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  <xs:element id="oust_OfficeAndManufacturingSpaceInSanJoseCaliforniaMember" abstract="true" name="OfficeAndManufacturingSpaceInSanJoseCaliforniaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="oust_ContractWithCustomerLiabilityNoncurrentAbstract" abstract="true" name="ContractWithCustomerLiabilityNoncurrentAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="oust_SupplierAMember" abstract="true" name="SupplierAMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="oust_A2022EmployeeStockPurchasePlanMember" abstract="true" name="A2022EmployeeStockPurchasePlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="oust_ShareBasedCompensationArrangementByShareBasedPaymentAwardPurchasePeriod" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardPurchasePeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="oust_NumeratorAbstract" abstract="true" name="NumeratorAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="oust_RSURSAAndPerformanceBasedAwardsMember" abstract="true" name="RSURSAAndPerformanceBasedAwardsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="oust_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedShortTermInvestments" abstract="false" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedShortTermInvestments" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="oust_ClassOfWarrantOrRightUnvestedWarrantsNumberOfCommonSharesRepresented" abstract="false" name="ClassOfWarrantOrRightUnvestedWarrantsNumberOfCommonSharesRepresented" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="oust_ClassOfWarrantOrRightVestingBasisPaymentsByCounterpartyForGoodsAndServicesMaximum" abstract="false" name="ClassOfWarrantOrRightVestingBasisPaymentsByCounterpartyForGoodsAndServicesMaximum" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="oust_CustomerBMember" abstract="true" name="CustomerBMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="oust_DebtInstrumentPrepaymentScenarioDomain" abstract="true" name="DebtInstrumentPrepaymentScenarioDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="oust_AmazoncomNVInvestmentHoldingsLLLCMember" abstract="true" name="AmazoncomNVInvestmentHoldingsLLLCMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="oust_InterestRateSubjectToFinancialCovenantMember" abstract="true" name="InterestRateSubjectToFinancialCovenantMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="oust_DevelopedTechnologyHardwareMember" abstract="true" name="DevelopedTechnologyHardwareMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="oust_SponsorMember" abstract="true" name="SponsorMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="oust_PublicAndPrivateCommonStockWarrantsMember" abstract="true" name="PublicAndPrivateCommonStockWarrantsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="oust_ShareBasedCompensationExpenseAdjustmentMember" abstract="true" name="ShareBasedCompensationExpenseAdjustmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="oust_DebtInstrumentCapitalizedEndOfTermFee" abstract="false" name="DebtInstrumentCapitalizedEndOfTermFee" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="oust_CashCashEquivalentsAndRestrictedCashUninsuredAmount" abstract="false" name="CashCashEquivalentsAndRestrictedCashUninsuredAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="oust_ProfessionalServicesVendorAMember" abstract="true" name="ProfessionalServicesVendorAMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="oust_FairValueAdjustmentToIntangibleAssetsMember" abstract="true" name="FairValueAdjustmentToIntangibleAssetsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="oust_InterestRateScenarioDomain" abstract="true" name="InterestRateScenarioDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="oust_BusinessCombinationConsiderationTransferredNumberOfWarrantsAcquired" abstract="false" name="BusinessCombinationConsiderationTransferredNumberOfWarrantsAcquired" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="oust_DebtInstrumentEndOfTermChargePercentage" abstract="false" name="DebtInstrumentEndOfTermChargePercentage" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="oust_AdjustmentToExpensesRelatedToVestingOfWarrantMember" abstract="true" name="AdjustmentToExpensesRelatedToVestingOfWarrantMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="oust_AmazonWarrantCommonStockVestedMember" abstract="true" name="AmazonWarrantCommonStockVestedMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="oust_ShareBasedCompensationArrangementByShareBasedPaymentAwardOfferingPeriod" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOfferingPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="oust_ClassOfWarrantOrRightNumberOfWarrantsVested" abstract="false" name="ClassOfWarrantOrRightNumberOfWarrantsVested" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="oust_ReceivableFromContractManufacturerCurrent" abstract="false" name="ReceivableFromContractManufacturerCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="oust_ContractWithCustomerLiabilityNoncurrentOtherContractLiabilities" abstract="false" name="ContractWithCustomerLiabilityNoncurrentOtherContractLiabilities" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="oust_ClassOfWarrantOrRightExercisableThresholdPeriod" abstract="false" name="ClassOfWarrantOrRightExercisableThresholdPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="oust_NumberOfCurrentOrFormerDirectorsFiledAgainstInLawsuits" abstract="false" name="NumberOfCurrentOrFormerDirectorsFiledAgainstInLawsuits" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="oust_FiniteLivedIntangibleAssetExpectedAmortizationAfterYearFour" abstract="false" name="FiniteLivedIntangibleAssetExpectedAmortizationAfterYearFour" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="oust_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOperatingLeaseLiabilityCurrent" abstract="false" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOperatingLeaseLiabilityCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="oust_DenominatorAbstract" abstract="true" name="DenominatorAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="oust_ClassOfWarrantOrRightExercisableThresholdTradingDayPeriod" abstract="false" name="ClassOfWarrantOrRightExercisableThresholdTradingDayPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="oust_BusinessCombinationConsiderationTransferredWarrantsAndRightsAssumed" abstract="false" name="BusinessCombinationConsiderationTransferredWarrantsAndRightsAssumed" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="oust_ContractWithCustomerLiabilityCurrentAbstract" abstract="true" name="ContractWithCustomerLiabilityCurrentAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="oust_AggregateIntrinsicValueRollForward" abstract="true" name="AggregateIntrinsicValueRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="oust_ContractWithCustomerLiabilityNoncurrentDeferredRevenue" abstract="false" name="ContractWithCustomerLiabilityNoncurrentDeferredRevenue" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="oust_ClassOfWarrantOrRightExercisableThresholdCommonStockPriceForRedemption" abstract="false" name="ClassOfWarrantOrRightExercisableThresholdCommonStockPriceForRedemption" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types1:perShareItemType"/>
