{
  "resourceType": "StructureDefinition",
  "id": "mcode-radiotherapy-modality-and-technique",
  "text": {
    "status": "extensions",
    "div": "<div xmlns=\"http://www.w3.org/1999/xhtml\"><table border=\"0\" cellpadding=\"0\" cellspacing=\"0\" style=\"border: 0px #F0F0F0 solid; font-size: 11px; font-family: verdana; vertical-align: top;\"><tr style=\"border: 1px #F0F0F0 solid; font-size: 11px; font-family: verdana; vertical-align: top\"><th style=\"vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"><a href=\"http://hl7.org/fhir/R4/formats.html#table\" title=\"The logical name of the element\">Name</a></th><th style=\"vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"><a href=\"http://hl7.org/fhir/R4/formats.html#table\" title=\"Information about the use of the element\">Flags</a></th><th style=\"vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"><a href=\"http://hl7.org/fhir/R4/formats.html#table\" title=\"Minimum and Maximum # of times the the element can appear in the instance\">Card.</a></th><th style=\"width: 100px\" class=\"hierarchy\"><a href=\"http://hl7.org/fhir/R4/formats.html#table\" title=\"Reference to the type of the element\">Type</a></th><th style=\"vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"><a href=\"http://hl7.org/fhir/R4/formats.html#table\" title=\"Additional information about the element\">Description &amp; Constraints</a><span style=\"float: right\"><a href=\"http://hl7.org/fhir/R4/formats.html#table\" title=\"Legend for this format\"><img src=\"http://hl7.org/fhir/R4/help16.png\" alt=\"doco\" style=\"background-color: inherit\"/></a></span></th></tr><tr style=\"border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: white\"><td style=\"vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(tbl_bck1.png)\" class=\"hierarchy\"><img src=\"tbl_spacer.png\" alt=\".\" style=\"background-color: inherit\" class=\"hierarchy\"/><img src=\"icon_element.gif\" alt=\".\" style=\"background-color: white; background-color: inherit\" title=\"Element\" class=\"hierarchy\"/> <a href=\"StructureDefinition-mcode-radiotherapy-modality-and-technique-definitions.html#Extension\" title=\"Extension capturing modality and technique of a given radiotherapy procedure.  The allowed combinations of modality and technique are constrained by invariants, one per modality.\">Extension</a><a name=\"Extension\"> </a></td><td style=\"vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"><span style=\"padding-left: 3px; padding-right: 3px; color: black; null\" title=\"This element has or is affected by some invariants (TechniquesForNeutronBeamModality, TechniquesForPhotonBeamModality, TechniquesForElectronBeamModality, TechniquesForCarbonIonBeamModality, TechniquesForProtonBeamModality, TechniquesForInternalRadiotherapyPermanentSeeds, TechniquesForLowDoseRateUsingTempRadSource, TechniquesForPulsedDoseRate, TechniquesForHighDoseRate, TechniquesForHighDoseRateElectronic, TechniquesForRadioPharmaceutical)\">I</span></td><td style=\"vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"><span style=\"opacity: 0.5\">0</span><span style=\"opacity: 0.5\">..</span><span style=\"opacity: 0.5\">*</span></td><td style=\"vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"><a href=\"http://hl7.org/fhir/R4/extensibility.html#Extension\">Extension</a></td><td style=\"vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\">Radiotherapy Modality And Technique Extension<br/><span style=\"font-weight:bold\">TechniquesForNeutronBeamModality: </span>Allowed Techniques for Neutron Beam Modality<br/><span style=\"font-weight:bold\">TechniquesForPhotonBeamModality: </span>Allowed Techniques for Photon Beam Modality<br/><span style=\"font-weight:bold\">TechniquesForElectronBeamModality: </span>Allowed Techniques for Electron Beam Modality<br/><span style=\"font-weight:bold\">TechniquesForCarbonIonBeamModality: </span>Allowed Techniques for Carbon Ion Beam Modality<br/><span style=\"font-weight:bold\">TechniquesForProtonBeamModality: </span>Allowed Techniques for Proton Beam Modality<br/><span style=\"font-weight:bold\">TechniquesForInternalRadiotherapyPermanentSeeds: </span>Allowed Techniques for Internal Radiotherapy - Permanent Seeds<br/><span style=\"font-weight:bold\">TechniquesForLowDoseRateUsingTempRadSource: </span>Allowed Techniques for Low Dose Rate Using Temp Radiation Source<br/><span style=\"font-weight:bold\">TechniquesForPulsedDoseRate: </span>Allowed Techniques for Pulsed Dose Rate<br/><span style=\"font-weight:bold\">TechniquesForHighDoseRate: </span>Allowed Techniques for High Dose Rate<br/><span style=\"font-weight:bold\">TechniquesForHighDoseRateElectronic: </span>Allowed Techniques for High Dose Rate Electronic<br/><span style=\"font-weight:bold\">TechniquesForRadioPharmaceutical: </span>Allowed Techniques for Radiopharmaceutical</td></tr>\r\n<tr style=\"border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: #F7F7F7\"><td style=\"vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(tbl_bck10.png)\" class=\"hierarchy\"><img src=\"tbl_spacer.png\" alt=\".\" style=\"background-color: inherit\" class=\"hierarchy\"/><img src=\"tbl_vjoin.png\" alt=\".\" style=\"background-color: inherit\" class=\"hierarchy\"/><img src=\"icon_extension_simple.png\" alt=\".\" style=\"background-color: #F7F7F7; background-color: inherit\" title=\"Simple Extension\" class=\"hierarchy\"/> <a href=\"StructureDefinition-mcode-radiotherapy-modality-and-technique-definitions.html#Extension.extension\">extension</a><a name=\"Extension.extension\"> </a></td><td style=\"vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"/><td style=\"vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\">1..<span style=\"opacity: 0.5\">*</span></td><td style=\"vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"><a style=\"opacity: 0.5\" href=\"http://hl7.org/fhir/R4/extensibility.html#Extension\">Extension</a></td><td style=\"vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"><span style=\"opacity: 0.5\">Extension</span></td></tr>\r\n<tr style=\"border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: white\"><td style=\"vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(tbl_bck15.png)\" class=\"hierarchy\"><img src=\"tbl_spacer.png\" alt=\".\" style=\"background-color: inherit\" class=\"hierarchy\"/><img src=\"tbl_vjoin.png\" alt=\".\" style=\"background-color: inherit\" class=\"hierarchy\"/><img src=\"icon_slice_item.png\" alt=\".\" style=\"background-color: white; background-color: inherit\" title=\"Slice Item\" class=\"hierarchy\"/> <a href=\"StructureDefinition-mcode-radiotherapy-modality-and-technique-definitions.html#Extension.extension:modality\" title=\"Extension URL = http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality\">mcode-radiotherapy-modality</a><a name=\"Extension.extension\"> </a></td><td style=\"vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"><span style=\"padding-left: 3px; padding-right: 3px; color: white; background-color: red\" title=\"This element must be supported\">S</span></td><td style=\"vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\">1..1</td><td style=\"vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"><a href=\"http://hl7.org/fhir/R4/datatypes.html#CodeableConcept\">CodeableConcept</a></td><td style=\"vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"><span style=\"opacity: 0.5\">Radiotherapy Modality Extension</span><br/><span style=\"font-weight:bold\">URL: </span><a href=\"http://hl7.org/fhir/R4/StructureDefinition-mcode-radiotherapy-modality.html\">http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality</a></td></tr>\r\n<tr style=\"border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: #F7F7F7\"><td style=\"vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(tbl_bck140.png)\" class=\"hierarchy\"><img src=\"tbl_spacer.png\" alt=\".