<StructureDefinition xmlns="http://hl7.org/fhir">
  <id value="KBV-PR-ERP-Medication-Compounding" />
  <url value="https://fhir.kbv.de/StructureDefinition/KBV_PR_ERP_Medication_Compounding" />
  <version value="1.4.1" />
  <name value="KBV_PR_ERP_Medication_Compounding" />
  <status value="active" />
  <date value="2026-01-09" />
  <publisher value="Kassenärztliche Bundesvereinigung (KBV)" />
  <fhirVersion value="4.0.1" />
  <kind value="resource" />
  <abstract value="false" />
  <type value="Medication" />
  <baseDefinition value="https://fhir.kbv.de/StructureDefinition/KBV_PR_Base_Medication|1.7.0" />
  <derivation value="constraint" />
  <differential>
    <element id="Medication.id">
      <path value="Medication.id" />
      <min value="1" />
      <mustSupport value="true" />
    </element>
    <element id="Medication.meta">
      <path value="Medication.meta" />
      <min value="1" />
      <mustSupport value="true" />
    </element>
    <element id="Medication.meta.versionId">
      <path value="Medication.meta.versionId" />
      <min value="1" />
      <max value="1" />
      <mustSupport value="true" />
    </element>
    <element id="Medication.meta.lastUpdated">
      <path value="Medication.meta.lastUpdated" />
      <max value="0" />
    </element>
    <element id="Medication.meta.source">
      <path value="Medication.meta.source" />
      <max value="0" />
    </element>
    <element id="Medication.meta.profile">
      <path value="Medication.meta.profile" />
      <slicing>
        <discriminator>
          <type value="value" />
          <path value="$this" />
        </discriminator>
        <rules value="open" />
      </slicing>
      <min value="1" />
      <mustSupport value="true" />
    </element>
    <element id="Medication.meta.profile:erpProfile">
      <path value="Medication.meta.profile" />
      <sliceName value="erpProfile" />
      <min value="1" />
      <max value="1" />
      <fixedCanonical value="https://fhir.kbv.de/StructureDefinition/KBV_PR_ERP_Medication_Compounding|1.4" />
      <mustSupport value="true" />
    </element>
    <element id="Medication.meta.security">
      <path value="Medication.meta.security" />
      <max value="0" />
    </element>
    <element id="Medication.meta.tag">
      <path value="Medication.meta.tag" />
      <max value="0" />
    </element>
    <element id="Medication.implicitRules">
      <path value="Medication.implicitRules" />
      <max value="0" />
    </element>
    <element id="Medication.language">
      <path value="Medication.language" />
      <max value="0" />
    </element>
    <element id="Medication.text">
      <path value="Medication.text" />
      <max value="0" />
    </element>
    <element id="Medication.contained">
      <path value="Medication.contained" />
      <max value="0" />
    </element>
    <element id="Medication.extension">
      <path value="Medication.extension" />
      <slicing>
        <discriminator>
          <type value="value" />
          <path value="url" />
        </discriminator>
        <rules value="closed" />
      </slicing>
      <min value="3" />
      <max value="5" />
    </element>
    <element id="Medication.extension:Kategorie">
      <path value="Medication.extension" />
      <sliceName value="Kategorie" />
      <min value="1" />
      <mustSupport value="true" />
    </element>
    <element id="Medication.extension:Kategorie.value[x]">
      <path value="Medication.extension.value[x]" />
      <slicing>
        <discriminator>
          <type value="type" />
          <path value="$this" />
        </discriminator>
        <rules value="closed" />
      </slicing>
      <mustSupport value="true" />
    </element>
    <element id="Medication.extension:Kategorie.value[x]:valueCodeableConcept">
      <path value="Medication.extension.value[x]" />
      <sliceName value="valueCodeableConcept" />
      <mustSupport value="true" />
    </element>
    <element id="Medication.extension:Kategorie.value[x]:valueCodeableConcept.coding">
      <path value="Medication.extension.value[x].coding" />
      <mustSupport value="true" />
    </element>
    <element id="Medication.extension:Kategorie.value[x]:valueCodeableConcept.coding.system">
      <path value="Medication.extension.value[x].coding.system" />
      <fixedUri value="http://snomed.info/sct" />
      <mustSupport value="true" />
    </element>
    <element id="Medication.extension:Kategorie.value[x]:valueCodeableConcept.coding.version">
      <path value="Medication.extension.value[x].coding.version" />
      <fixedString value="http://snomed.info/sct/11000274103/version/20240515" />
