description: Pre-adopt of the `Dosage.asNeededFor` concept from the FHIR R5 Dosage data type. In R4, `Dosage.asNeededCodeableConcept` has a maximum cardinality of 1. Additional 'asNeeded' data can be represented by adding this extension to Dosage.
package_name: nictiz.fhir.nl.r4.medicationprocess9
derivation: constraint
name: ExtDosageAsNeededFor
type: Extension
elements:
  url:
    pattern: {type: Uri, value: 'http://nictiz.nl/fhir/StructureDefinition/ext-Dosage-AsNeededFor'}
    index: 0
  value:
    choices: [valueCodeableConcept]
    index: 2
  valueCodeableConcept: {type: CodeableConcept, choiceOf: value, index: 3}
package_version: 2.0.0-beta.5
class: extension
kind: complex-type
url: http://nictiz.nl/fhir/StructureDefinition/ext-Dosage-AsNeededFor
base: http://hl7.org/fhir/StructureDefinition/Extension
version: 2.0.0-beta.5