\" style=\"background-color: inherit\" class=\"hierarchy\"/><img src=\"tbl_vline.png\" alt=\".\" style=\"background-color: inherit\" class=\"hierarchy\"/><img src=\"tbl_vjoin_end_slice.png\" alt=\".\" style=\"background-color: inherit\" class=\"hierarchy\"/><img src=\"icon_element.gif\" alt=\".\" style=\"background-color: #F7F7F7; background-color: inherit\" title=\"Element\" class=\"hierarchy\"/> <a href=\"StructureDefinition-mcode-radiotherapy-modality-and-technique-definitions.html#Extension.extension:modality.value[x]\">value[x]</a><a name=\"Extension.extension.value_x_\"> </a></td><td style=\"vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"/><td style=\"vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"><span style=\"opacity: 0.5\">1</span><span style=\"opacity: 0.5\">..</span><span style=\"opacity: 0.5\">1</span></td><td style=\"vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"><a style=\"opacity: 0.5\" href=\"http://hl7.org/fhir/R4/datatypes.html#CodeableConcept\">CodeableConcept</a></td><td style=\"vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"><span style=\"opacity: 0.5\">Value of extension</span><br/><span style=\"font-weight:bold\">Binding: </span><a href=\"ValueSet-mcode-radiotherapy-modality-vs.html\">Radiotherapy Modality Value Set</a> (<a href=\"http://hl7.org/fhir/R4/terminologies.html#required\" title=\"To be conformant, the concept in this element SHALL be from the specified value set.\">required</a>)</td></tr>\r\n<tr style=\"border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: white\"><td style=\"vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(tbl_bck15.png)\" class=\"hierarchy\"><img src=\"tbl_spacer.png\" alt=\".\" style=\"background-color: inherit\" class=\"hierarchy\"/><img src=\"tbl_vjoin.png\" alt=\".\" style=\"background-color: inherit\" class=\"hierarchy\"/><img src=\"icon_slice_item.png\" alt=\".\" style=\"background-color: white; background-color: inherit\" title=\"Slice Item\" class=\"hierarchy\"/> <a href=\"StructureDefinition-mcode-radiotherapy-modality-and-technique-definitions.html#Extension.extension:technique\" title=\"Extension URL = http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique\">mcode-radiotherapy-technique</a><a name=\"Extension.extension\"> </a></td><td style=\"vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"><span style=\"padding-left: 3px; padding-right: 3px; color: white; background-color: red\" title=\"This element must be supported\">S</span></td><td style=\"vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\">0..*</td><td style=\"vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"><a href=\"http://hl7.org/fhir/R4/datatypes.html#CodeableConcept\">CodeableConcept</a></td><td style=\"vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"><span style=\"opacity: 0.5\">Radiotherapy Technique Extension</span><br/><span style=\"font-weight:bold\">URL: </span><a href=\"http://hl7.org/fhir/R4/StructureDefinition-mcode-radiotherapy-technique.html\">http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique</a><br/></td></tr>\r\n<tr style=\"border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: #F7F7F7\"><td style=\"vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(tbl_bck140.png)\" class=\"hierarchy\"><img src=\"tbl_spacer.png\" alt=\".\" style=\"background-color: inherit\" class=\"hierarchy\"/><img src=\"tbl_vline.png\" alt=\".\" style=\"background-color: inherit\" class=\"hierarchy\"/><img src=\"tbl_vjoin_end_slice.png\" alt=\".\" style=\"background-color: inherit\" class=\"hierarchy\"/><img src=\"icon_element.gif\" alt=\".\" style=\"background-color: #F7F7F7; background-color: inherit\" title=\"Element\" class=\"hierarchy\"/> <a href=\"StructureDefinition-mcode-radiotherapy-modality-and-technique-definitions.html#Extension.extension:technique.value[x]\">value[x]</a><a name=\"Extension.extension.value_x_\"> </a></td><td style=\"vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"/><td style=\"vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"><span style=\"opacity: 0.5\">1</span><span style=\"opacity: 0.5\">..</span><span style=\"opacity: 0.5\">1</span></td><td style=\"vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"><a style=\"opacity: 0.5\" href=\"http://hl7.org/fhir/R4/datatypes.html#CodeableConcept\">CodeableConcept</a></td><td style=\"vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"><span style=\"opacity: 0.5\">Value of extension</span><br/><span style=\"font-weight:bold\">Binding: </span><a href=\"ValueSet-mcode-radiotherapy-technique-vs.html\">Radiotherapy Technique Value Set</a> (<a href=\"http://hl7.org/fhir/R4/terminologies.html#required\" title=\"To be conformant, the concept in this element SHALL be from the specified value set.\">required</a>)</td></tr>\r\n<tr style=\"border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: white\"><td style=\"vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(tbl_bck10.png)\" class=\"hierarchy\"><img src=\"tbl_spacer.png\" alt=\".\" style=\"background-color: inherit\" class=\"hierarchy\"/><img src=\"tbl_vjoin.png\" alt=\".\" style=\"background-color: inherit\" class=\"hierarchy\"/><img src=\"icon_element.gif\" alt=\".\" style=\"background-color: white; background-color: inherit\" title=\"Element\" class=\"hierarchy\"/> <a href=\"StructureDefinition-mcode-radiotherapy-modality-and-technique-definitions.html#Extension.url\">url</a><a name=\"Extension.url\"> </a></td><td style=\"vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"/><td style=\"vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"><span style=\"opacity: 0.5\">1</span><span style=\"opacity: 0.5\">..</span><span style=\"opacity: 0.5\">1</span></td><td style=\"vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"><a style=\"opacity: 0.5\" href=\"http://hl7.org/fhir/R4/datatypes.html#uri\">uri</a></td><td style=\"vertical-align: top; text-align : left; background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"><span style=\"color: darkgreen\">&quot;http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality-and-technique&quot;</span></td></tr>\r\n<tr style=\"border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: #F7F7F7\"><td style=\"vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(tbl_bck00.png)\" class=\"hierarchy\"><img src=\"tbl_spacer.png\" alt=\".\" style=\"background-color: inherit\" class=\"hierarchy\"/><img src=\"tbl_vjoin_end.png\" alt=\".\" style=\"background-color: inherit\" class=\"hierarchy\"/><img src=\"icon_element.gif\" alt=\".\" style=\"background-color: #F7F7F7; background-color: inherit\" title=\"Element\" class=\"hierarchy\"/> <span style=\"text-decoration:line-through\">value[x]</span><a name=\"Extension.value_x_\"> </a></td><td style=\"vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"/><td style=\"vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"><span style=\"text-decoration:line-through\"/><span style=\"text-decoration:line-through\">0</span><span style=\"text-decoration:line-through\">..</span><span style=\"text-decoration:line-through\">0</span></td><td style=\"vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"/><td style=\"vertical-align: top; text-align : left; background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"/></tr>\r\n<tr><td colspan=\"5\" class=\"hierarchy\"><br/><a href=\"http://hl7.org/fhir/R4/formats.html#table\" title=\"Legend for this format\"><img src=\"http://hl7.org/fhir/R4/help16.png\" alt=\"doco\" style=\"background-color: inherit\"/> Documentation for this format</a></td></tr></table></div>"
