Herd of 2500 breeding sows (id = "herd1")

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

<!--  
 An example of a herd used in the subject screening observation for Mycoplasmal
 Pneumonia in Pigs
(Enzootic pneumonia).  Many thanks to Veterinary Diagnostic Laboratory Iowa State
 University for the data.  --><Group xmlns="http://hl7.org/fhir">
  <id value="herd1"/> 
  <!--   added this extension to reference the owner (client) of the herd   -->
  <extension url="http://example.org/fhir/StructureDefinition/owner">
    <valueReference> 
      <reference value="RelatedPerson/peter"/> 
      <display value="Peter Chalmers"/> 
    </valueReference> 
  </extension> 
  <!--   diagnostic lab's identifier   -->
  <identifier> 
    <system value="https://vetmed.iastate.edu/vdl"/> 
    <value value="20171120-1234"/> 
  </identifier> 
  <name value="Breeding herd"/> 
  <status value="active"/> 
  <type value="animal"/> 
  <membership value="enumerated"/> 
  <!--   describes a bunch of female breeding sows  added a translation from US APHIS
   codes to SNOMED CT  -->
  <code> 
    <coding> 
      <system value="http://snomed.info/sct"/> 
      <code value="388393002"/> 
      <display value="Genus Sus (organism)"/> 
    </coding> 
    <coding> 
      <system value="https://www.aphis.usda.gov"/> 
      <code value="POR"/> 
      <display value="porcine"/> 
    </coding> 
    <text value="Porcine"/> 
  </code> 
  <quantity value="2500"/> 
  <!--   the share the common charasteristic of being sows   -->
  <characteristic> 
    <code> 
      <text value="gender"/> 
    </code> 
    <valueCodeableConcept> 
      <text value="female"/> 
    </valueCodeableConcept> 
    <!--   required element - false means they are all sows   -->
    <exclude value="false"/> 
  </characteristic> 
</Group>