{
  "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.",
  "_filename": "StructureDefinition-mcode-radiotherapy-modality-and-technique.json",
  "package_name": "hl7.fhir.us.mcode",
  "date": "2023-10-25T23:24:11+00:00",
  "derivation": "constraint",
  "publisher": "HL7 International / Clinical Interoperability Council",
  "fhirVersion": "4.0.1",
  "jurisdiction": [ {
    "coding": [ {
      "code": "US",
      "system": "urn:iso:std:iso:3166",
      "display": "United States of America"
    } ]
  } ],
  "name": "RadiotherapyModalityAndTechnique",
  "mapping": [ {
    "uri": "http://hl7.org/v3",
    "name": "RIM Mapping",
    "identity": "rim"
  } ],
  "abstract": false,
  "type": "Extension",
  "experimental": null,
  "resourceType": "StructureDefinition",
  "title": "Radiotherapy Modality And Technique Extension",
  "package_version": "3.0.0",
  "extension": [ {
    "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm",
    "valueInteger": 3
  }, {
    "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-wg",
    "valueCode": "cic"
  } ],
  "snapshot": {
    "element": [ {
      "constraint": [ {
        "key": "ele-1",
        "human": "All FHIR elements must have a @value or children",
        "xpath": "@value|f:*|h:div",
        "source": "http://hl7.org/fhir/StructureDefinition/Element",
        "severity": "error",
        "expression": "hasValue() or (children().count() > id.count())"
      }, {
        "key": "ext-1",
        "human": "Must have either extensions or value[x], not both",
        "xpath": "exists(f:extension)!=exists(f:*[starts-with(local-name(.), 'value')])",
        "source": "http://hl7.org/fhir/StructureDefinition/Extension",
        "severity": "error",
        "expression": "extension.exists() != value.exists()"
      }, {
        "key": "TechniquesForNeutronBeamModality",
        "human": "Allowed Techniques for Neutron Beam Modality",
        "source": "http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality-and-technique",
        "severity": "error",
        "expression": "extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').value.exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').value.coding.exists(system = 'http://snomed.info/sct' and code = '80347004')\n   implies\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').value.exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').value.coding.exists(code = 'UNC' or code = '169317000' or code = '1162782007')"
      }, {
        "key": "TechniquesForPhotonBeamModality",
        "human": "Allowed Techniques for Photon Beam Modality",
        "source": "http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality-and-technique",
        "severity": "error",
        "expression": "extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').value.exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').value.coding.exists(system = 'http://snomed.info/sct' and code = '1156506007')\n   implies\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').value.exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').value.coding.exists(code = 'UNC' or code = '441799006' or code = '1156530009' or code = '1162782007' or code = '1156526006' or code = '168524008' or code = '1156530009' or code = '1163157007')"
      }, {
        "key": "TechniquesForElectronBeamModality",
        "human": "Allowed Techniques for Electron Beam Modality",
        "source": "http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality-and-technique",
        "severity": "error",
        "expression": "extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').value.exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').value.coding.exists(system = 'http://snomed.info/sct' and code = '45643008')\n   implies\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').value.exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').value.coding.exists(code = 'UNC' or code = '1162782007' or code = '1156526006' or code = '168524008' or code = '1163157007')"
      }, {
        "key": "TechniquesForCarbonIonBeamModality",
        "human": "Allowed Techniques for Carbon Ion Beam Modality",
        "source": "http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality-and-technique",
        "severity": "error",
        "expression": "extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').value.exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').value.coding.exists(system = 'http://snomed.info/sct' and code = '1156505006')\n   implies\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').value.exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').value.coding.exists(code = 'UNC' or code = '1156529004' or code = '1156528007' or code='1204242009')"
      }, {
        "key": "TechniquesForProtonBeamModality",
        "human": "Allowed Techniques for Proton Beam Modality",
        "source": "http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality-and-technique",
        "severity": "error",