  },
  "url": "http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality-and-technique",
  "version": "2.0.0",
  "name": "RadiotherapyModalityAndTechnique",
  "title": "Radiotherapy Modality And Technique Extension",
  "status": "active",
  "date": "2022-01-18T03:17:40+00:00",
  "publisher": "HL7 International Clinical Interoperability Council",
  "contact": [
    {
      "name": "HL7 International Clinical Interoperability Council",
      "telecom": [
        {
          "system": "url",
          "value": "http://www.hl7.org/Special/committees/cic"
        },
        {
          "system": "email",
          "value": "ciclist@lists.HL7.org"
        }
      ]
    }
  ],
  "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.",
  "jurisdiction": [
    {
      "coding": [
        {
          "system": "urn:iso:std:iso:3166",
          "code": "US",
          "display": "United States of America"
        }
      ]
    }
  ],
  "fhirVersion": "4.0.1",
  "mapping": [
    {
      "identity": "rim",
      "uri": "http://hl7.org/v3",
      "name": "RIM Mapping"
    }
  ],
  "kind": "complex-type",
  "abstract": false,
  "context": [
    {
      "type": "element",
      "expression": "Procedure"
    }
  ],
  "type": "Extension",
  "baseDefinition": "http://hl7.org/fhir/StructureDefinition/Extension",
  "derivation": "constraint",
  "snapshot": {
    "element": [
      {
        "id": "Extension",
        "path": "Extension",
        "short": "Radiotherapy Modality And Technique Extension",
        "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.",
        "min": 0,
        "max": "*",
        "base": {
          "path": "Extension",
          "min": 0,
          "max": "*"
        },
        "condition": [
          "ele-1"
        ],
        "constraint": [
          {
            "key": "ele-1",
            "severity": "error",
            "human": "All FHIR elements must have a @value or children",
            "expression": "hasValue() or (children().count() > id.count())",
            "xpath": "@value|f:*|h:div",
            "source": "http://hl7.org/fhir/StructureDefinition/Element"
          },
          {
            "key": "ext-1",
            "severity": "error",
            "human": "Must have either extensions or value[x], not both",
            "expression": "extension.exists() != value.exists()",
            "xpath": "exists(f:extension)!=exists(f:*[starts-with(local-name(.), 'value')])",
            "source": "http://hl7.org/fhir/StructureDefinition/Extension"
          },
          {
            "key": "TechniquesForNeutronBeamModality",
            "severity": "error",
            "human": "Allowed Techniques for Neutron Beam Modality",
            "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-technique').exists() and\n         extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').value.exists(coding.system = 'http://snomed.info/sct' and coding.code = '80347004')\n   implies\n         extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').value.exists( (\n          coding.code = '169317000' or coding.code = '1162782007'))",
            "source": "http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality-and-technique"
          },
          {
            "key": "TechniquesForPhotonBeamModality",
            "severity": "error",
            "human": "Allowed Techniques for Photon Beam Modality",
            "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-technique').exists() and\n         extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').value.exists(coding.system = 'http://snomed.info/sct' and coding.code = '1156506007')\n   implies\n         extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').value.exists((\n          coding.code = '441799006' or coding.code = '1156530009' or\n          coding.code = '1162782007' or coding.code = '1156526006' or\n          coding.code = '168524008' or coding.code = '1156530009'))",
            "source": "http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality-and-technique"
          },
          {
            "key": "TechniquesForElectronBeamModality",
            "severity": "error",
            "human": "Allowed Techniques for Electron Beam Modality",
            "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-technique').exists() and\n         extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').value.exists(coding.system = 'http://snomed.info/sct' and coding.code = '45643008')\n   implies\n         extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').value.exists( (\n          coding.code = '1162782007' or coding.code = '1156526006' or coding.code = '168524008'))",
            "source": "http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality-and-technique"
          },
          {
            "key": "TechniquesForCarbonIonBeamModality",
            "severity": "error",
            "human": "Allowed Techniques for Carbon Ion Beam Modality",
            "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-technique').exists() and\n         extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').value.exists(coding.system = 'http://snomed.info/sct' and coding.code = '1156505006')\n   implies\n         extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').value.exists( (\n          coding.code = '1156529004' or coding.code = '1156528007' or coding.code='USCRS-33517'))",
            "source": "http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality-and-technique"
          },
          {
            "key": "TechniquesForProtonBeamModality",
            "severity": "error",
            "human": "Allowed Techniques for Proton Beam Modality",
            "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-technique').exists() and\n         extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').value.exists(coding.system = 'http://snomed.info/sct' and coding.code = '10611004')\n   implies\n         extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').value.exists( (\n          coding.code = '1156529004' or coding.code = '1156528007' or coding.code = 'USCRS-33517'))",
            "source": "http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality-and-technique"
          },
          {
            "key": "TechniquesForInternalRadiotherapyPermanentSeeds",
            "severity": "error",
            "human": "Allowed Techniques for Internal Radiotherapy - Permanent Seeds",
            "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-technique').exists() and\n         extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').value.exists(coding.system = 'http://snomed.info/sct' and coding.code = '169359004')\n   implies\n         extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').value.exists( (\n          coding.code = '113120007'))",
            "source": "http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality-and-technique"
          },
          {
            "key": "TechniquesForLowDoseRateUsingTempRadSource",
            "severity": "error",
            "human": "Allowed Techniques for Low Dose Rate Using Temp Radiation Source",
            "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-technique').exists() and\n         extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').value.exists(coding.system = 'http://snomed.info/sct' and coding.code = '1156708005')\n   implies\n         extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').value.exists(coding.system = 'http://snomed.info/sct' and (\n          coding.code = '384692006' or coding.code = '113120007' or coding.code = '14473006'))",
