An example of capturing 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 the focus.

{
  "resourceType" : "Observation",
  "id" : "trachcare",
  "status" : "final",
  "category" : [{
    "coding" : [{
      "system" : "http://terminology.hl7.org/CodeSystem/observation-category",
      "code" : "exam",
      "display" : "Exam"
    }],
    "text" : "Exam"
  }],
  "code" : {
    "coding" : [{
      "system" : "http://snomed.info/sct",
      "code" : "410211008",
      "display" : "Tracheostomy care assessment (procedure)"
    }]
  },
  "subject" : {
    "reference" : "Patient/infant"
  },
  "focus" : [{
    "reference" : "Patient/infant-mom"
  }],
  "effectiveDateTime" : "2018-03-11T16:07:54+00:00",
  "valueString" : "Mother is trained to change her child's tracheostomy tube"
}