<StructureDefinition xmlns="http://hl7.org/fhir">
  <id value="HLDInformationExtension" />
  <url value="https://fhir.simplifier.net/sample-test/StructureDefinition/HLDInformationExtension" />
  <version value="1.0.0" />
  <name value="HLDInformationExtension" />
  <status value="draft" />
  <experimental value="true" />
  <date value="2024-11-04" />
  <description value="An extension to capture HLD information including lot number, open date, and serial number." />
  <fhirVersion value="5.0.0" />
  <kind value="complex-type" />
  <abstract value="false" />
  <context>
    <type value="element" />
    <expression value="Observation" />
  </context>
  <type value="Extension" />
  <baseDefinition value="http://hl7.org/fhir/StructureDefinition/Extension" />
  <derivation value="constraint" />
  <snapshot>
    <element id="Extension">
      <path value="Extension" />
      <short value="HLD information" />
      <definition value="An extension to capture details about HLD used in observations." />
      <min value="0" />
      <max value="*" />
      <type>
        <code value="Extension" />
      </type>
    </element>
    <element id="Extension.extension">
      <path value="Extension.extension" />
      <sliceName value="lotNumber" />
      <short value="HLD lot number" />
      <definition value="The lot number of the HLD." />
      <min value="0" />
      <max value="1" />
      <type>
        <code value="Extension" />
      </type>
    </element>
    <element id="Extension.extension.valueString">
      <path value="Extension.extension.valueString" />
      <short value="Lot number value" />
      <definition value="The string value representing the HLD lot number." />
      <min value="1" />
      <max value="1" />
      <type>
        <code value="string" />
      </type>
    </element>
    <element id="Extension.extension">
      <path value="Extension.extension" />
      <sliceName value="openDate" />
      <short value="HLD open date" />
      <definition value="The date the HLD was opened." />
      <min value="0" />
      <max value="1" />
      <type>
        <code value="Extension" />
      </type>
    </element>
    <element id="Extension.extension.valueString">
      <path value="Extension.extension.valueString" />
      <short value="Open date value" />
      <definition value="The string value representing the HLD open date." />
      <min value="1" />
      <max value="1" />
      <type>
        <code value="string" />
      </type>
    </element>
    <element id="Extension.extension">
      <path value="Extension.extension" />
      <sliceName value="serialNumber" />
      <short value="HLD serial number" />
      <definition value="The serial number of the HLD." />
      <min value="0" />
      <max value="1" />
      <type>
        <code value="Extension" />
      </type>
    </element>
    <element id="Extension.extension.valueString">
      <path value="Extension.extension.valueString" />
      <short value="Serial number value" />
      <definition value="The string value representing the HLD serial number." />
      <min value="1" />
      <max value="1" />
      <type>
        <code value="string" />
      </type>
    </element>
  </snapshot>
</StructureDefinition>