            "source": "http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality-and-technique"
          },
          {
            "key": "TechniquesForPulsedDoseRate",
            "severity": "error",
            "human": "Allowed Techniques for Pulsed Dose Rate",
            "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-technique').exists() and\n         extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').value.exists(coding.system = 'http://snomed.info/sct' and coding.code = '1156384006')\n   implies\n         extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').value.exists(coding.system = 'http://snomed.info/sct' and (\n          coding.code = '384692006' or coding.code = '113120007'))",
            "source": "http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality-and-technique"
          },
          {
            "key": "TechniquesForHighDoseRate",
            "severity": "error",
            "human": "Allowed Techniques for High Dose Rate",
            "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-technique').exists() and\n         extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').value.exists(coding.system = 'http://snomed.info/sct' and coding.code = '394902000')\n   implies\n         extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').value.exists(coding.system = 'http://snomed.info/sct' and (\n          coding.code = '384692006' or coding.code = '1156382005' or coding.code = '113120007' or coding.code = '1156383000' or coding.code = '384691004' or coding.code = '168524008' or coding.code = '14473006'))",
            "source": "http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality-and-technique"
          },
          {
            "key": "TechniquesForHighDoseRateElectronic",
            "severity": "error",
            "human": "Allowed Techniques for High Dose Rate Electronic",
            "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-technique').exists() and\n         extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').value.exists(coding.system = 'http://snomed.info/sct' and coding.code = '438629002')\n   implies\n         extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').value.exists(coding.system = 'http://snomed.info/sct' and (\n          coding.code = '384692006' or coding.code = '1156382005' or coding.code = '113120007' or coding.code = '384691004' or coding.code = '168524008' or coding.code = '14473006'))",
            "source": "http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality-and-technique"
          },
          {
            "key": "TechniquesForRadioPharmaceutical",
            "severity": "error",
            "human": "Allowed Techniques for Radiopharmaceutical",
            "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-technique').exists() and\n         extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').value.exists( coding.code = '440252007')\n   implies\n         extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').value.exists( (\n          coding.code = '16560241000119104' or coding.code = '1156383000' or coding.code = '384692006' or coding.code = '113120007'))",
            "source": "http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality-and-technique"
          }
        ],
        "mapping": [
          {
            "identity": "rim",
            "map": "n/a"
          },
          {
            "identity": "rim",
            "map": "N/A"
          }
        ]
      },
      {
        "id": "Extension.id",
        "path": "Extension.id",
        "representation": [
          "xmlAttr"
        ],
        "short": "Unique id for inter-element referencing",
        "definition": "Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Element.id",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "_code": {
              "extension": [
                {
                  "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-json-type",
                  "valueString": "string"
                },
                {
                  "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-xml-type",
                  "valueString": "xsd:string"
                },
                {
                  "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-rdf-type",
                  "valueString": "xsd:string"
                }
              ]
            }
          }
        ],
        "mapping": [
          {
            "identity": "rim",
            "map": "n/a"
          }
        ]
      },
      {
        "id": "Extension.extension",
        "path": "Extension.extension",
        "slicing": {
          "discriminator": [
            {
              "type": "value",
              "path": "url"
            }
          ],
          "description": "Extensions are always sliced by (at least) url",
          "rules": "open"
        },
        "short": "Additional content defined by implementations",
        "definition": "May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance  applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.",
        "comment": "There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions.  The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.",
        "alias": [
          "extensions",
          "user content"
        ],
        "min": 0,
        "max": "*",
        "base": {
          "path": "Element.extension",
          "min": 0,
          "max": "*"
        },
        "type": [
          {
            "code": "Extension"
          }
        ],
        "condition": [
          "ele-1"
        ],
        "constraint": [
          {
            "key": "ele-1",
            "severity": "error",
            "human": "All FHIR elements must have a @value or children",
            "expression": "hasValue() or (children().count() > id.count())",
            "xpath": "@value|f:*|h:div",
            "source": "http://hl7.org/fhir/StructureDefinition/Element"
          },
          {
            "key": "ext-1",
            "severity": "error",
            "human": "Must have either extensions or value[x], not both",
            "expression": "extension.exists() != value.exists()",
            "xpath": "exists(f:extension)!=exists(f:*[starts-with(local-name(.), 'value')])",
            "source": "http://hl7.org/fhir/StructureDefinition/Extension"
          }
        ],
        "mapping": [
          {
            "identity": "rim",
            "map": "n/a"
          },
          {
            "identity": "rim",
            "map": "N/A"
          }
        ]
      },
      {
        "id": "Extension.extension:modality",
        "path": "Extension.extension",
        "sliceName": "modality",
        "short": "Additional content defined by implementations",
        "definition": "May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance  applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.",
        "comment": "There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions.  The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.",
        "alias": [
          "extensions",
          "user content"
        ],
        "min": 0,
        "max": "*",
        "base": {
          "path": "Element.extension",
          "min": 0,
          "max": "*"
        },
        "type": [
          {
            "code": "Extension",
            "profile": [
              "http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality"
            ]
          }
        ],
        "condition": [
