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  <xs:element id="revv_TermLoanCreditFacilityMaximumBorrowingCapacity" abstract="false" name="TermLoanCreditFacilityMaximumBorrowingCapacity" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="revv_DebtRedemptionPretaxNonoperatingCharges" abstract="false" name="DebtRedemptionPretaxNonoperatingCharges" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="revv_DebtRedemptionMakewhole" abstract="false" name="DebtRedemptionMakewhole" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="revv_DebtRedemptionDeferredcostsandOriginalIssueDiscount" abstract="false" name="DebtRedemptionDeferredcostsandOriginalIssueDiscount" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="revv_EurocurrencyMarginBasisPoint" abstract="false" name="EurocurrencyMarginBasisPoint" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="revv_CarryingValueOfInvestmentsInUSTreasurySecuritiesMeasuredAtAmortizedCostHeldToMaturity" abstract="false" name="CarryingValueOfInvestmentsInUSTreasurySecuritiesMeasuredAtAmortizedCostHeldToMaturity" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="revv_IncrementalCommonSharesAttributableToShareBasedPaymentArrangementsStockOptions" abstract="false" name="IncrementalCommonSharesAttributableToShareBasedPaymentArrangementsStockOptions" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="revv_IncrementalCommonSharesAttributableToShareBasedPaymentsArrangementsRestrictedStockAwards" abstract="false" name="IncrementalCommonSharesAttributableToShareBasedPaymentsArrangementsRestrictedStockAwards" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="revv_IndustrySegmentInformationNarrativeAbstract" abstract="true" name="IndustrySegmentInformationNarrativeAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="revv_RevenuePurchaseAccountingAdjustmentsAxis" abstract="true" name="RevenuePurchaseAccountingAdjustmentsAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="revv_RevenuePurchaseAccountingAdjustmentsDomain" abstract="true" name="RevenuePurchaseAccountingAdjustmentsDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="revv_RevenuePurchaseAccountingAdjustmentsMember" abstract="true" name="RevenuePurchaseAccountingAdjustmentsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="revv_SegmentReportingAxis" abstract="true" name="SegmentReportingAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
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  <xs:element id="revv_ReportableSegmentRevenueMember" abstract="true" name="ReportableSegmentRevenueMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="revv_SegmentOperatingIncomeMember" abstract="true" name="SegmentOperatingIncomeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="revv_ReconcilingItemToReconcileSegmentOperatingIncomeToIncomeFromContinuingOperationsBeforeIncomeTaxesMember" abstract="true" name="ReconcilingItemToReconcileSegmentOperatingIncomeToIncomeFromContinuingOperationsBeforeIncomeTaxesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="revv_HumanHealthMember" abstract="true" name="HumanHealthMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="revv_EnvironmentalHealthMember" abstract="true" name="EnvironmentalHealthMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="revv_SegmentCostOfRevenue" abstract="false" name="SegmentCostOfRevenue" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="revv_SegmentSellingGeneralAndAdministrativeExpenses" abstract="false" name="SegmentSellingGeneralAndAdministrativeExpenses" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="revv_SegmentResearchAndDevelopmentExpenses" abstract="false" name="SegmentResearchAndDevelopmentExpenses" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="revv_SegmentOperatingIncome" abstract="false" name="SegmentOperatingIncome" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="revv_CorporateExpenses" abstract="false" name="CorporateExpenses" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="revv_PurchaseAccountingAdjustments" abstract="false" name="PurchaseAccountingAdjustments" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="revv_SignificantEnvironmentalMatters" abstract="false" name="SignificantEnvironmentalMatters" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="revv_TransformationCosts" abstract="false" name="TransformationCosts" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="revv_ScheduleOfDepreciationAmortizationAndCapitalExpendituresTable" abstract="true" name="ScheduleOfDepreciationAmortizationAndCapitalExpendituresTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="revv_CorporateReconcilingItemMember" abstract="true" name="CorporateReconcilingItemMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="revv_ScheduleofShareholdersEquityTable" abstract="true" name="ScheduleofShareholdersEquityTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="revv_RepurchaseProgram10232025Member" abstract="true" name="RepurchaseProgram10232025Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="revv_AnalyticalFoodAndEnterpriseServicesBusinessesMember" abstract="true" name="AnalyticalFoodAndEnterpriseServicesBusinessesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="revv_O2026Q1DividendsMember" abstract="true" name="O2026Q1DividendsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="revv_O2026Q2DividendsMember" abstract="true" name="O2026Q2DividendsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="revv_ScheduleofShareholdersEquityLineItems" abstract="true" name="ScheduleofShareholdersEquityLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="revv_RepurchasedCommonSharesForActivityPursuanttoEquityIncentivePlans" abstract="false" name="RepurchasedCommonSharesForActivityPursuanttoEquityIncentivePlans" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="revv_AggregateCostOfRepurchasedCommonSharesUnderRepurchaseProgram" abstract="false" name="AggregateCostOfRepurchasedCommonSharesUnderRepurchaseProgram" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="revv_AggregateCostofRepurchasedCommonSharesforActivityPursuanttoEquityIncentivePlans" abstract="false" name="AggregateCostofRepurchasedCommonSharesforActivityPursuanttoEquityIncentivePlans" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="revv_UnrealizedForeignExchangeLossesGainsOnIntercompanyDebtInAOCI" abstract="false" name="UnrealizedForeignExchangeLossesGainsOnIntercompanyDebtInAOCI" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="revv_ShareRepurchaseProgramStartDate" abstract="false" name="ShareRepurchaseProgramStartDate" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:dateItemType"/>
