description: Extension capturing modality and technique of a given radiotherapy procedure.  The allowed combinations of modality and technique are constrained by invariants, one per modality.
package_name: hl7.fhir.us.mcode
derivation: constraint
name: RadiotherapyModalityAndTechnique
type: Extension
elements:
  extension:
    index: 0
    slicing:
      slices:
        modality:
          match: {}
          schema:
            type: Extension
            mustSupport: true
            url: http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality
            index: 1
            elements:
              value:
                choices: []
                index: 3
        technique:
          match: {}
          schema:
            type: Extension
            mustSupport: true
            url: http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique
            index: 4
            elements:
              value:
                choices: []
                index: 6
  url:
    pattern: {type: Uri, value: 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality-and-technique'}
    index: 7
  value:
    choices: []
    index: 9
package_version: 2.0.0
extensions:
  modality:
    url: http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality
    type: Extension
    mustSupport: true
    index: 1
    elements:
      value:
        choices: []
        index: 3
  technique:
    url: http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique
    type: Extension
    mustSupport: true
    index: 4
    elements:
      value:
        choices: []
        index: 6
class: extension
kind: complex-type
url: http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality-and-technique
base: http://hl7.org/fhir/StructureDefinition/Extension
version: 2.0.0
required: [extension]