        "expression": "extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').value.exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').value.coding.exists(system = 'http://snomed.info/sct' and code = '10611004')\n   implies\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').value.exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').value.coding.exists(code = 'UNC' or code = '1156529004' or code = '1156528007' or code = '1204242009' or code = '1163157007')"
      }, {
        "key": "TechniquesForInternalRadiotherapyPermanentSeeds",
        "human": "Allowed Techniques for Internal Radiotherapy - Permanent Seeds",
        "source": "http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality-and-technique",
        "severity": "error",
        "expression": "extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').value.exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').value.coding.exists(system = 'http://snomed.info/sct' and code = '169359004')\n   implies\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').value.exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').value.coding.exists(code = 'UNC' or code = '113120007')"
      }, {
        "key": "TechniquesForLowDoseRateUsingTempRadSource",
        "human": "Allowed Techniques for Low Dose Rate Using Temp Radiation Source",
        "source": "http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality-and-technique",
        "severity": "error",
        "expression": "extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').value.exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').value.coding.exists(system = 'http://snomed.info/sct' and code = '1156708005')\n   implies\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').value.exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').value.coding.exists(code = 'UNC' or code = '384692006' or code = '113120007' or code = '14473006')"
      }, {
        "key": "TechniquesForPulsedDoseRate",
        "human": "Allowed Techniques for Pulsed Dose Rate",
        "source": "http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality-and-technique",
        "severity": "error",
        "expression": "extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').value.exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').value.coding.exists(system = 'http://snomed.info/sct' and code = '1156384006')\n   implies\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').value.exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').value.coding.exists(code = 'UNC' or code = '1156384006')"
      }, {
        "key": "TechniquesForHighDoseRate",
        "human": "Allowed Techniques for High Dose Rate",
        "source": "http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality-and-technique",
        "severity": "error",
        "expression": "extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').value.exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').value.coding.exists(system = 'http://snomed.info/sct' and code = '394902000')\n   implies\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').value.exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').value.coding.exists(code = 'UNC' or code = '394902000')"
      }, {
        "key": "TechniquesForHighDoseRateElectronic",
        "human": "Allowed Techniques for High Dose Rate Electronic",
        "source": "http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality-and-technique",
        "severity": "error",
        "expression": "extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').value.exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').value.coding.exists(system = 'http://snomed.info/sct' and code = '438629002')\n   implies\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').value.exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').value.coding.exists(code = 'UNC' or code = '384692006' or code = '1156382005' or code = '113120007' or code = '384691004' or code = '168524008' or code = '14473006')"
      }, {
        "key": "TechniquesForRadioPharmaceutical",
        "human": "Allowed Techniques for Radiopharmaceutical",
        "source": "http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality-and-technique",
        "severity": "error",
        "expression": "extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').value.exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').value.coding.exists(system = 'http://snomed.info/sct' and code = '440252007')\n   implies\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').value.exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').value.coding.exists(code = 'UNC' or code = '16560241000119104' or code = '1156383000' or code = '384692006' or code = '113120007')"
      }, {
        "key": "ModalityTextRequiredForOther",
        "human": "Require a text literal for code other",
        "source": "http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality-and-technique",
        "severity": "error",