  <xs:element id="revv_IncomeTaxesRelatedToForeignCurrencyTranslationAdjustmentsRecognizedInAOCI" abstract="false" name="IncomeTaxesRelatedToForeignCurrencyTranslationAdjustmentsRecognizedInAOCI" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="revv_GoodwillAndIntangibleAssetsNetTable" abstract="true" name="GoodwillAndIntangibleAssetsNetTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="revv_MedicalImagingBusinessMember" abstract="true" name="MedicalImagingBusinessMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="revv_InformaticsMember" abstract="true" name="InformaticsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="revv_TulipDiagnosticsPrivateLimitedMember" abstract="true" name="TulipDiagnosticsPrivateLimitedMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="revv_FiscalYear2015AcquisitionsMember" abstract="true" name="FiscalYear2015AcquisitionsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="revv_FiniteAndIndefiniteLivedIntangibleAssetsByMajorClassAxis" abstract="true" name="FiniteAndIndefiniteLivedIntangibleAssetsByMajorClassAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="revv_FiniteAndIndefiniteLivedIntangibleAssetsMajorClassNameDomain" abstract="true" name="FiniteAndIndefiniteLivedIntangibleAssetsMajorClassNameDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="revv_TradeNamesAndTrademarksMember" abstract="true" name="TradeNamesAndTrademarksMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="revv_GoodwillAndIntangibleAssetsNetLineItems" abstract="true" name="GoodwillAndIntangibleAssetsNetLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="revv_LongTermTerminalGrowthRatesForReportingUnits" abstract="false" name="LongTermTerminalGrowthRatesForReportingUnits" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="revv_DiscountRatesForReportingUnits" abstract="false" name="DiscountRatesForReportingUnits" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="revv_ChangeInAnyOneOfInputAssumptionsForVariousReportingUnits" abstract="false" name="ChangeInAnyOneOfInputAssumptionsForVariousReportingUnits" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="revv_AnnualGoodwillImpairmentTestingDate" abstract="false" name="AnnualGoodwillImpairmentTestingDate" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="revv_OldDateOfAnnualGoodwillImpairmentTest" abstract="false" name="OldDateOfAnnualGoodwillImpairmentTest" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="revv_ScheduleOfFiniteAndIndefiniteLivedIntangibleAssetsByMajorClassTable" abstract="true" name="ScheduleOfFiniteAndIndefiniteLivedIntangibleAssetsByMajorClassTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="revv_FiniteAndIndefiniteLivedIntangibleAssetsByMajorClassLineItems" abstract="true" name="FiniteAndIndefiniteLivedIntangibleAssetsByMajorClassLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="revv_NetinvestmenthedgeAxis" abstract="true" name="NetinvestmenthedgeAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="revv_NetinvestmenthedgeDomain" abstract="true" name="NetinvestmenthedgeDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="revv_DerivativeNotionalCurrencyAxis" abstract="true" name="DerivativeNotionalCurrencyAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="revv_DerivativeNotionalCurrencyDomain" abstract="true" name="DerivativeNotionalCurrencyDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="revv_NotionalAmountofEuroDerivativesMember" abstract="true" name="NotionalAmountofEuroDerivativesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="revv_NotionalAmountofSEKDerivativesMember" abstract="true" name="NotionalAmountofSEKDerivativesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="revv_NotionalAmountofUSDollarDerivativesMember" abstract="true" name="NotionalAmountofUSDollarDerivativesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="revv_RemovalOfHedgingRelationshipAxis" abstract="true" name="RemovalOfHedgingRelationshipAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="revv_RemovalOfHedgingRelationshipDomain" abstract="true" name="RemovalOfHedgingRelationshipDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="revv_EuropeanAndAsianCurrenciesMember" abstract="true" name="EuropeanAndAsianCurrenciesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="revv_InterestRateSwaptionAxis" abstract="true" name="InterestRateSwaptionAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="revv_InterestRateSwaptionDomain" abstract="true" name="InterestRateSwaptionDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="revv_PercentageOfBusinessOutsideDomesticCountry" abstract="false" name="PercentageOfBusinessOutsideDomesticCountry" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="revv_DurationOfForeignCurrencyDerivatives" abstract="false" name="DurationOfForeignCurrencyDerivatives" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="revv_UnrealizedGainLossonNetInvestmentHedgeinAOCI" abstract="false" name="UnrealizedGainLossonNetInvestmentHedgeinAOCI" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="revv_OtherDebtFacilitiesIncludingTheSeniorRevolvingCreditFacilityMember" abstract="true" name="OtherDebtFacilitiesIncludingTheSeniorRevolvingCreditFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="revv_Projectedmilestonedate" abstract="false" name="Projectedmilestonedate" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:gYearItemType"/>
  <xs:element id="revv_Conditionalprobabilityofsuccess" abstract="false" name="Conditionalprobabilityofsuccess" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="revv_Cumulativeprobabilityofsuccess" abstract="false" name="Cumulativeprobabilityofsuccess" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="revv_BusinessCombinationContingentConsiderationMilestoneAchievedButNotPaidOtherCurrentLiability" abstract="false" name="BusinessCombinationContingentConsiderationMilestoneAchievedButNotPaidOtherCurrentLiability" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="revv_DisposalGroupConsiderationContingentOnExitValuation" abstract="false" name="DisposalGroupConsiderationContingentOnExitValuation" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="revv_NumberOfYearsOverWhichEstimatedEnvironmentalCostWillBePaid" abstract="false" name="NumberOfYearsOverWhichEstimatedEnvironmentalCostWillBePaid" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="revv_DisposalGroupConsiderationReceivableAtClosing" abstract="false" name="DisposalGroupConsiderationReceivableAtClosing" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="revv_JoelS.GoldbergMember" abstract="true" name="JoelS.GoldbergMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="revv_PrahladSinghMember" abstract="true" name="PrahladSinghMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
</xs:schema>