      <mustSupport value="true" />
    </element>
    <element id="Medication.extension:Kategorie.value[x]:valueCodeableConcept.coding.code">
      <path value="Medication.extension.value[x].coding.code" />
      <fixedCode value="1208954007" />
      <mustSupport value="true" />
    </element>
    <element id="Medication.extension:Kategorie.value[x]:valueCodeableConcept.coding.display">
      <path value="Medication.extension.value[x].coding.display" />
      <fixedString value="Extemporaneous preparation (product)" />
      <mustSupport value="true" />
    </element>
    <element id="Medication.extension:Kategorie.value[x]:valueCodeableConcept.coding.userSelected">
      <path value="Medication.extension.value[x].coding.userSelected" />
      <max value="0" />
    </element>
    <element id="Medication.extension:Normgroesse">
      <path value="Medication.extension" />
      <sliceName value="Normgroesse" />
      <max value="0" />
    </element>
    <element id="Medication.extension:Arzneimittelkategorie">
      <path value="Medication.extension" />
      <sliceName value="Arzneimittelkategorie" />
      <min value="1" />
      <max value="1" />
      <type>
        <code value="Extension" />
        <profile value="https://fhir.kbv.de/StructureDefinition/KBV_EX_ERP_Medication_Category" />
      </type>
      <mustSupport value="true" />
    </element>
    <element id="Medication.extension:Arzneimittelkategorie.value[x]">
      <path value="Medication.extension.value[x]" />
      <mustSupport value="true" />
    </element>
    <element id="Medication.extension:Arzneimittelkategorie.value[x]:valueCoding">
      <path value="Medication.extension.value[x]" />
      <sliceName value="valueCoding" />
      <mustSupport value="true" />
    </element>
    <element id="Medication.extension:Arzneimittelkategorie.value[x]:valueCoding.system">
      <path value="Medication.extension.value[x].system" />
      <mustSupport value="true" />
    </element>
    <element id="Medication.extension:Arzneimittelkategorie.value[x]:valueCoding.code">
      <path value="Medication.extension.value[x].code" />
      <mustSupport value="true" />
    </element>
    <element id="Medication.extension:Impfstoff">
      <path value="Medication.extension" />
      <sliceName value="Impfstoff" />
      <min value="1" />
      <max value="1" />
      <type>
        <code value="Extension" />
        <profile value="https://fhir.kbv.de/StructureDefinition/KBV_EX_ERP_Medication_Vaccine" />
      </type>
      <mustSupport value="true" />
    </element>
    <element id="Medication.extension:Impfstoff.value[x]">
      <path value="Medication.extension.value[x]" />
      <mustSupport value="true" />
    </element>
    <element id="Medication.extension:Impfstoff.value[x]:valueBoolean">
      <path value="Medication.extension.value[x]" />
      <sliceName value="valueBoolean" />
      <mustSupport value="true" />
    </element>
    <element id="Medication.extension:Herstellungsanweisung">
      <path value="Medication.extension" />
      <sliceName value="Herstellungsanweisung" />
      <max value="1" />
      <type>
        <code value="Extension" />
        <profile value="https://fhir.kbv.de/StructureDefinition/KBV_EX_ERP_Medication_CompoundingInstruction" />
      </type>
      <mustSupport value="true" />
    </element>
    <element id="Medication.extension:Herstellungsanweisung.value[x]">
      <path value="Medication.extension.value[x]" />
      <mustSupport value="true" />
    </element>
    <element id="Medication.extension:Herstellungsanweisung.value[x]:valueString">
      <path value="Medication.extension.value[x]" />
      <sliceName value="valueString" />
      <mustSupport value="true" />
    </element>
    <element id="Medication.extension:Verpackung">
      <path value="Medication.extension" />
      <sliceName value="Verpackung" />
      <max value="1" />
      <type>
        <code value="Extension" />
        <profile value="https://fhir.kbv.de/StructureDefinition/KBV_EX_ERP_Medication_Packaging" />
      </type>
      <mustSupport value="true" />
    </element>
    <element id="Medication.extension:Verpackung.value[x]">
      <path value="Medication.extension.value[x]" />
      <mustSupport value="true" />
    </element>
    <element id="Medication.extension:Verpackung.value[x]:valueString">
      <path value="Medication.extension.value[x]" />
      <sliceName value="valueString" />
      <mustSupport value="true" />
    </element>
    <element id="Medication.identifier">
      <path value="Medication.identifier" />