        "expression": "extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').value.exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').value.coding.exists(system = 'http://terminology.hl7.org/CodeSystem/v3-NullFlavor' and code = 'UNC')\n   implies\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').value.text.exists()"
      }, {
        "key": "TechniqueTextRequiredForOther",
        "human": "Require a text literal for code other",
        "source": "http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality-and-technique",
        "severity": "error",
        "expression": "extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').value.exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').value.coding.exists(system = 'http://terminology.hl7.org/CodeSystem/v3-NullFlavor' and code = 'UNC')\n   implies\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').value.text.exists()"
      } ],
      "path": "Extension",
      "min": 0,
      "definition": "Extension capturing modality and technique of a given radiotherapy procedure.  The allowed combinations of modality and technique are constrained by invariants, one per modality.",
      "isModifier": false,
      "short": "Radiotherapy Modality And Technique Extension",
      "max": "*",
      "id": "Extension",
      "condition": [ "ele-1" ],
      "base": {
        "max": "*",
        "min": 0,
        "path": "Extension"
      }
    }, {
      "path": "Extension.id",
      "min": 0,
      "definition": "Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.",
      "isModifier": false,
      "short": "Unique id for inter-element referencing",
      "mapping": [ {
        "map": "n/a",
        "identity": "rim"
      } ],
      "type": [ {
        "code": "http://hl7.org/fhirpath/System.String",
        "extension": [ {
          "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type",
          "valueUrl": "string"
        } ]
      } ],
      "representation": [ "xmlAttr" ],
      "max": "1",
      "id": "Extension.id",
      "base": {
        "max": "1",
        "min": 0,
        "path": "Element.id"
      },
      "isSummary": false
    }, {
      "constraint": [ {
        "key": "ele-1",
        "human": "All FHIR elements must have a @value or children",
        "xpath": "@value|f:*|h:div",
        "source": "http://hl7.org/fhir/StructureDefinition/Element",
        "severity": "error",
        "expression": "hasValue() or (children().count() > id.count())"
      }, {
        "key": "ext-1",
        "human": "Must have either extensions or value[x], not both",
        "xpath": "exists(f:extension)!=exists(f:*[starts-with(local-name(.), \"value\")])",
        "source": "http://hl7.org/fhir/StructureDefinition/Extension",
        "severity": "error",
        "expression": "extension.exists() != value.exists()"
      } ],
      "path": "Extension.extension",
      "min": 1,
      "definition": "An Extension",
      "isModifier": false,
      "short": "Extension",
      "slicing": {
        "rules": "open",
        "description": "Extensions are always sliced by (at least) url",
        "discriminator": [ {
          "path": "url",
          "type": "value"
        } ]
      },
      "type": [ {
        "code": "Extension"
      } ],
      "max": "*",
      "id": "Extension.extension",
      "base": {
        "max": "*",
        "min": 0,
        "path": "Element.extension"
      },
      "isSummary": false
    }, {
      "constraint": [ {
        "key": "ele-1",
        "human": "All FHIR elements must have a @value or children",
        "xpath": "@value|f:*|h:div",
        "source": "http://hl7.org/fhir/StructureDefinition/Element",
        "severity": "error",
        "expression": "hasValue() or (children().count() > id.count())"
      }, {
        "key": "ext-1",
        "human": "Must have either extensions or value[x], not both",
        "xpath": "exists(f:extension)!=exists(f:*[starts-with(local-name(.), \"value\")])",
        "source": "http://hl7.org/fhir/StructureDefinition/Extension",
        "severity": "error",
        "expression": "extension.exists() != value.exists()"
      } ],
      "path": "Extension.extension",
      "min": 1,
      "definition": "Extension capturing a modality of external beam or brachytherapy radiation procedures.",
      "isModifier": false,
      "short": "Radiotherapy Modality Extension",
      "type": [ {
        "code": "Extension",
        "profile": [ "http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality" ]
      } ],
      "mustSupport": true,
      "sliceName": "modality",
      "max": "1",
      "id": "Extension.extension:modality",
      "base": {
        "max": "*",
        "min": 0,
        "path": "Element.extension"
      },
      "isSummary": false
    }, {
      "path": "Extension.extension.id",
      "min": 0,
      "definition": "Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.",
      "isModifier": false,
      "short": "Unique id for inter-element referencing",
