Example of observationdefinition for Creatine Kinase panel with multiple components (id = "example-ck-panel")

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

<ObservationDefinition xmlns="http://hl7.org/fhir">
  <id value="example-ck-panel"/> 
  <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-wg">
    <valueCode value="oo"/> 
  </extension> 
  <status value="active"/> 
  <publisher value="HL7 International / Orders and Observations"/> 
  <contact> 
    <telecom> 
      <system value="url"/> 
      <value value="http://www.hl7.org/Special/committees/orders"/> 
    </telecom> 
  </contact> 
  <category> 
    <coding> 
      <system value="http://terminology.hl7.org/CodeSystem/observation-category"/> 
      <code value="laboratory"/> 
      <display value="Laboratory"/> 
    </coding> 
  </category> 
  <code> 
    <coding> 
      <system value="http://loinc.org"/> 
      <code value="32673-6"/> 
      <display value="Creatine kinase.MB [Enzymatic activity/volume] in Serum or Plasma"/> 
    </coding> 
    <text value="Creatine Kinase Panel"/> 
  </code> 
  <permittedDataType value="Quantity"/> 
  <multipleResultsAllowed value="true"/> 
  <!--   <method>
    <coding>
      <system value="http://snomed.info/sct"/>
      <code value="258066000"/>
      <display value="Enzymatic measurement"/>
    </coding>
  </method>   -->
  <preferredReportName value="Creatine Kinase, MB and Relative Percent"/> 
  <!--   Panel-level qualified value for cardiac assessment   -->
  <qualifiedValue> 
    <condition/>  
    <context> 
      <coding> 
        <system value="http://terminology.hl7.org/CodeSystem/referencerange-meaning"/> 
        <code value="normal"/> 
        <display value="Normal Range"/> 
      </coding> 
    </context> 
    <rangeCategory value="reference"/> 
    <validCodedValueSet/>  
  </qualifiedValue> 
  <!--   Component 1: Total Creatine Kinase   -->
  <component> 
    <code> 
      <coding> 
        <system value="http://loinc.org"/> 
        <code value="2157-6"/> 
        <display value="Creatine kinase [Enzymatic activity/volume] in Serum or Plasma"/> 
      </coding> 
      <text value="Creatine Kinase, Total"/> 
    </code> 
    <permittedDataType value="Quantity"/> 
    <permittedUnit> 
      <system value="http://unitsofmeasure.org"/> 
      <code value="U/L"/> 
      <display value="U/L"/> 
    </permittedUnit> 
    <qualifiedValue> 
      <condition/>  
      <context> 
        <coding> 
          <system value="http://terminology.hl7.org/CodeSystem/referencerange-meaning"/> 
          <code value="normal"/> 
          <display value="Normal Range"/> 
        </coding> 
      </context> 
      <rangeCategory value="reference"/> 
      <range> 
        <low> 
          <value value="39"/> 
          <unit value="U/L"/> 
          <system value="http://unitsofmeasure.org"/> 
          <code value="U/L"/> 
        </low> 
        <high> 
          <value value="308"/> 
          <unit value="U/L"/> 
          <system value="http://unitsofmeasure.org"/> 
          <code value="U/L"/> 
        </high> 
      </range> 
    </qualifiedValue> 
  </component> 
  <!--   Component 2: CK-MB Isoenzyme   -->
  <component> 
    <code> 
      <coding> 
        <system value="http://loinc.org"/> 
        <code value="13969-1"/> 
        <display value="Creatine kinase.MB [Mass/volume] in Serum or Plasma"/> 
      </coding> 
      <text value="Creatine Kinase, Isoenzyme MB"/> 
    </code> 
    <permittedDataType value="Quantity"/> 
    <permittedUnit> 
      <system value="http://unitsofmeasure.org"/> 
      <code value="ng/mL"/> 
      <display value="ng/mL"/> 
    </permittedUnit> 
    <qualifiedValue> 
      <condition/>  
      <context> 
        <coding> 
          <system value="http://terminology.hl7.org/CodeSystem/referencerange-meaning"/> 
          <code value="normal"/> 
          <display value="Normal Range"/> 
        </coding> 
      </context> 
      <rangeCategory value="reference"/> 
      <range> 
        <low> 
          <value value="0.0"/> 
          <unit value="ng/mL"/> 
          <system value="http://unitsofmeasure.org"/> 
          <code value="ng/mL"/> 
        </low> 
        <high> 
          <value value="7.7"/> 
          <unit value="ng/mL"/> 
          <system value="http://unitsofmeasure.org"/> 
          <code value="ng/mL"/> 
        </high> 
      </range> 
    </qualifiedValue> 
  </component> 
  <!--   Component 3: CK-MB Relative Percent   -->
  <component> 
    <code> 
      <coding> 
        <system value="http://loinc.org"/> 
        <code value="20569-0"/> 
        <display value="Creatine kinase.MB/Creatine kinase.total in Serum or Plasma"/> 
      </coding> 
      <text value="CK-MB Relative Percent"/> 
    </code> 
    <permittedDataType value="Quantity"/> 
    <permittedUnit> 
      <system value="http://unitsofmeasure.org"/> 
      <code value="%"/> 
      <display value="%"/> 
    </permittedUnit> 
    <qualifiedValue> 
      <condition/>  
      <context> 
        <coding> 
          <system value="http://terminology.hl7.org/CodeSystem/referencerange-meaning"/> 
          <code value="normal"/> 
          <display value="Normal Range"/> 
        </coding> 
      </context> 
      <rangeCategory value="reference"/> 
      <range> 
        <low> 
          <value value="0.0"/> 
          <unit value="%"/> 
          <system value="http://unitsofmeasure.org"/> 
          <code value="%"/> 
        </low> 
        <high> 
          <value value="5.0"/> 
          <unit value="%"/> 
          <system value="http://unitsofmeasure.org"/> 
          <code value="%"/> 
        </high> 
      </range> 
    </qualifiedValue> 
  </component> 
</ObservationDefinition>