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  <xs:element id="kltr_DisallowedBusinessInterestExpense" abstract="false" name="DisallowedBusinessInterestExpense" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="kltr_DeferredTaxAssetsCapitalizedRDCosts" abstract="false" name="DeferredTaxAssetsCapitalizedRDCosts" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="kltr_DeferredTaxAssetsTaxDeferredExpenseOperatingLeaseLiabilities" abstract="false" name="DeferredTaxAssetsTaxDeferredExpenseOperatingLeaseLiabilities" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="kltr_DeferredTaxAssetsTaxDeferredExpenseOperatingLeaseRightOfUseAssets" abstract="false" name="DeferredTaxAssetsTaxDeferredExpenseOperatingLeaseRightOfUseAssets" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="kltr_IncomeTaxReconciliationExchangeRateDifferences" abstract="false" name="IncomeTaxReconciliationExchangeRateDifferences" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="kltr_EnterpriseAxis" abstract="true" name="EnterpriseAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="kltr_EnterpriseDomain" abstract="true" name="EnterpriseDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="kltr_BeneficiaryEnterpriseMember" abstract="true" name="BeneficiaryEnterpriseMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="kltr_OtherCountriesMember" abstract="true" name="OtherCountriesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="kltr_TermLoanFacilityMember" abstract="true" name="TermLoanFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="kltr_AlternateBaseRateMember" abstract="true" name="AlternateBaseRateMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="kltr_FederalFundsEffectiveRateMember" abstract="true" name="FederalFundsEffectiveRateMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="kltr_StatedPercentageTypeAxis" abstract="true" name="StatedPercentageTypeAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="kltr_StatedPercentageTypeDomain" abstract="true" name="StatedPercentageTypeDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="kltr_InterestMarginMember" abstract="true" name="InterestMarginMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="kltr_CreditAdjustmentSpreadMember" abstract="true" name="CreditAdjustmentSpreadMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="kltr_InstallmentPaymentDateAxis" abstract="true" name="InstallmentPaymentDateAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="kltr_InstallmentPaymentDateDomain" abstract="true" name="InstallmentPaymentDateDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="kltr_OnDecember312023ThroughSeptember302024Member" abstract="true" name="OnDecember312023ThroughSeptember302024Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="kltr_OnDecember312024ThroughSeptember302025Member" abstract="true" name="OnDecember312024ThroughSeptember302025Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="kltr_OnAndAfterDecember312025Member" abstract="true" name="OnAndAfterDecember312025Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="kltr_A2021PlanMember" abstract="true" name="A2021PlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="kltr_A2020PlanMember" abstract="true" name="A2020PlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="kltr_ShareBasedPaymentArrangementPlanIncreaseOfAuthorizedSharesAsAPercentageOfOutstandingShares" abstract="false" name="ShareBasedPaymentArrangementPlanIncreaseOfAuthorizedSharesAsAPercentageOfOutstandingShares" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="kltr_ShareRepurchaseProgramMember" abstract="true" name="ShareRepurchaseProgramMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="kltr_FinancialIncomeAbstract" abstract="true" name="FinancialIncomeAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="kltr_FinancialIncome" abstract="false" name="FinancialIncome" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="kltr_FinancialExpensesAbstract" abstract="true" name="FinancialExpensesAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="kltr_BankFees" abstract="false" name="BankFees" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="kltr_FinancialExpenses" abstract="false" name="FinancialExpenses" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
</xs:schema>