      <max value="0" />
    </element>
    <element id="Medication.code">
      <path value="Medication.code" />
      <mustSupport value="true" />
    </element>
    <element id="Medication.code.coding">
      <path value="Medication.code.coding" />
      <slicing>
        <discriminator>
          <type value="value" />
          <path value="$this" />
        </discriminator>
        <rules value="closed" />
      </slicing>
      <min value="1" />
      <max value="1" />
    </element>
    <element id="Medication.code.coding:pzn">
      <path value="Medication.code.coding" />
      <sliceName value="pzn" />
      <max value="0" />
    </element>
    <element id="Medication.code.coding:snomed">
      <path value="Medication.code.coding" />
      <sliceName value="snomed" />
      <max value="0" />
    </element>
    <element id="Medication.code.coding:atc">
      <path value="Medication.code.coding" />
      <sliceName value="atc" />
      <max value="0" />
    </element>
    <element id="Medication.code.coding:verordnungskategorieCode">
      <path value="Medication.code.coding" />
      <sliceName value="verordnungskategorieCode" />
      <min value="1" />
      <max value="1" />
      <patternCoding>
        <system value="https://fhir.kbv.de/CodeSystem/KBV_CS_ERP_Medication_Type" />
      </patternCoding>
      <mustSupport value="true" />
    </element>
    <element id="Medication.code.coding:verordnungskategorieCode.system">
      <path value="Medication.code.coding.system" />
      <min value="1" />
      <fixedUri value="https://fhir.kbv.de/CodeSystem/KBV_CS_ERP_Medication_Type" />
      <mustSupport value="true" />
    </element>
    <element id="Medication.code.coding:verordnungskategorieCode.version">
      <path value="Medication.code.coding.version" />
      <max value="0" />
    </element>
    <element id="Medication.code.coding:verordnungskategorieCode.code">
      <path value="Medication.code.coding.code" />
      <short value="Kennzeichnung Rezepturverordnung" />
      <definition value="Anhand des &quot;Fixed value&quot; kann die Medication als Rezepturverordnung identifiziert werden." />
      <min value="1" />
      <fixedCode value="rezeptur" />
      <mustSupport value="true" />
    </element>
    <element id="Medication.code.coding:verordnungskategorieCode.display">
      <path value="Medication.code.coding.display" />
      <max value="0" />
    </element>
    <element id="Medication.code.coding:verordnungskategorieCode.userSelected">
      <path value="Medication.code.coding.userSelected" />
      <max value="0" />
    </element>
    <element id="Medication.code.text">
      <path value="Medication.code.text" />
      <short value="Rezepturname" />
      <definition value="Bezeichnung der Rezeptur (z.B. gemäß deutsches Arzneibuches: Zinkpaste DAB2020)" />
      <maxLength value="70" />
      <mustSupport value="true" />
    </element>
    <element id="Medication.status">
      <path value="Medication.status" />
      <max value="0" />
    </element>
    <element id="Medication.manufacturer">
      <path value="Medication.manufacturer" />
      <max value="0" />
    </element>
    <element id="Medication.form">
      <path value="Medication.form" />
      <min value="1" />
      <mustSupport value="true" />
    </element>
    <element id="Medication.form.coding">
      <path value="Medication.form.coding" />
      <max value="0" />
    </element>
    <element id="Medication.form.coding:snomed">
      <path value="Medication.form.coding" />
      <sliceName value="snomed" />
      <max value="0" />
    </element>
    <element id="Medication.form.coding:edqm">
      <path value="Medication.form.coding" />
      <sliceName value="edqm" />
      <max value="0" />
    </element>
    <element id="Medication.form.coding:kbvDarreichungsform">
      <path value="Medication.form.coding" />
      <sliceName value="kbvDarreichungsform" />
      <max value="0" />
    </element>
    <element id="Medication.form.text">
      <path value="Medication.form.text" />
      <short value="Darreichungsform Freitext" />
      <definition value="Angabe der Darreichungsform als Freitext" />
      <min value="1" />
      <maxLength value="30" />
      <mustSupport value="true" />
    </element>
    <element id="Medication.amount">
      <path value="Medication.amount" />
      <min value="1" />
      <mustSupport value="true" />
    </element>
    <element id="Medication.amount.numerator">
      <path value="Medication.amount.numerator" />
      <min value="1" />
      <mustSupport value="true" />
    </element>
