{
  "description": null,
  "_filename": "Extension-DM-ControlledDrug.StructureDefinition.json",
  "package_name": "uk.nhsdigital.r4",
  "date": null,
  "derivation": "constraint",
  "publisher": null,
  "fhirVersion": "4.0.1",
  "name": "ExtensionDMControlledDrug",
  "mapping": [ {
    "uri": "http://hl7.org/v3",
    "name": "RIM Mapping",
    "identity": "rim"
  } ],
  "abstract": false,
  "type": "Extension",
  "experimental": null,
  "resourceType": "StructureDefinition",
  "title": null,
  "package_version": "2.9.0",
  "status": "draft",
  "id": "68245af4-72ad-4e12-bc58-6d9b1c8c4911",
  "kind": "complex-type",
  "url": "https://fhir.nhs.uk/StructureDefinition/Extension-DM-ControlledDrug",
  "context": [ {
    "type": "element",
    "expression": "MedicationRequest"
  } ],
  "version": null,
  "differential": {
    "element": [ {
      "id": "Extension",
      "path": "Extension",
      "constraint": [ {
        "key": "eps-cd1",
        "human": "Extension(controlledDrug) - For schedule 2 or 3 Controlled Drugs, the quantity must be expressed in words",
        "severity": "error",
        "expression": "(((extension('schedule').value.code='CD2' and extension('quantityWords').exists()) or (extension('schedule').value.code='CD3' and extension('quantityWords').exists()) or (extension('schedule').value.code != 'CD2' and extension('schedule').value.code != 'CD3')) and extension('scheduled').exists()) or (extension('scheduled').exists().not())"
      } ]
    }, {
      "id": "Extension.extension",
      "min": 0,
      "path": "Extension.extension",
      "slicing": {
        "rules": "open",
        "discriminator": [ {
          "path": "url",
          "type": "value"
        } ]
      }
    }, {
      "id": "Extension.extension:quantityWords",
      "max": "1",
      "min": 0,
      "path": "Extension.extension",
      "sliceName": "quantityWords"
    }, {
      "id": "Extension.extension:quantityWords.url",
      "path": "Extension.extension.url",
      "fixedUri": "quantityWords"
    }, {
      "id": "Extension.extension:quantityWords.value[x]",
      "min": 1,
      "path": "Extension.extension.value[x]",
      "type": [ {
        "code": "string"
      } ]
    }, {
      "id": "Extension.extension:schedule",
      "max": "1",
      "min": 0,
      "path": "Extension.extension",
      "binding": {
        "strength": "required",
        "valueSet": "https://fhir.nhs.uk/ValueSet/DM-medicationrequest-controlled-drug"
      },
      "sliceName": "schedule"
    }, {
      "id": "Extension.extension:schedule.url",
      "path": "Extension.extension.url",
      "fixedUri": "schedule"
    }, {
      "id": "Extension.extension:schedule.value[x]",
      "min": 1,
      "path": "Extension.extension.value[x]",
      "type": [ {
        "code": "Coding"
      } ]
    }, {
      "id": "Extension.extension:schedule.value[x].system",
      "min": 1,
      "path": "Extension.extension.value[x].system"
    }, {
      "id": "Extension.extension:schedule.value[x].code",
      "min": 1,
      "path": "Extension.extension.value[x].code"
    }, {
      "id": "Extension.extension:schedule.value[x].display",
      "min": 1,
      "path": "Extension.extension.value[x].display"
    }, {
      "id": "Extension.url",
      "path": "Extension.url",
      "fixedUri": "https://fhir.nhs.uk/StructureDefinition/Extension-DM-ControlledDrug"
    }, {
      "id": "Extension.value[x]",
      "max": "0",
      "path": "Extension.value[x]"
    } ]
  },
  "baseDefinition": "http://hl7.org/fhir/StructureDefinition/Extension"
}