          "ele-1"
        ],
        "constraint": [
          {
            "key": "ele-1",
            "severity": "error",
            "human": "All FHIR elements must have a @value or children",
            "expression": "hasValue() or (children().count() > id.count())",
            "xpath": "@value|f:*|h:div",
            "source": "http://hl7.org/fhir/StructureDefinition/Element"
          },
          {
            "key": "ext-1",
            "severity": "error",
            "human": "Must have either extensions or value[x], not both",
            "expression": "extension.exists() != value.exists()",
            "xpath": "exists(f:extension)!=exists(f:*[starts-with(local-name(.), 'value')])",
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        ]
      },
      {
        "id": "Extension.extension:modality.id",
        "path": "Extension.extension.id",
        "representation": [
          "xmlAttr"
        ],
        "short": "Unique id for inter-element referencing",
        "definition": "Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Element.id",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "_code": {
              "extension": [
                {
                  "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-json-type",
                  "valueString": "string"
                },
                {
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                  "valueString": "xsd:string"
                },
                {
                  "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-rdf-type",
                  "valueString": "xsd:string"
                }
              ]
            }
          }
        ],
        "mapping": [
          {
            "identity": "rim",
            "map": "n/a"
          }
        ]
      },
      {
        "id": "Extension.extension:modality.extension",
        "path": "Extension.extension.extension",
        "slicing": {
          "discriminator": [
            {
              "type": "value",
              "path": "url"
            }
          ],
          "description": "Extensions are always sliced by (at least) url",
          "rules": "open"
        },
        "short": "Additional content defined by implementations",
        "definition": "May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance  applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.",
        "comment": "There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions.  The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.",
        "alias": [
          "extensions",
          "user content"
        ],
        "min": 0,
        "max": "*",
        "base": {
          "path": "Element.extension",
          "min": 0,
          "max": "*"
        },
        "type": [
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          }
        ],
        "condition": [
          "ele-1"
        ],
        "constraint": [
          {
            "key": "ele-1",
            "severity": "error",
            "human": "All FHIR elements must have a @value or children",
            "expression": "hasValue() or (children().count() > id.count())",
            "xpath": "@value|f:*|h:div",
            "source": "http://hl7.org/fhir/StructureDefinition/Element"
          },
          {
            "key": "ext-1",
            "severity": "error",
            "human": "Must have either extensions or value[x], not both",
            "expression": "extension.exists() != value.exists()",
            "xpath": "exists(f:extension)!=exists(f:*[starts-with(local-name(.), 'value')])",
            "source": "http://hl7.org/fhir/StructureDefinition/Extension"
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        ],
        "mapping": [
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            "identity": "rim",
            "map": "n/a"
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          {
            "identity": "rim",
            "map": "N/A"
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        ]
      },
      {
        "id": "Extension.extension:modality.url",
        "path": "Extension.extension.url",
        "representation": [
          "xmlAttr"
        ],
        "short": "identifies the meaning of the extension",
        "definition": "Source of the definition for the extension code - a logical name or a 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.",
        "min": 1,
        "max": "1",
        "base": {
          "path": "Extension.url",
          "min": 1,
          "max": "1"
        },
        "type": [
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            "_code": {
              "extension": [
                {
                  "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-json-type",
                  "valueString": "string"
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                {
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                },
                {
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                  "valueString": "xsd:string"
                },
                {
                  "url": "http://hl7.org/fhir/StructureDefinition/regex",
                  "valueString": "((http|https)://([A-Za-z0-9\\\\\\.\\:\\%\\$]*\\/)*)?(Account|ActivityDefinition|AdverseEvent|AllergyIntolerance|Appointment|AppointmentResponse|AuditEvent|Basic|Binary|BiologicallyDerivedProduct|BodyStructure|Bundle|CapabilityStatement|CarePlan|CareTeam|CatalogEntry|ChargeItem|ChargeItemDefinition|Claim|ClaimResponse|ClinicalImpression|CodeSystem|Communication|CommunicationRequest|CompartmentDefinition|Composition|ConceptMap|Condition|Consent|Contract|Coverage|CoverageEligibilityRequest|CoverageEligibilityResponse|DetectedIssue|Device|DeviceDefinition|DeviceMetric|DeviceRequest|DeviceUseStatement|DiagnosticReport|DocumentManifest|DocumentReference|EffectEvidenceSynthesis|Encounter|Endpoint|EnrollmentRequest|EnrollmentResponse|EpisodeOfCare|EventDefinition|Evidence|EvidenceVariable|ExampleScenario|ExplanationOfBenefit|FamilyMemberHistory|Flag|Goal|GraphDefinition|Group|GuidanceResponse|HealthcareService|ImagingStudy|Immunization|ImmunizationEvaluation|ImmunizationRecommendation|ImplementationGuide|InsurancePlan|Invoice|Library|Linkage|List|Location|Measure|MeasureReport|Media|Medication|MedicationAdministration|MedicationDispense|MedicationKnowledge|MedicationRequest|MedicationStatement|MedicinalProduct|MedicinalProductAuthorization|MedicinalProductContraindication|MedicinalProductIndication|MedicinalProductIngredient|MedicinalProductInteraction|MedicinalProductManufactured|MedicinalProductPackaged|MedicinalProductPharmaceutical|MedicinalProductUndesirableEffect|MessageDefinition|MessageHeader|MolecularSequence|NamingSystem|NutritionOrder|Observation|ObservationDefinition|OperationDefinition|OperationOutcome|Organization|OrganizationAffiliation|Patient|PaymentNotice|PaymentReconciliation|Person|PlanDefinition|Practitioner|PractitionerRole|Procedure|Provenance|Questionnaire|QuestionnaireResponse|RelatedPerson|RequestGroup|ResearchDefinition|ResearchElementDefinition|ResearchStudy|ResearchSubject|RiskAssessment|RiskEvidenceSynthesis|Schedule|SearchParameter|ServiceRequest|Slot|Specimen|SpecimenDefinition|StructureDefinition|StructureMap|Subscription|Substance|SubstanceNucleicAcid|SubstancePolymer|SubstanceProtein|SubstanceReferenceInformation|SubstanceSourceMaterial|SubstanceSpecification|SupplyDelivery|SupplyRequest|Task|TerminologyCapabilities|TestReport|TestScript|ValueSet|VerificationResult|VisionPrescription)\\/[A-Za-z0-9\\-\\.]{1,64}(\\/_history\\/[A-Za-z0-9\\-\\.]{1,64})?"