    <element id="Medication.amount.numerator.extension">
      <path value="Medication.amount.numerator.extension" />
      <slicing>
        <discriminator>
          <type value="value" />
          <path value="url" />
        </discriminator>
        <rules value="closed" />
      </slicing>
      <min value="1" />
      <max value="1" />
    </element>
    <element id="Medication.amount.numerator.extension:Gesamtmenge">
      <path value="Medication.amount.numerator.extension" />
      <sliceName value="Gesamtmenge" />
      <short value="Gesamtmenge der Rezeptur" />
      <definition value="Gesamtmenge der Rezeptur (ohne die Einheit)" />
      <min value="1" />
      <max value="1" />
      <type>
        <code value="Extension" />
        <profile value="https://fhir.kbv.de/StructureDefinition/KBV_EX_ERP_Medication_PackagingSize" />
      </type>
      <mustSupport value="true" />
      <isModifier value="false" />
    </element>
    <element id="Medication.amount.numerator.extension:Gesamtmenge.value[x]">
      <path value="Medication.amount.numerator.extension.value[x]" />
      <mustSupport value="true" />
    </element>
    <element id="Medication.amount.numerator.extension:Gesamtmenge.value[x]:valueString">
      <path value="Medication.amount.numerator.extension.value[x]" />
      <sliceName value="valueString" />
      <short value="Gesamtmenge der Rezeptur" />
      <definition value="Gesamtmenge der Rezeptur (ohne die Einheit)" />
      <mustSupport value="true" />
    </element>
    <element id="Medication.amount.numerator.value">
      <path value="Medication.amount.numerator.value" />
      <max value="0" />
    </element>
    <element id="Medication.amount.numerator.comparator">
      <path value="Medication.amount.numerator.comparator" />
      <max value="0" />
    </element>
    <element id="Medication.amount.numerator.unit">
      <path value="Medication.amount.numerator.unit" />
      <short value="Einheit der Gesamtmenge" />
      <definition value="Einheit der Gesamtmenge einer Rezeptur" />
      <min value="1" />
      <maxLength value="12" />
      <mustSupport value="true" />
    </element>
    <element id="Medication.amount.numerator.system">
      <path value="Medication.amount.numerator.system" />
      <max value="0" />
    </element>
    <element id="Medication.amount.numerator.code">
      <path value="Medication.amount.numerator.code" />
      <max value="0" />
    </element>
    <element id="Medication.amount.denominator">
      <path value="Medication.amount.denominator" />
      <min value="1" />
      <mustSupport value="true" />
    </element>
    <element id="Medication.amount.denominator.value">
      <path value="Medication.amount.denominator.value" />
      <min value="1" />
      <fixedDecimal value="1" />
      <mustSupport value="true" />
    </element>
    <element id="Medication.amount.denominator.comparator">
      <path value="Medication.amount.denominator.comparator" />
      <max value="0" />
    </element>
    <element id="Medication.amount.denominator.unit">
      <path value="Medication.amount.denominator.unit" />
      <max value="0" />
    </element>
    <element id="Medication.amount.denominator.system">
      <path value="Medication.amount.denominator.system" />
      <max value="0" />
    </element>
    <element id="Medication.amount.denominator.code">
      <path value="Medication.amount.denominator.code" />
      <max value="0" />
    </element>
    <element id="Medication.ingredient">
      <path value="Medication.ingredient" />
      <min value="1" />
      <mustSupport value="true" />
    </element>
    <element id="Medication.ingredient.extension">
      <path value="Medication.ingredient.extension" />
      <slicing>
        <discriminator>
          <type value="value" />
          <path value="url" />
        </discriminator>
        <rules value="closed" />
      </slicing>
      <max value="1" />
    </element>
    <element id="Medication.ingredient.extension:Darreichungsform">
      <path value="Medication.ingredient.extension" />
      <sliceName value="Darreichungsform" />
      <max value="1" />
      <type>
        <code value="Extension" />
        <profile value="https://fhir.kbv.de/StructureDefinition/KBV_EX_ERP_Medication_Ingredient_Form" />
      </type>
      <mustSupport value="true" />
    </element>
    <element id="Medication.ingredient.extension:Darreichungsform.value[x]">
      <path value="Medication.ingredient.extension.value[x]" />
      <mustSupport value="true" />
    </element>
    <element id="Medication.ingredient.extension:Darreichungsform.value[x]:valueString">