      "mapping": [ {
        "map": "n/a",
        "identity": "rim"
      } ],
      "type": [ {
        "code": "http://hl7.org/fhirpath/System.String",
        "extension": [ {
          "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type",
          "valueUrl": "string"
        } ]
      } ],
      "representation": [ "xmlAttr" ],
      "max": "1",
      "id": "Extension.extension:modality.id",
      "base": {
        "max": "1",
        "min": 0,
        "path": "Element.id"
      },
      "isSummary": false
    }, {
      "constraint": [ {
        "key": "ele-1",
        "human": "All FHIR elements must have a @value or children",
        "xpath": "@value|f:*|h:div",
        "source": "http://hl7.org/fhir/StructureDefinition/Element",
        "severity": "error",
        "expression": "hasValue() or (children().count() > id.count())"
      }, {
        "key": "ext-1",
        "human": "Must have either extensions or value[x], not both",
        "xpath": "exists(f:extension)!=exists(f:*[starts-with(local-name(.), \"value\")])",
        "source": "http://hl7.org/fhir/StructureDefinition/Extension",
        "severity": "error",
        "expression": "extension.exists() != value.exists()"
      } ],
      "path": "Extension.extension.extension",
      "min": 0,
      "definition": "An Extension",
      "isModifier": false,
      "short": "Extension",
      "slicing": {
        "rules": "open",
        "description": "Extensions are always sliced by (at least) url",
        "discriminator": [ {
          "path": "url",
          "type": "value"
        } ]
      },
      "type": [ {
        "code": "Extension"
      } ],
      "max": "0",
      "id": "Extension.extension:modality.extension",
      "base": {
        "max": "*",
        "min": 0,
        "path": "Element.extension"
      },
      "isSummary": false
    }, {
      "path": "Extension.extension.url",
      "min": 1,
      "definition": "Source of the definition for the extension code - a logical name or a URL.",
      "isModifier": false,
      "short": "identifies the meaning of the extension",
      "fixedUri": "http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality",
      "mapping": [ {
        "map": "N/A",
        "identity": "rim"
      } ],
      "type": [ {
        "code": "http://hl7.org/fhirpath/System.String",
        "extension": [ {
          "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type",
          "valueUrl": "uri"
        } ]
      } ],
      "representation": [ "xmlAttr" ],
      "max": "1",
      "id": "Extension.extension:modality.url",
      "comment": "The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.",
      "base": {
        "max": "1",
        "min": 1,
        "path": "Extension.url"
      },
      "isSummary": false
    }, {
      "constraint": [ {
        "key": "ele-1",
        "human": "All FHIR elements must have a @value or children",
        "xpath": "@value|f:*|h:div",
        "source": "http://hl7.org/fhir/StructureDefinition/Element",
        "severity": "error",
        "expression": "hasValue() or (children().count() > id.count())"
      } ],
      "path": "Extension.extension.value[x]",
      "min": 1,
      "definition": "Value of extension - must be one of a constrained set of the data types (see [Extensibility](http://hl7.org/fhir/R4/extensibility.html) for a list).",
      "isModifier": false,
      "short": "Value of extension",
      "mapping": [ {
        "map": "N/A",
        "identity": "rim"
      } ],
      "type": [ {
        "code": "CodeableConcept"
      } ],
      "binding": {
        "strength": "required",
        "valueSet": "http://hl7.org/fhir/us/mcode/ValueSet/mcode-radiotherapy-modality-vs"
      },
      "max": "1",
      "id": "Extension.extension:modality.value[x]",
      "base": {
        "max": "1",
        "min": 0,
        "path": "Extension.value[x]"
      },
      "isSummary": false
    }, {
      "constraint": [ {
        "key": "ele-1",
        "human": "All FHIR elements must have a @value or children",
        "xpath": "@value|f:*|h:div",
        "source": "http://hl7.org/fhir/StructureDefinition/Element",
        "severity": "error",
        "expression": "hasValue() or (children().count() > id.count())"
      }, {
        "key": "ext-1",
        "human": "Must have either extensions or value[x], not both",
        "xpath": "exists(f:extension)!=exists(f:*[starts-with(local-name(.), \"value\")])",
        "source": "http://hl7.org/fhir/StructureDefinition/Extension",
        "severity": "error",
        "expression": "extension.exists() != value.exists()"
      } ],
      "path": "Extension.extension",
      "min": 0,
      "definition": "Extension capturing a technique of external beam or brachytherapy radiation procedures.",
      "isModifier": false,
      "short": "Radiotherapy Technique Extension",
      "type": [ {
        "code": "Extension",
        "profile": [ "http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique" ]
