{
  "resourceType": "StructureDefinition",
  "id": "performer",
  "url": "http://ihis.sg/extension/performer",
  "name": "Performer",
  "status": "active",
  "date": "2019-10-31T22:29:23+00:00",
  "description": "Performer",
  "fhirVersion": "4.3.0",
  "kind": "complex-type",
  "abstract": false,
  "context": [
    {
      "type": "element",
      "expression": "CarePlan"
    }
  ],
  "type": "Extension",
  "baseDefinition": "http://hl7.org/fhir/StructureDefinition/Extension",
  "derivation": "constraint",
  "differential": {
    "element": [
      {
        "id": "Extension",
        "path": "Extension",
        "max": "1",
        "isModifier": false
      },
      {
        "id": "Extension.id",
        "path": "Extension.id",
        "max": "0"
      },
      {
        "id": "Extension.url",
        "path": "Extension.url",
        "fixedUri": "http://ihis.sg/extension/performer"
      },
      {
        "id": "Extension.value[x]",
        "path": "Extension.value[x]",
        "type": [
          {
            "code": "Identifier"
          }
        ]
      },
      {
        "id": "Extension.value[x].id",
        "path": "Extension.value[x].id",
        "max": "0"
      },
      {
        "id": "Extension.value[x].use",
        "path": "Extension.value[x].use",
        "max": "0"
      },
      {
        "id": "Extension.value[x].type",
        "path": "Extension.value[x].type",
        "max": "0"
      },
      {
        "id": "Extension.value[x].system",
        "path": "Extension.value[x].system",
        "min": 1,
        "fixedUri": "http://ihis.sg/identifier/prs"
      },
      {
        "id": "Extension.value[x].value",
        "path": "Extension.value[x].value",
        "min": 1,
        "constraint": [
          {
            "key": "performer-value-validation",
            "severity": "error",
            "human": "Performer value should not be empty",
            "expression": "$this.length() > 0"
          }
        ]
      },
      {
        "id": "Extension.value[x].period",
        "path": "Extension.value[x].period",
        "max": "0"
      },
      {
        "id": "Extension.value[x].assigner",
        "path": "Extension.value[x].assigner",
        "max": "0"
      }
    ]
  }
}