{
  "resourceType": "StructureDefinition",
  "id": "observation-focusCode",
  "extension": [
    {
      "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-wg",
      "valueCode": "oo"
    },
    {
      "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm",
      "valueInteger": 1
    }
  ],
  "url": "http://hl7.org/fhir/StructureDefinition/observation-focusCode",
  "version": "4.6.0",
  "name": "focusCode",
  "title": "Focal Subject Code",
  "status": "draft",
  "date": "2015-03-02",
  "publisher": "Health Level Seven, Inc. - OO WG",
  "contact": [
    {
      "telecom": [
        {
          "system": "url",
          "value": "http://hl7.org/special/committees/orders"
        }
      ]
    }
  ],
  "description": "A code representing the  focus of an observation when the focus is not the patient of record.  In other words, the focus of the observation is different from `Observation.subject`.   An example use case would be using the *Observation* resource to capture whether the mother is trained to change her child's tracheostomy tube.  In this example, the child is the patient of record and the mother is focal subject referenced using this extension.  Other example focal subjects include spouses, related persons, feti, or  donors.",
  "fhirVersion": "4.6.0",
  "mapping": [
    {
      "identity": "rim",
      "uri": "http://hl7.org/v3",
      "name": "RIM Mapping"
    }
  ],
  "kind": "complex-type",
  "abstract": false,
  "context": [
    {
      "type": "element",
      "expression": "Observation"
    }
  ],
  "type": "Extension",
  "baseDefinition": "http://hl7.org/fhir/StructureDefinition/Extension",
  "derivation": "constraint",
  "differential": {
    "element": [
      {
        "id": "Extension",
        "path": "Extension",
        "short": "Focus Code",
        "definition": "A code representing the  focus of an observation when the focus is not the patient of record.  In other words, the focus of the observation is different from `Observation.subject`.   An example use case would be using the *Observation* resource to capture whether the mother is trained to change her child's tracheostomy tube.  In this example, the child is the patient of record and the mother is focal subject referenced using this extension.  Other example focal subjects include spouses, related persons, feti, or  donors.",
        "comment": "Use Observation.specimen element to describe the specimen.  Only used if not implicit in code found in Observation.code.",
        "min": 0,
        "max": "1"
      },
      {
        "id": "Extension.extension",
        "path": "Extension.extension",
        "max": "0"
      },
      {
        "id": "Extension.url",
        "path": "Extension.url",
        "fixedUri": "http://hl7.org/fhir/StructureDefinition/observation-focusCode"
      },
      {
        "id": "Extension.value[x]",
        "path": "Extension.value[x]",
        "min": 1,
        "type": [
          {
            "code": "CodeableConcept"
          }
        ],
        "binding": {
          "extension": [
            {
              "url": "http://hl7.org/fhir/build/StructureDefinition/definition",
              "valueString": "Codes for observation targets.  Derived from both HL7 v3 and SNOMED CT code systems."
            },
            {
              "url": "http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName",
              "valueString": "FocusCode"
            }
          ],
          "strength": "example",
          "description": "Derived from both HL7 v3 and SNOMED CT code systems",
          "valueSet": "http://hl7.org/fhir/ValueSet/focal-subject"
        }
      }
    ]
  }
}