      } ],
      "mustSupport": true,
      "sliceName": "technique",
      "max": "*",
      "id": "Extension.extension:technique",
      "base": {
        "max": "*",
        "min": 0,
        "path": "Element.extension"
      },
      "isSummary": false
    }, {
      "path": "Extension.extension.id",
      "min": 0,
      "definition": "Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.",
      "isModifier": false,
      "short": "Unique id for inter-element referencing",
      "mapping": [ {
        "map": "n/a",
        "identity": "rim"
      } ],
      "type": [ {
        "code": "http://hl7.org/fhirpath/System.String",
        "extension": [ {
          "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type",
          "valueUrl": "string"
        } ]
      } ],
      "representation": [ "xmlAttr" ],
      "max": "1",
      "id": "Extension.extension:technique.id",
      "base": {
        "max": "1",
        "min": 0,
        "path": "Element.id"
      },
      "isSummary": false
    }, {
      "constraint": [ {
        "key": "ele-1",
        "human": "All FHIR elements must have a @value or children",
        "xpath": "@value|f:*|h:div",
        "source": "http://hl7.org/fhir/StructureDefinition/Element",
        "severity": "error",
        "expression": "hasValue() or (children().count() > id.count())"
      }, {
        "key": "ext-1",
        "human": "Must have either extensions or value[x], not both",
        "xpath": "exists(f:extension)!=exists(f:*[starts-with(local-name(.), \"value\")])",
        "source": "http://hl7.org/fhir/StructureDefinition/Extension",
        "severity": "error",
        "expression": "extension.exists() != value.exists()"
      } ],
      "path": "Extension.extension.extension",
      "min": 0,
      "definition": "An Extension",
      "isModifier": false,
      "short": "Extension",
      "slicing": {
        "rules": "open",
        "description": "Extensions are always sliced by (at least) url",
        "discriminator": [ {
          "path": "url",
          "type": "value"
        } ]
      },
      "type": [ {
        "code": "Extension"
      } ],
      "max": "0",
      "id": "Extension.extension:technique.extension",
      "base": {
        "max": "*",
        "min": 0,
        "path": "Element.extension"
      },
      "isSummary": false
    }, {
      "path": "Extension.extension.url",
      "min": 1,
      "definition": "Source of the definition for the extension code - a logical name or a URL.",
      "isModifier": false,
      "short": "identifies the meaning of the extension",
      "fixedUri": "http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique",
      "mapping": [ {
        "map": "N/A",
        "identity": "rim"
      } ],
      "type": [ {
        "code": "http://hl7.org/fhirpath/System.String",
        "extension": [ {
          "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type",
          "valueUrl": "uri"
        } ]
      } ],
      "representation": [ "xmlAttr" ],
      "max": "1",
      "id": "Extension.extension:technique.url",
      "comment": "The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.",
      "base": {
        "max": "1",
        "min": 1,
        "path": "Extension.url"
      },
      "isSummary": false
    }, {
      "constraint": [ {
        "key": "ele-1",
        "human": "All FHIR elements must have a @value or children",
        "xpath": "@value|f:*|h:div",
        "source": "http://hl7.org/fhir/StructureDefinition/Element",
        "severity": "error",
        "expression": "hasValue() or (children().count() > id.count())"
      } ],
      "path": "Extension.extension.value[x]",
      "min": 1,
      "definition": "Value of extension - must be one of a constrained set of the data types (see [Extensibility](http://hl7.org/fhir/R4/extensibility.html) for a list).",
      "isModifier": false,
      "short": "Value of extension",
      "mapping": [ {
        "map": "N/A",
        "identity": "rim"
      } ],
      "type": [ {
        "code": "CodeableConcept"
      } ],
      "binding": {
        "strength": "required",
        "valueSet": "http://hl7.org/fhir/us/mcode/ValueSet/mcode-radiotherapy-technique-vs"
      },
      "max": "1",
      "id": "Extension.extension:technique.value[x]",
      "base": {
        "max": "1",
        "min": 0,
        "path": "Extension.value[x]"
      },
      "isSummary": false
    }, {
      "path": "Extension.url",
      "min": 1,
      "definition": "Source of the definition for the extension code - a logical name or a URL.",
      "isModifier": false,
      "short": "identifies the meaning of the extension",
      "fixedUri": "http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality-and-technique",
      "mapping": [ {
        "map": "N/A",
        "identity": "rim"
      } ],
      "type": [ {
        "code": "http://hl7.org/fhirpath/System.String",
        "extension": [ {
