<?xml version="1.0" encoding="UTF-8"?><Observation xmlns="http://hl7.org/fhir">
  <id value="head-circumference"/>
  <meta>
    <profile value="http://hl7.org/fhir/StructureDefinition/vitalsigns"/>
  
    <security>
      <system value="http://terminology.hl7.org/CodeSystem/v3-ActReason"/>
      <code value="HTEST"/>
      <display value="test health data"/>
    </security>
  </meta>
  <status value="final"/>
  <category>
    <coding>
      <system value="http://terminology.hl7.org/CodeSystem/observation-category"/>
      <code value="vital-signs"/>
      <display value="Vital Signs"/>
    </coding>
    <text value="Vital Signs"/>
  </category>
  <code>
    <coding>
      <system value="http://loinc.org"/>
      <code value="9843-4"/>
      <display value="Head Occipital-frontal circumference"/>
    </coding>
    <text value="Head Circumference"/>
  </code>
  <subject>
    <reference value="Patient/example"/>
  </subject>
  <effectiveDateTime value="1999-07-02"/>
  <valueQuantity>
    <value value="51.2"/>
    <unit value="cm"/>
    <system value="http://unitsofmeasure.org"/>
    <code value="cm"/>
  </valueQuantity>
</Observation>