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        ],
        "fixedUri": "http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality",
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      },
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        "path": "Extension.extension.value[x]",
        "short": "Value of extension",
        "definition": "Value of extension - must be one of a constrained set of the data types (see [Extensibility](extensibility.html) for a list).",
        "min": 0,
        "max": "1",
        "base": {
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        "type": [
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        ],
        "condition": [
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        "constraint": [
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            "key": "ele-1",
            "severity": "error",
            "human": "All FHIR elements must have a @value or children",
            "expression": "hasValue() or (children().count() > id.count())",
            "xpath": "@value|f:*|h:div",
            "source": "http://hl7.org/fhir/StructureDefinition/Element"
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          {
            "identity": "rim",
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      },
      {
        "id": "Extension.extension:modality.value[x].id",
        "path": "Extension.extension.value[x].id",
        "representation": [
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        ],
        "short": "Unique id for inter-element referencing",
        "definition": "Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.",
        "min": 0,
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        "base": {
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        "type": [
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              ]
            }
          }
        ],
        "mapping": [
          {
            "identity": "rim",
            "map": "n/a"
          }
        ]
      },
      {
        "id": "Extension.extension:modality.value[x].extension",
        "path": "Extension.extension.value[x].extension",
        "slicing": {
          "discriminator": [
            {
              "type": "value",
              "path": "url"
            }
          ],
          "description": "Extensions are always sliced by (at least) url",
          "rules": "open"
        },
        "short": "Additional content defined by implementations",
        "definition": "May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance  applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.",
        "comment": "There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions.  The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.",
        "alias": [
          "extensions",
          "user content"
        ],
        "min": 0,
        "max": "*",
        "base": {
          "path": "Element.extension",
          "min": 0,
          "max": "*"
        },
        "type": [
          {
            "code": "Extension"
          }
        ],
        "condition": [
          "ele-1"
        ],
        "constraint": [
          {
            "key": "ele-1",
            "severity": "error",
            "human": "All FHIR elements must have a @value or children",
            "expression": "hasValue() or (children().count() > id.count())",
            "xpath": "@value|f:*|h:div",
            "source": "http://hl7.org/fhir/StructureDefinition/Element"
          },
          {
            "key": "ext-1",
            "severity": "error",
            "human": "Must have either extensions or value[x], not both",
            "expression": "extension.exists() != value.exists()",
            "xpath": "exists(f:extension)!=exists(f:*[starts-with(local-name(.), 'value')])",
            "source": "http://hl7.org/fhir/StructureDefinition/Extension"
          }
        ],
        "mapping": [
          {
            "identity": "rim",
            "map": "n/a"
          },
          {
            "identity": "rim",
            "map": "N/A"
          }
        ]
      },
      {
        "id": "Extension.extension:modality.value[x].coding",
        "path": "Extension.extension.value[x].coding",
        "short": "Code defined by a terminology system",
        "definition": "A reference to a code defined by a terminology system.",
        "comment": "Codes may be defined very casually in enumerations, or code lists, up to very formal definitions such as SNOMED CT - see the HL7 v3 Core Principles for more information.  Ordering of codings is undefined and SHALL NOT be used to infer meaning. Generally, at most only one of the coding values will be labeled as UserSelected = true.",
        "requirements": "Allows for alternative encodings within a code system, and translations to other code systems.",
        "min": 0,
        "max": "*",
        "base": {
          "path": "CodeableConcept.coding",
          "min": 0,
          "max": "*"
        },
        "type": [
          {
            "code": "Coding"
          }
        ],
        "condition": [
          "ele-1"
        ],
        "constraint": [
          {
            "key": "ele-1",
            "severity": "error",
            "human": "All FHIR elements must have a @value or children",
            "expression": "hasValue() or (children().count() > id.count())",
            "xpath": "@value|f:*|h:div",
            "source": "http://hl7.org/fhir/StructureDefinition/Element"
          }
        ],
        "isSummary": true,
        "mapping": [
          {
            "identity": "rim",
            "map": "n/a"
          },
          {
            "identity": "v2",
            "map": "CE/CNE/CWE subset one of the sets of component 1-3 or 4-6"
          },
          {
            "identity": "rim",
            "map": "CV"
          },
          {
            "identity": "orim",
            "map": "fhir:Coding rdfs:subClassOf dt:CDCoding"
          },
          {
            "identity": "v2",
            "map": "C*E.1-8, C*E.10-22"
          },
          {
            "identity": "rim",
            "map": "union(., ./translation)"
          },
          {
            "identity": "orim",
            "map": "fhir:CodeableConcept.coding rdfs:subPropertyOf dt:CD.coding"
          }
        ]
      },
      {
        "id": "Extension.extension:modality.value[x].text",
        "extension": [
          {
            "url": "http://hl7.org/fhir/StructureDefinition/elementdefinition-translatable",
            "valueBoolean": true
          }
        ],
        "path": "Extension.extension.value[x].text",
        "short": "Plain text representation of the concept",
        "definition": "A human language representation of the concept as seen/selected/uttered by the user who entered the data and/or which represents the intended meaning of the user.",
        "comment": "Very often the text is the same as a displayName of one of the codings.",
        "requirements": "The codes from the terminologies do not always capture the correct meaning with all the nuances of the human using them, or sometimes there is no appropriate code at all. In these cases, the text is used to capture the full meaning of the source.",
        "min": 1,
        "max": "1",
        "base": {
          "path": "CodeableConcept.text",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "string"
          }
        ],
        "condition": [
          "ele-1"
        ],
        "constraint": [
          {
            "key": "ele-1",
            "severity": "error",
            "human": "All FHIR elements must have a @value or children",
            "expression": "hasValue() or (children().count() > id.count())",
            "xpath": "@value|f:*|h:div",
            "source": "http://hl7.org/fhir/StructureDefinition/Element"
          }
        ],