      <path value="Medication.ingredient.extension.value[x]" />
      <sliceName value="valueString" />
      <mustSupport value="true" />
    </element>
    <element id="Medication.ingredient.item[x]">
      <path value="Medication.ingredient.item[x]" />
      <slicing>
        <discriminator>
          <type value="type" />
          <path value="$this" />
        </discriminator>
        <rules value="closed" />
      </slicing>
      <type>
        <code value="CodeableConcept" />
      </type>
    </element>
    <element id="Medication.ingredient.item[x]:itemCodeableConcept">
      <path value="Medication.ingredient.item[x]" />
      <sliceName value="itemCodeableConcept" />
      <type>
        <code value="CodeableConcept" />
      </type>
      <mustSupport value="true" />
    </element>
    <element id="Medication.ingredient.item[x]:itemCodeableConcept.coding">
      <path value="Medication.ingredient.item[x].coding" />
      <slicing>
        <discriminator>
          <type value="value" />
          <path value="$this" />
        </discriminator>
        <rules value="closed" />
      </slicing>
      <max value="1" />
    </element>
    <element id="Medication.ingredient.item[x]:itemCodeableConcept.coding:ask">
      <path value="Medication.ingredient.item[x].coding" />
      <sliceName value="ask" />
      <max value="0" />
    </element>
    <element id="Medication.ingredient.item[x]:itemCodeableConcept.coding:snomed">
      <path value="Medication.ingredient.item[x].coding" />
      <sliceName value="snomed" />
      <max value="0" />
    </element>
    <element id="Medication.ingredient.item[x]:itemCodeableConcept.coding:pzn">
      <path value="Medication.ingredient.item[x].coding" />
      <sliceName value="pzn" />
      <max value="1" />
      <patternCoding>
        <system value="http://fhir.de/CodeSystem/ifa/pzn" />
      </patternCoding>
      <constraint>
        <key value="-erp-begrenzungPznCode" />
        <severity value="error" />
        <human value="Der PZN-Code muss aus genau 8 Zeichen bestehen." />
        <expression value="code.length()=8" />
      </constraint>
      <mustSupport value="true" />
    </element>
    <element id="Medication.ingredient.item[x]:itemCodeableConcept.coding:pzn.system">
      <path value="Medication.ingredient.item[x].coding.system" />
      <min value="1" />
      <fixedUri value="http://fhir.de/CodeSystem/ifa/pzn" />
      <mustSupport value="true" />
    </element>
    <element id="Medication.ingredient.item[x]:itemCodeableConcept.coding:pzn.version">
      <path value="Medication.ingredient.item[x].coding.version" />
      <max value="0" />
    </element>
    <element id="Medication.ingredient.item[x]:itemCodeableConcept.coding:pzn.code">
      <path value="Medication.ingredient.item[x].coding.code" />
      <short value="PZN des Bestandteils" />
      <definition value="eindeutige Identifikation des Arzneimittels mittels PZN, das vollständig oder teilweise für die Rezeptur verwandt werden soll" />
      <min value="1" />
      <mustSupport value="true" />
    </element>
    <element id="Medication.ingredient.item[x]:itemCodeableConcept.coding:pzn.display">
      <path value="Medication.ingredient.item[x].coding.display" />
      <max value="0" />
    </element>
    <element id="Medication.ingredient.item[x]:itemCodeableConcept.coding:pzn.userSelected">
      <path value="Medication.ingredient.item[x].coding.userSelected" />
      <max value="0" />
    </element>
    <element id="Medication.ingredient.item[x]:itemCodeableConcept.text">
      <path value="Medication.ingredient.item[x].text" />
      <short value="Name des Bestandteils" />
      <definition value="Namentliche Bezeichnung des Bestandteiles der Rezeptur&#xD;&#xA;Wenn die PZN des Bestandteils vorhanden ist, dann ist der hinter der PZN liegende Handelsname anzugeben." />
      <min value="1" />
      <maxLength value="60" />
      <mustSupport value="true" />
    </element>
    <element id="Medication.ingredient.item[x]:itemReference">
      <path value="Medication.ingredient.item[x]" />
      <sliceName value="itemReference" />
      <max value="0" />
    </element>
    <element id="Medication.ingredient.isActive">
      <path value="Medication.ingredient.isActive" />
      <max value="0" />
    </element>
    <element id="Medication.ingredient.strength">
      <path value="Medication.ingredient.strength" />
      <min value="1" />
      <constraint>
        <key value="-erp-numeratorOderFreitext" />
        <severity value="error" />