          "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type",
          "valueUrl": "uri"
        } ]
      } ],
      "representation": [ "xmlAttr" ],
      "max": "1",
      "id": "Extension.url",
      "comment": "The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.",
      "base": {
        "max": "1",
        "min": 1,
        "path": "Extension.url"
      },
      "isSummary": false
    }, {
      "constraint": [ {
        "key": "ele-1",
        "human": "All FHIR elements must have a @value or children",
        "xpath": "@value|f:*|h:div",
        "source": "http://hl7.org/fhir/StructureDefinition/Element",
        "severity": "error",
        "expression": "hasValue() or (children().count() > id.count())"
      } ],
      "path": "Extension.value[x]",
      "min": 0,
      "definition": "Value of extension - must be one of a constrained set of the data types (see [Extensibility](http://hl7.org/fhir/R4/extensibility.html) for a list).",
      "isModifier": false,
      "short": "Value of extension",
      "mapping": [ {
        "map": "N/A",
        "identity": "rim"
      } ],
      "type": [ {
        "code": "base64Binary"
      }, {
        "code": "boolean"
      }, {
        "code": "canonical"
      }, {
        "code": "code"
      }, {
        "code": "date"
      }, {
        "code": "dateTime"
      }, {
        "code": "decimal"
      }, {
        "code": "id"
      }, {
        "code": "instant"
      }, {
        "code": "integer"
      }, {
        "code": "markdown"
      }, {
        "code": "oid"
      }, {
        "code": "positiveInt"
      }, {
        "code": "string"
      }, {
        "code": "time"
      }, {
        "code": "unsignedInt"
      }, {
        "code": "uri"
      }, {
        "code": "url"
      }, {
        "code": "uuid"
      }, {
        "code": "Address"
      }, {
        "code": "Age"
      }, {
        "code": "Annotation"
      }, {
        "code": "Attachment"
      }, {
        "code": "CodeableConcept"
      }, {
        "code": "Coding"
      }, {
        "code": "ContactPoint"
      }, {
        "code": "Count"
      }, {
        "code": "Distance"
      }, {
        "code": "Duration"
      }, {
        "code": "HumanName"
      }, {
        "code": "Identifier"
      }, {
        "code": "Money"
      }, {
        "code": "Period"
      }, {
        "code": "Quantity"
      }, {
        "code": "Range"
      }, {
        "code": "Ratio"
      }, {
        "code": "Reference"
      }, {
        "code": "SampledData"
      }, {
        "code": "Signature"
      }, {
        "code": "Timing"
      }, {
        "code": "ContactDetail"
      }, {
        "code": "Contributor"
      }, {
        "code": "DataRequirement"
      }, {
        "code": "Expression"
      }, {
        "code": "ParameterDefinition"
      }, {
        "code": "RelatedArtifact"
      }, {
        "code": "TriggerDefinition"
      }, {
        "code": "UsageContext"
      }, {
        "code": "Dosage"
      }, {
        "code": "Meta"
      } ],
      "max": "0",
      "id": "Extension.value[x]",
      "base": {
        "max": "1",
        "min": 0,
        "path": "Extension.value[x]"
      },
      "isSummary": false
    } ]
  },
  "status": "draft",
  "id": "c4f0aad4-aa36-41cb-b0ab-3fe193f07042",
  "kind": "complex-type",
  "url": "http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality-and-technique",
  "context": [ {
    "type": "element",
    "expression": "DomainResource"
  }, {
    "type": "element",
    "expression": "Extension"
  } ],
  "version": "3.0.0",
  "differential": {
    "element": [ {
      "id": "Extension",
      "path": "Extension",
      "short": "Radiotherapy Modality And Technique Extension",
      "constraint": [ {
        "key": "TechniquesForNeutronBeamModality",
        "human": "Allowed Techniques for Neutron Beam Modality",
        "source": "http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality-and-technique",
        "severity": "error",
        "expression": "extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').value.exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').value.coding.exists(system = 'http://snomed.info/sct' and code = '80347004')\n   implies\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').value.exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').value.coding.exists(code = 'UNC' or code = '169317000' or code = '1162782007')"
      }, {
        "key": "TechniquesForPhotonBeamModality",
        "human": "Allowed Techniques for Photon Beam Modality",
        "source": "http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality-and-technique",
        "severity": "error",
        "expression": "extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').value.exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').value.coding.exists(system = 'http://snomed.info/sct' and code = '1156506007')\n   implies\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').value.exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').value.coding.exists(code = 'UNC' or code = '441799006' or code = '1156530009' or code = '1162782007' or code = '1156526006' or code = '168524008' or code = '1156530009' or code = '1163157007')"
