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. (id = "trachcare")

<?xml version="1.0" encoding="UTF-8"?>

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