        <human value="Entweder ist die Menge des Bestandteils durch &quot;numerator&quot; oder als Freitext anzugeben." />
        <expression value="extension('https://fhir.kbv.de/StructureDefinition/KBV_EX_ERP_Medication_Ingredient_Amount').exists() xor numerator.exists()" />
      </constraint>
      <mustSupport value="true" />
    </element>
    <element id="Medication.ingredient.strength.extension">
      <path value="Medication.ingredient.strength.extension" />
      <slicing>
        <discriminator>
          <type value="value" />
          <path value="url" />
        </discriminator>
        <rules value="closed" />
      </slicing>
      <max value="1" />
    </element>
    <element id="Medication.ingredient.strength.extension:MengeFreitext">
      <path value="Medication.ingredient.strength.extension" />
      <sliceName value="MengeFreitext" />
      <max value="1" />
      <type>
        <code value="Extension" />
        <profile value="https://fhir.kbv.de/StructureDefinition/KBV_EX_ERP_Medication_Ingredient_Amount" />
      </type>
      <mustSupport value="true" />
    </element>
    <element id="Medication.ingredient.strength.extension:MengeFreitext.value[x]">
      <path value="Medication.ingredient.strength.extension.value[x]" />
      <mustSupport value="true" />
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    <element id="Medication.ingredient.strength.extension:MengeFreitext.value[x]:valueString">
      <path value="Medication.ingredient.strength.extension.value[x]" />
      <sliceName value="valueString" />
      <mustSupport value="true" />
    </element>
    <element id="Medication.ingredient.strength.numerator">
      <path value="Medication.ingredient.strength.numerator" />
      <constraint>
        <key value="-erp-begrenzungValue" />
        <severity value="error" />
        <human value="Die Menge eines Bestandteils einer Rezeptur darf aus maximal 7 Zeichen bestehen." />
        <expression value="value.toString().length() &lt;= 7" />
      </constraint>
      <mustSupport value="true" />
    </element>
    <element id="Medication.ingredient.strength.numerator.value">
      <path value="Medication.ingredient.strength.numerator.value" />
      <short value="Menge des Bestandteils" />
      <definition value="Verordnete Menge des Bestandteils z.B. 100" />
      <min value="1" />
      <mustSupport value="true" />
    </element>
    <element id="Medication.ingredient.strength.numerator.comparator">
      <path value="Medication.ingredient.strength.numerator.comparator" />
      <max value="0" />
    </element>
    <element id="Medication.ingredient.strength.numerator.unit">
      <path value="Medication.ingredient.strength.numerator.unit" />
      <short value="Einheit des Bestandteils" />
      <definition value="Verordnete Einheit des Bestandteils z. B. mg" />
      <min value="1" />
      <maxLength value="12" />
      <mustSupport value="true" />
    </element>
    <element id="Medication.ingredient.strength.numerator.system">
      <path value="Medication.ingredient.strength.numerator.system" />
      <max value="0" />
    </element>
    <element id="Medication.ingredient.strength.numerator.code">
      <path value="Medication.ingredient.strength.numerator.code" />
      <max value="0" />
    </element>
    <element id="Medication.ingredient.strength.denominator">
      <path value="Medication.ingredient.strength.denominator" />
      <mustSupport value="true" />
    </element>
    <element id="Medication.ingredient.strength.denominator.value">
      <path value="Medication.ingredient.strength.denominator.value" />
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      <fixedDecimal value="1" />
      <mustSupport value="true" />
    </element>
    <element id="Medication.ingredient.strength.denominator.comparator">
      <path value="Medication.ingredient.strength.denominator.comparator" />
      <max value="0" />
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    <element id="Medication.ingredient.strength.denominator.unit">
      <path value="Medication.ingredient.strength.denominator.unit" />
      <max value="0" />
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    <element id="Medication.ingredient.strength.denominator.system">
      <path value="Medication.ingredient.strength.denominator.system" />
      <max value="0" />
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    <element id="Medication.ingredient.strength.denominator.code">
      <path value="Medication.ingredient.strength.denominator.code" />
      <max value="0" />
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  </differential>
</StructureDefinition>