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

  <!--  A very simple example to demonstrate using a string value and Observation to represent a physical characteristic  -->
<Observation xmlns="http://hl7.org/fhir">
  <id value="eye-color"/>
  <status value="final"/>
  <code>
    <text value="eye color"/>
  </code>
  <subject>
    <reference value="Patient/example"/>
  </subject>
  <effectiveDateTime value="2016-05-18"/>
  <valueString value="blue"/>
</Observation>