      }, {
        "key": "TechniquesForElectronBeamModality",
        "human": "Allowed Techniques for Electron Beam Modality",
        "source": "http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality-and-technique",
        "severity": "error",
        "expression": "extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').value.exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').value.coding.exists(system = 'http://snomed.info/sct' and code = '45643008')\n   implies\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').value.exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').value.coding.exists(code = 'UNC' or code = '1162782007' or code = '1156526006' or code = '168524008' or code = '1163157007')"
      }, {
        "key": "TechniquesForCarbonIonBeamModality",
        "human": "Allowed Techniques for Carbon Ion Beam Modality",
        "source": "http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality-and-technique",
        "severity": "error",
        "expression": "extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').value.exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').value.coding.exists(system = 'http://snomed.info/sct' and code = '1156505006')\n   implies\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').value.exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').value.coding.exists(code = 'UNC' or code = '1156529004' or code = '1156528007' or code='1204242009')"
      }, {
        "key": "TechniquesForProtonBeamModality",
        "human": "Allowed Techniques for Proton Beam Modality",
        "source": "http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality-and-technique",
        "severity": "error",
        "expression": "extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').value.exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').value.coding.exists(system = 'http://snomed.info/sct' and code = '10611004')\n   implies\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').value.exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').value.coding.exists(code = 'UNC' or code = '1156529004' or code = '1156528007' or code = '1204242009' or code = '1163157007')"
      }, {
        "key": "TechniquesForInternalRadiotherapyPermanentSeeds",
        "human": "Allowed Techniques for Internal Radiotherapy - Permanent Seeds",
        "source": "http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality-and-technique",
        "severity": "error",
        "expression": "extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').value.exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').value.coding.exists(system = 'http://snomed.info/sct' and code = '169359004')\n   implies\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').value.exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').value.coding.exists(code = 'UNC' or code = '113120007')"
      }, {
        "key": "TechniquesForLowDoseRateUsingTempRadSource",
        "human": "Allowed Techniques for Low Dose Rate Using Temp Radiation Source",
        "source": "http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality-and-technique",
        "severity": "error",
        "expression": "extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').value.exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').value.coding.exists(system = 'http://snomed.info/sct' and code = '1156708005')\n   implies\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').value.exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').value.coding.exists(code = 'UNC' or code = '384692006' or code = '113120007' or code = '14473006')"
      }, {
        "key": "TechniquesForPulsedDoseRate",
        "human": "Allowed Techniques for Pulsed Dose Rate",
        "source": "http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality-and-technique",
        "severity": "error",
        "expression": "extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').value.exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').value.coding.exists(system = 'http://snomed.info/sct' and code = '1156384006')\n   implies\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').value.exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').value.coding.exists(code = 'UNC' or code = '1156384006')"
      }, {
        "key": "TechniquesForHighDoseRate",
        "human": "Allowed Techniques for High Dose Rate",
        "source": "http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality-and-technique",
        "severity": "error",
        "expression": "extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').value.exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').value.coding.exists(system = 'http://snomed.info/sct' and code = '394902000')\n   implies\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').value.exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').value.coding.exists(code = 'UNC' or code = '394902000')"
