description: Sometimes it is not possible to use the ValueSet from the functional description on the corresponding FHIR element. This is a common occurence when the FHIR element has datatype _code_ and has a _required_ binding with an incompatible FHIR core ValueSet. It can also happen when the FHIR element has a _string_ or other non-coded datatype.\r\n\r\nIn this case, the FHIR element may be augmented with this extension to communicate the code from the functional description. This information should always be _added_ to the normal use of the FHIR element to allow for maximum interoperability.
package_name: healthdata.be.r4.cbb
derivation: constraint
name: ExtCodeSpecification
type: Extension
elements:
  url:
    pattern: {type: Uri, value: 'https://fhir.healthdata.be/StructureDefinition/ext-CodeSpecification'}
    index: 0
  value:
    choices: [valueCodeableConcept]
    index: 2
  valueCodeableConcept: {type: CodeableConcept, choiceOf: value, index: 3}
package_version: 0.16.0-beta
class: extension
kind: complex-type
url: https://fhir.healthdata.be/StructureDefinition/ext-CodeSpecification
base: http://hl7.org/fhir/StructureDefinition/Extension
version: null