        "isSummary": true,
        "mapping": [
          {
            "identity": "rim",
            "map": "n/a"
          },
          {
            "identity": "v2",
            "map": "C*E.9. But note many systems use C*E.2 for this"
          },
          {
            "identity": "rim",
            "map": "./originalText[mediaType/code=\"text/plain\"]/data"
          },
          {
            "identity": "orim",
            "map": "fhir:CodeableConcept.text rdfs:subPropertyOf dt:CD.originalText"
          }
        ]
      },
      {
        "id": "Extension.url",
        "path": "Extension.url",
        "representation": [
          "xmlAttr"
        ],
        "short": "identifies the meaning of the extension",
        "definition": "Source of the definition for the extension code - a logical name or a 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.",
        "min": 1,
        "max": "1",
        "base": {
          "path": "Extension.url",
          "min": 1,
          "max": "1"
        },
        "type": [
          {
            "_code": {
              "extension": [
                {
                  "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-json-type",
                  "valueString": "string"
                },
                {
                  "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-xml-type",
                  "valueString": "xsd:string"
                },
                {
                  "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-rdf-type",
                  "valueString": "xsd:string"
                },
                {
                  "url": "http://hl7.org/fhir/StructureDefinition/regex",
                  "valueString": "((http|https)://([A-Za-z0-9\\\\\\.\\:\\%\\$]*\\/)*)?(Account|ActivityDefinition|AdverseEvent|AllergyIntolerance|Appointment|AppointmentResponse|AuditEvent|Basic|Binary|BiologicallyDerivedProduct|BodyStructure|Bundle|CapabilityStatement|CarePlan|CareTeam|CatalogEntry|ChargeItem|ChargeItemDefinition|Claim|ClaimResponse|ClinicalImpression|CodeSystem|Communication|CommunicationRequest|CompartmentDefinition|Composition|ConceptMap|Condition|Consent|Contract|Coverage|CoverageEligibilityRequest|CoverageEligibilityResponse|DetectedIssue|Device|DeviceDefinition|DeviceMetric|DeviceRequest|DeviceUseStatement|DiagnosticReport|DocumentManifest|DocumentReference|EffectEvidenceSynthesis|Encounter|Endpoint|EnrollmentRequest|EnrollmentResponse|EpisodeOfCare|EventDefinition|Evidence|EvidenceVariable|ExampleScenario|ExplanationOfBenefit|FamilyMemberHistory|Flag|Goal|GraphDefinition|Group|GuidanceResponse|HealthcareService|ImagingStudy|Immunization|ImmunizationEvaluation|ImmunizationRecommendation|ImplementationGuide|InsurancePlan|Invoice|Library|Linkage|List|Location|Measure|MeasureReport|Media|Medication|MedicationAdministration|MedicationDispense|MedicationKnowledge|MedicationRequest|MedicationStatement|MedicinalProduct|MedicinalProductAuthorization|MedicinalProductContraindication|MedicinalProductIndication|MedicinalProductIngredient|MedicinalProductInteraction|MedicinalProductManufactured|MedicinalProductPackaged|MedicinalProductPharmaceutical|MedicinalProductUndesirableEffect|MessageDefinition|MessageHeader|MolecularSequence|NamingSystem|NutritionOrder|Observation|ObservationDefinition|OperationDefinition|OperationOutcome|Organization|OrganizationAffiliation|Patient|PaymentNotice|PaymentReconciliation|Person|PlanDefinition|Practitioner|PractitionerRole|Procedure|Provenance|Questionnaire|QuestionnaireResponse|RelatedPerson|RequestGroup|ResearchDefinition|ResearchElementDefinition|ResearchStudy|ResearchSubject|RiskAssessment|RiskEvidenceSynthesis|Schedule|SearchParameter|ServiceRequest|Slot|Specimen|SpecimenDefinition|StructureDefinition|StructureMap|Subscription|Substance|SubstanceNucleicAcid|SubstancePolymer|SubstanceProtein|SubstanceReferenceInformation|SubstanceSourceMaterial|SubstanceSpecification|SupplyDelivery|SupplyRequest|Task|TerminologyCapabilities|TestReport|TestScript|ValueSet|VerificationResult|VisionPrescription)\\/[A-Za-z0-9\\-\\.]{1,64}(\\/_history\\/[A-Za-z0-9\\-\\.]{1,64})?"
                }
              ]
            }
          }
        ],
        "fixedUri": "http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality-and-technique",
        "mapping": [
          {
            "identity": "rim",
            "map": "N/A"
          }
        ]
      },
      {
        "id": "Extension.value[x]",
        "path": "Extension.value[x]",
        "short": "Value of extension",
        "definition": "Value of extension - must be one of a constrained set of the data types (see [Extensibility](extensibility.html) for a list).",
        "min": 0,
        "max": "0",
        "base": {
          "path": "Extension.value[x]",
          "min": 0,
          "max": "1"
        },
        "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"
          }
        ],
        "condition": [
          "ele-1"
        ],
        "constraint": [
          {
            "key": "ele-1",
            "severity": "error",
            "human": "All FHIR elements must have a @value or children",
            "expression": "hasValue() or (children().count() > id.count())",
            "xpath": "@value|f:*|h:div",
            "source": "http://hl7.org/fhir/StructureDefinition/Element"
          }
        ],
        "mapping": [
          {
            "identity": "rim",
            "map": "n/a"
          },
          {
            "identity": "rim",
            "map": "N/A"
          }
        ]
      }
    ]
  },
  "differential": {
    "element": [
      {
        "id": "Extension",
        "path": "Extension",
        "short": "Radiotherapy Modality And Technique Extension",
        "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.",
        "constraint": [
          {
            "key": "TechniquesForNeutronBeamModality",
            "severity": "error",
            "human": "Allowed Techniques for Neutron Beam Modality",
            "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-technique').exists() and\n         extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').value.exists(coding.system = 'http://snomed.info/sct' and coding.code = '80347004')\n   implies\n         extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').value.exists( (\n          coding.code = '169317000' or coding.code = '1162782007'))",
            "source": "http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality-and-technique"
          },
          {
            "key": "TechniquesForPhotonBeamModality",
            "severity": "error",
            "human": "Allowed Techniques for Photon Beam Modality",
            "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-technique').exists() and\n         extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').value.exists(coding.system = 'http://snomed.info/sct' and coding.code = '1156506007')\n   implies\n         extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').value.exists((\n          coding.code = '441799006' or coding.code = '1156530009' or\n          coding.code = '1162782007' or coding.code = '1156526006' or\n          coding.code = '168524008' or coding.code = '1156530009'))",
            "source": "http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality-and-technique"
          },
          {
            "key": "TechniquesForElectronBeamModality",
            "severity": "error",
            "human": "Allowed Techniques for Electron Beam Modality",
            "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-technique').exists() and\n         extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').value.exists(coding.system = 'http://snomed.info/sct' and coding.code = '45643008')\n   implies\n         extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').value.exists( (\n          coding.code = '1162782007' or coding.code = '1156526006' or coding.code = '168524008'))",