      }, {
        "key": "TechniquesForHighDoseRateElectronic",
        "human": "Allowed Techniques for High Dose Rate Electronic",
        "source": "http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality-and-technique",
        "severity": "error",
        "expression": "extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').value.exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').value.coding.exists(system = 'http://snomed.info/sct' and code = '438629002')\n   implies\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').value.exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').value.coding.exists(code = 'UNC' or code = '384692006' or code = '1156382005' or code = '113120007' or code = '384691004' or code = '168524008' or code = '14473006')"
      }, {
        "key": "TechniquesForRadioPharmaceutical",
        "human": "Allowed Techniques for Radiopharmaceutical",
        "source": "http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality-and-technique",
        "severity": "error",
        "expression": "extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').value.exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').value.coding.exists(system = 'http://snomed.info/sct' and code = '440252007')\n   implies\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').value.exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').value.coding.exists(code = 'UNC' or code = '16560241000119104' or code = '1156383000' or code = '384692006' or code = '113120007')"
      }, {
        "key": "ModalityTextRequiredForOther",
        "human": "Require a text literal for code other",
        "source": "http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality-and-technique",
        "severity": "error",
        "expression": "extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').value.exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').value.coding.exists(system = 'http://terminology.hl7.org/CodeSystem/v3-NullFlavor' and code = 'UNC')\n   implies\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').value.text.exists()"
      }, {
        "key": "TechniqueTextRequiredForOther",
        "human": "Require a text literal for code other",
        "source": "http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality-and-technique",
        "severity": "error",
        "expression": "extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').value.exists() and\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').value.coding.exists(system = 'http://terminology.hl7.org/CodeSystem/v3-NullFlavor' and code = 'UNC')\n   implies\n      extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').value.text.exists()"
      } ],
      "definition": "Extension capturing modality and technique of a given radiotherapy procedure.  The allowed combinations of modality and technique are constrained by invariants, one per modality."
    }, {
      "id": "Extension.extension",
      "min": 1,
      "path": "Extension.extension"
    }, {
      "id": "Extension.extension:modality",
      "max": "1",
      "min": 1,
      "path": "Extension.extension",
      "type": [ {
        "code": "Extension",
        "profile": [ "http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality" ]
      } ],
      "sliceName": "modality",
      "mustSupport": true
    }, {
      "id": "Extension.extension:modality.value[x]",
      "path": "Extension.extension.value[x]",
      "binding": {
        "strength": "required",
        "valueSet": "http://hl7.org/fhir/us/mcode/ValueSet/mcode-radiotherapy-modality-vs"
      }
    }, {
      "id": "Extension.extension:technique",
      "max": "*",
      "min": 0,
      "path": "Extension.extension",
      "type": [ {
        "code": "Extension",
        "profile": [ "http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique" ]
      } ],
      "sliceName": "technique",
      "mustSupport": true
    }, {
      "id": "Extension.extension:technique.value[x]",
      "path": "Extension.extension.value[x]",
      "binding": {
        "strength": "required",
        "valueSet": "http://hl7.org/fhir/us/mcode/ValueSet/mcode-radiotherapy-technique-vs"
      }
    }, {
      "id": "Extension.url",
      "path": "Extension.url",
      "fixedUri": "http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality-and-technique"
    }, {
      "id": "Extension.value[x]",
      "max": "0",
      "path": "Extension.value[x]"
    } ]
  },
  "contact": [ {
    "name": "HL7 International / Clinical Interoperability Council",
    "telecom": [ {
      "value": "http://www.hl7.org/Special/committees/cic",
      "system": "url"
    }, {
      "value": "ciclist@lists.HL7.org",
      "system": "email"
    } ]
  } ],
  "baseDefinition": "http://hl7.org/fhir/StructureDefinition/Extension"
}