeableConcept:
    base: {path: 'Extension.value[x]'}
    type: CodeableConcept
    short: Take "as needed" f(or x)
    choiceOf: value
    index: 3
  url:
    pattern: {type: uri, value: 'http://hl7.org/fhir/1.0/StructureDefinition/extension-MedicationDispense.dosageInstruction.asNeeded'}
    type: uri
    index: 4
package_version: 0.0.1-snapshot-1
class: extension
kind: complex-type
url: http://hl7.org/fhir/1.0/StructureDefinition/extension-MedicationDispense.dosageInstruction.asNeeded
base: http://hl7.org/fhir/StructureDefinition/Extension
version: 0.0.1-snapshot-1
required: [url]