{
  "resourceType": "StructureDefinition",
  "url": "https://Ex2.org/fhir/StructureDefinition/Ex2Patient",
  "name": "Ex2Patient",
  "status": "draft",
  "description": "Patient profile for Exercise 2",
  "fhirVersion": "4.0.1",
  "kind": "resource",
  "abstract": false,
  "type": "Patient",
  "baseDefinition": "http://hl7.org/fhir/StructureDefinition/Patient",
  "derivation": "constraint",
  "differential": {
    "element": [
      {
        "id": "Patient",
        "path": "Patient",
        "definition": "Patient profile for Exercise 2"
      },
      {
        "id": "Patient.identifier",
        "path": "Patient.identifier",
        "slicing": {
          "discriminator": [
            {
              "type": "value",
              "path": "system"
            }
          ],
          "rules": "open"
        },
        "min": 1,
        "max": "1",
        "mustSupport": true
      },
      {
        "id": "Patient.identifier:NHSNumber",
        "path": "Patient.identifier",
        "sliceName": "NHSNumber",
        "max": "1"
      },
      {
        "id": "Patient.identifier:NHSNumber.system",
        "path": "Patient.identifier.system",
        "min": 1,
        "fixedUri": "https://fhir.nhs.uk/Id/nhs-number"
      },
      {
        "id": "Patient.identifier:NHSNumber.value",
        "path": "Patient.identifier.value",
        "min": 1
      },
      {
        "id": "Patient.identifier:BCU_CRN",
        "path": "Patient.identifier",
        "sliceName": "BCU_CRN",
        "min": 1,
        "max": "1"
      },
      {
        "id": "Patient.identifier:BCU_CRN.system",
        "path": "Patient.identifier.system",
        "min": 1,
        "fixedUri": "https://fhir.bcuhb.nhs.wales/Id/central-pas-identifier"
      },
      {
        "id": "Patient.identifier:BCU_CRN.value",
        "path": "Patient.identifier.value",
        "min": 1
      },
      {
        "id": "Patient.name",
        "path": "Patient.name",
        "min": 1,
        "type": [
          {
            "code": "HumanName",
            "profile": [
              "https://Ex4.org/fhir/StructureDefinition/ExHumanName"
            ]
          }
        ],
        "mustSupport": true
      },
      {
        "id": "Patient.gender",
        "path": "Patient.gender",
        "mustSupport": true
      },
      {
        "id": "Patient.birthDate",
        "path": "Patient.birthDate",
        "min": 1,
        "mustSupport": true
      },
      {
        "id": "Patient.address",
        "path": "Patient.address",
        "constraint": [
          {
            "key": "GarethsAddressConstraint",
            "severity": "error",
            "human": "Must be completed",
            "expression": "(use = 'temp') implies period.exists()"
          }
        ]
      },
      {
        "id": "Patient.address.use",
        "path": "Patient.address.use",
        "condition": [
          "GarethsAddressConstraint"
        ]
      },
      {
        "id": "Patient.address.period",
        "path": "Patient.address.period",
        "condition": [
          "GarethsAddressConstraint"
        ]
      }
    ]
  }
}