            "source": "http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality-and-technique"
          },
          {
            "key": "TechniquesForCarbonIonBeamModality",
            "severity": "error",
            "human": "Allowed Techniques for Carbon Ion Beam Modality",
            "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-technique').exists() and\n         extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').value.exists(coding.system = 'http://snomed.info/sct' and coding.code = '1156505006')\n   implies\n         extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').value.exists( (\n          coding.code = '1156529004' or coding.code = '1156528007' or coding.code='USCRS-33517'))",
            "source": "http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality-and-technique"
          },
          {
            "key": "TechniquesForProtonBeamModality",
            "severity": "error",
            "human": "Allowed Techniques for Proton Beam Modality",
            "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-technique').exists() and\n         extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').value.exists(coding.system = 'http://snomed.info/sct' and coding.code = '10611004')\n   implies\n         extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').value.exists( (\n          coding.code = '1156529004' or coding.code = '1156528007' or coding.code = 'USCRS-33517'))",
            "source": "http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality-and-technique"
          },
          {
            "key": "TechniquesForInternalRadiotherapyPermanentSeeds",
            "severity": "error",
            "human": "Allowed Techniques for Internal Radiotherapy - Permanent Seeds",
            "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-technique').exists() and\n         extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').value.exists(coding.system = 'http://snomed.info/sct' and coding.code = '169359004')\n   implies\n         extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').value.exists( (\n          coding.code = '113120007'))",
            "source": "http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality-and-technique"
          },
          {
            "key": "TechniquesForLowDoseRateUsingTempRadSource",
            "severity": "error",
            "human": "Allowed Techniques for Low Dose Rate Using Temp Radiation Source",
            "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-technique').exists() and\n         extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').value.exists(coding.system = 'http://snomed.info/sct' and coding.code = '1156708005')\n   implies\n         extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').value.exists(coding.system = 'http://snomed.info/sct' and (\n          coding.code = '384692006' or coding.code = '113120007' or coding.code = '14473006'))",
            "source": "http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality-and-technique"
          },
          {
            "key": "TechniquesForPulsedDoseRate",
            "severity": "error",
            "human": "Allowed Techniques for Pulsed Dose Rate",
            "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-technique').exists() and\n         extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').value.exists(coding.system = 'http://snomed.info/sct' and coding.code = '1156384006')\n   implies\n         extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').value.exists(coding.system = 'http://snomed.info/sct' and (\n          coding.code = '384692006' or coding.code = '113120007'))",
            "source": "http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality-and-technique"
          },
          {
            "key": "TechniquesForHighDoseRate",
            "severity": "error",
            "human": "Allowed Techniques for High Dose Rate",
            "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-technique').exists() and\n         extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').value.exists(coding.system = 'http://snomed.info/sct' and coding.code = '394902000')\n   implies\n         extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').value.exists(coding.system = 'http://snomed.info/sct' and (\n          coding.code = '384692006' or coding.code = '1156382005' or coding.code = '113120007' or coding.code = '1156383000' or coding.code = '384691004' or coding.code = '168524008' or coding.code = '14473006'))",
            "source": "http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality-and-technique"
          },
          {
            "key": "TechniquesForHighDoseRateElectronic",
            "severity": "error",
            "human": "Allowed Techniques for High Dose Rate Electronic",
            "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-technique').exists() and\n         extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').value.exists(coding.system = 'http://snomed.info/sct' and coding.code = '438629002')\n   implies\n         extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').value.exists(coding.system = 'http://snomed.info/sct' and (\n          coding.code = '384692006' or coding.code = '1156382005' or coding.code = '113120007' or coding.code = '384691004' or coding.code = '168524008' or coding.code = '14473006'))",
            "source": "http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality-and-technique"
          },
          {
            "key": "TechniquesForRadioPharmaceutical",
            "severity": "error",
            "human": "Allowed Techniques for Radiopharmaceutical",
            "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-technique').exists() and\n         extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality').value.exists( coding.code = '440252007')\n   implies\n         extension.where(url = 'http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-technique').value.exists( (\n          coding.code = '16560241000119104' or coding.code = '1156383000' or coding.code = '384692006' or coding.code = '113120007'))",
            "source": "http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality-and-technique"
          }
        ]
      },
      {
        "id": "Extension.extension",
        "path": "Extension.extension",
        "slicing": {
          "discriminator": [
            {
              "type": "value",
              "path": "url"
            }
          ],
          "rules": "open"
        },
        "min": 0
      },
      {
        "id": "Extension.extension:modality",
        "path": "Extension.extension",
        "sliceName": "modality",
        "min": 0,
        "type": [
          {
            "code": "Extension",
            "profile": [
              "http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality"
            ]
          }
        ],
        "mustSupport": true
      },
      {
        "id": "Extension.extension:modality.url",
        "path": "Extension.extension.url",
        "fixedUri": "http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality"
      },
      {
        "id": "Extension.extension:modality.value[x]",
        "path": "Extension.extension.value[x]",
        "type": [
          {
            "code": "CodeableConcept"
          }
        ]
      },
      {
        "id": "Extension.extension:modality.value[x].text",
        "path": "Extension.extension.value[x].text",
        "min": 1
      },
      {
        "id": "Extension.url",
        "path": "Extension.url",
        "fixedUri": "http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-modality-and-technique"
      },
      {
        "id": "Extension.value[x]",
        "path": "Extension.value[x]",
        "max": "0"
      }
    ]
  }
}