  <xs:element id="oust_LineOfCreditFacilityAdditionalBorrowingCapacityForfeited" abstract="false" name="LineOfCreditFacilityAdditionalBorrowingCapacityForfeited" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="oust_OtherOperatingRealEstateLeasesMember" abstract="true" name="OtherOperatingRealEstateLeasesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="oust_AmazonWarrantCommonStockUnvestedMember" abstract="true" name="AmazonWarrantCommonStockUnvestedMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="oust_StockCancelledDuringPeriodSharesAcquisitions" abstract="false" name="StockCancelledDuringPeriodSharesAcquisitions" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="oust_ShareBasedPaymentArrangementNumberOfEquityIncentivePlans" abstract="false" name="ShareBasedPaymentArrangementNumberOfEquityIncentivePlans" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="oust_ExercisePriceRangeOneMember" abstract="true" name="ExercisePriceRangeOneMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="oust_SaleOfStockIssuanceCost" abstract="false" name="SaleOfStockIssuanceCost" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="oust_DebtInstrumentPrepaymentMadeAfter24MonthsFollowingTheClosingDateMember" abstract="true" name="DebtInstrumentPrepaymentMadeAfter24MonthsFollowingTheClosingDateMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="oust_InterestRateScenarioAxis" abstract="true" name="InterestRateScenarioAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="oust_LesseeOperatingLeaseScheduleOfWeightedAverageRemainingLeaseTermAndDiscountRateTableTextBlock" abstract="false" name="LesseeOperatingLeaseScheduleOfWeightedAverageRemainingLeaseTermAndDiscountRateTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="oust_NumberOfOtherEntitiesFiledAgainstInLawsuits" abstract="false" name="NumberOfOtherEntitiesFiledAgainstInLawsuits" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="oust_DebtInstrumentPrepaymentScenarioAxis" abstract="true" name="DebtInstrumentPrepaymentScenarioAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="oust_ClassOfWarrantOrRightVestingOfWarrantUponAcquisitionPercent" abstract="false" name="ClassOfWarrantOrRightVestingOfWarrantUponAcquisitionPercent" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="oust_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccruedAndOtherCurrentLiabilities" abstract="false" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccruedAndOtherCurrentLiabilities" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="oust_CashCashEquivalentsAndRestrictedCashFDICInsuredAmount" abstract="false" name="CashCashEquivalentsAndRestrictedCashFDICInsuredAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="oust_ConversionOfCLAUnitsToPublicWarrantMember" abstract="true" name="ConversionOfCLAUnitsToPublicWarrantMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="oust_ConversionOfCLAUnitsToOusterCommonStockMember" abstract="true" name="ConversionOfCLAUnitsToOusterCommonStockMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="oust_VelodyneLidarIncMember" abstract="true" name="VelodyneLidarIncMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="oust_SeverancePaymentsAdjustmentsMember" abstract="true" name="SeverancePaymentsAdjustmentsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="oust_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedContractWithCustomerLiabilityNoncurrent" abstract="false" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedContractWithCustomerLiabilityNoncurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="oust_ContractWithCustomerLiabilityCurrentOtherContractLiabilities" abstract="false" name="ContractWithCustomerLiabilityCurrentOtherContractLiabilities" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="oust_UninvoicedReceiptsOtherCurrentLiabilities" abstract="false" name="UninvoicedReceiptsOtherCurrentLiabilities" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="oust_PrivatePlacementWarrantLiabilityMember" abstract="true" name="PrivatePlacementWarrantLiabilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="oust_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsUnvestedEarlyExercisedCommonStockOptionsMember" abstract="true" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsUnvestedEarlyExercisedCommonStockOptionsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="oust_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedContractWithCustomerAssetAfterAllowanceForCreditLossNoncurrent" abstract="false" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedContractWithCustomerAssetAfterAllowanceForCreditLossNoncurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="oust_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsCancellationsWeightedAverageGrantDateFairValue" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsCancellationsWeightedAverageGrantDateFairValue" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:perShareItemType"/>
  <xs:element id="oust_InterestRateNotSubjectToFinancialCovenantMember" abstract="true" name="InterestRateNotSubjectToFinancialCovenantMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="oust_ColonnadeAcquisitionCorpMember" abstract="true" name="ColonnadeAcquisitionCorpMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="oust_HeadquartersLocatedInSanFranciscoCaliforniaMember" abstract="true" name="HeadquartersLocatedInSanFranciscoCaliforniaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="oust_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOptionsToPurchaseCommonStockMember" abstract="true" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOptionsToPurchaseCommonStockMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="oust_AdjustmentToRevenueRelatedToVestingOfWarrantMember" abstract="true" name="AdjustmentToRevenueRelatedToVestingOfWarrantMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="oust_SupplierBMember" abstract="true" name="SupplierBMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="oust_AccruedAndOtherLiabilitiesCurrent" abstract="false" name="AccruedAndOtherLiabilitiesCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
</xs:schema>
