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<!-- Creation Date :2023-03-16T15:50:45.7245+00:00 -->
<!-- Copyright (c) 2023 Donnelly Financial Solutions, Inc. All Rights Reserved. -->
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  <xsd:element id="ater_BusinessCombinationConsiderationTransferredValueOfCertainInventory" name="BusinessCombinationConsiderationTransferredValueOfCertainInventory" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ater_BusinessCombinationContingentConsiderationArrangementsEarnOutMaximum" name="BusinessCombinationContingentConsiderationArrangementsEarnOutMaximum" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ater_BusinessCombinationContingentConsiderationChangeInFairValueOfContingentEarnOutLiabilities" name="BusinessCombinationContingentConsiderationChangeInFairValueOfContingentEarnOutLiabilities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ater_BusinessCombinationContingentConsiderationContributionMarginRatio" name="BusinessCombinationContingentConsiderationContributionMarginRatio" type="xbrli:pureItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ater_BusinessCombinationContingentConsiderationEarnoutFairValue" name="BusinessCombinationContingentConsiderationEarnoutFairValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ater_BusinessCombinationContingentConsiderationEarnOutGeneratedAmount" name="BusinessCombinationContingentConsiderationEarnOutGeneratedAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ater_BusinessCombinationContingentConsiderationEarnOutMargin" name="BusinessCombinationContingentConsiderationEarnOutMargin" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ater_BusinessCombinationContingentConsiderationEntitledToReceiveAmountInCashEqualToShares" name="BusinessCombinationContingentConsiderationEntitledToReceiveAmountInCashEqualToShares" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ater_BusinessCombinationContingentConsiderationSubjectToCap" name="BusinessCombinationContingentConsiderationSubjectToCap" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ater_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCommonStockSharesIssued" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCommonStockSharesIssued" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ater_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedFiniteLivedIntangiblesAndGoodwill" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedFiniteLivedIntangiblesAndGoodwill" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ater_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedTransitionServicesPayments" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedTransitionServicesPayments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ater_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedWorkingCapitalAdjustment" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedWorkingCapitalAdjustment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ater_CashDepositsAtFinancialInstitutionsInExcessOfInsuredAmount" name="CashDepositsAtFinancialInstitutionsInExcessOfInsuredAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ater_ChangeInFairValueOfWarrantLiability" name="ChangeInFairValueOfWarrantLiability" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ater_ClassOfWarrantExercisableToCommonStockPercentage" name="ClassOfWarrantExercisableToCommonStockPercentage" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ater_ClassOfWarrantOrRightsConvertibleConsecutiveTradingDays" name="ClassOfWarrantOrRightsConvertibleConsecutiveTradingDays" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ater_ClassOfWarrantsOrRightsExercisableTerm" name="ClassOfWarrantsOrRightsExercisableTerm" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ater_CommonStockIssuedSubjectToSatisfyObligationToRepayAccelerationAmount" name="CommonStockIssuedSubjectToSatisfyObligationToRepayAccelerationAmount" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="ater_ConsultingFees" name="ConsultingFees" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ater_ContingentConsiderationEarnOutPayments" name="ContingentConsiderationEarnOutPayments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ater_CorporateAlternativeMinimumTax" name="CorporateAlternativeMinimumTax" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ater_DebtInstrumentDebtDefaultDescriptionOfCurrentEventOfDefaultAccelerationPayment" name="DebtInstrumentDebtDefaultDescriptionOfCurrentEventOfDefaultAccelerationPayment" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ater_DebtInstrumentMaturityMonthAndYear" name="DebtInstrumentMaturityMonthAndYear" type="xbrli:gYearMonthItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ater_DebtOffsetAgainstAndExpenseOverTerm" name="DebtOffsetAgainstAndExpenseOverTerm" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ater_DebtOriginalIssueDiscount" name="DebtOriginalIssueDiscount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ater_DeferredTaxAssetsIntangibles" name="DeferredTaxAssetsIntangibles" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ater_DeferredTaxAssetsStockOptions" name="DeferredTaxAssetsStockOptions" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ater_DeferredTaxAssetsTaxDeferredExpenseInterestExpenseLimitation" name="DeferredTaxAssetsTaxDeferredExpenseInterestExpenseLimitation" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ater_DeferredTaxLiabilitiesContingentConsideration" name="DeferredTaxLiabilitiesContingentConsideration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ater_DeferredTaxLiabilitiesNetOfValuationAllowance" name="DeferredTaxLiabilitiesNetOfValuationAllowance" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ater_DiscountAssociatedWithIssuanceOfWarrants" name="DiscountAssociatedWithIssuanceOfWarrants" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ater_DiscountAssociatedWithOriginalIssuanceOfLoan" name="DiscountAssociatedWithOriginalIssuanceOfLoan" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ater_DiscountOfDebtRelatingToWarrantsIssuance" name="DiscountOfDebtRelatingToWarrantsIssuance" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ater_EntitledToPayableNumberOfSharesOfCommonStock" name="EntitledToPayableNumberOfSharesOfCommonStock" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ater_EntitledToReceiveNumberOfSharesOfCommonStock" name="EntitledToReceiveNumberOfSharesOfCommonStock" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ater_EquityFundraisingCostsNotPaid" name="EquityFundraisingCostsNotPaid" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ater_ExciseTax" name="ExciseTax" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ater_ExerciseOfPreFundedWarrants" name="ExerciseOfPreFundedWarrants" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ater_ExerciseOfPrefundedWarrantsShares" name="ExerciseOfPrefundedWarrantsShares" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ater_ExerciseOfPrefundedWarrantsValue" name="ExerciseOfPrefundedWarrantsValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ater_FairValueOfWarrantModificationOnExtinguishment" name="FairValueOfWarrantModificationOnExtinguishment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ater_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFour" name="FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFour" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ater_GainInConnectionWithSettlementOfNotePayable" name="GainInConnectionWithSettlementOfNotePayable" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ater_GainLossInConnectionWithSettlementOfEarnout" name="GainLossInConnectionWithSettlementOfEarnout" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ater_GainLossOnExtinguishmentOfSellerNote" name="GainLossOnExtinguishmentOfSellerNote" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ater_GainLossOnInitialIssuanceOfEquity" name="GainLossOnInitialIssuanceOfEquity" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ater_HighTrialWarrant" name="HighTrialWarrant" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ater_IncomeTaxBenefitRecognitionCriteriaPercentageThreshold" name="IncomeTaxBenefitRecognitionCriteriaPercentageThreshold" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ater_IncomeTaxRateReconciliationChangeInFairValueContingentConsideration" name="IncomeTaxRateReconciliationChangeInFairValueContingentConsideration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ater_IncomeTaxRateReconciliationDebtExtinguishment" name="IncomeTaxRateReconciliationDebtExtinguishment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ater_IncomeTaxRateReconciliationPermanentDifferences" name="IncomeTaxRateReconciliationPermanentDifferences" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ater_IncomeTaxRateReconciliationStockCompensation" name="IncomeTaxRateReconciliationStockCompensation" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ater_IncomeTaxRateReconciliationWarrantLiabilities" name="IncomeTaxRateReconciliationWarrantLiabilities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ater_IncreaseDecreaseInAccountsPayableAccruedAndOtherLiabilities" name="IncreaseDecreaseInAccountsPayableAccruedAndOtherLiabilities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ater_InitialIssuanceOfEquity" name="InitialIssuanceOfEquity" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ater_IntangiblesIndefiniteLife" name="IntangiblesIndefiniteLife" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ater_IssuanceOfCommonStock" name="IssuanceOfCommonStock" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ater_IssuanceOfCommonStockForSettlementOfSellerNote" name="IssuanceOfCommonStockForSettlementOfSellerNote" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ater_IssuanceOfCommonStockHealingSolutionsEarnoutSettlement" name="IssuanceOfCommonStockHealingSolutionsEarnoutSettlement" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ater_IssuanceOfCommonStockInConnectionWithAcquisition" name="IssuanceOfCommonStockInConnectionWithAcquisition" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ater_IssuanceOfCommonStockInConnectionWithAcquisitions" name="IssuanceOfCommonStockInConnectionWithAcquisitions" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ater_IssuanceOfCommonStockRelatedToExerciseOfWarrants" name="IssuanceOfCommonStockRelatedToExerciseOfWarrants" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ater_IssuanceOfRestrictedStockAwards" name="IssuanceOfRestrictedStockAwards" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ater_IssuanceOfRestrictedStockAwardsShares" name="IssuanceOfRestrictedStockAwardsShares" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ater_IssuanceOfWarrantsInConnectionWithOffering" name="IssuanceOfWarrantsInConnectionWithOffering" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ater_IssuanceOfWarrantsToContractors" name="IssuanceOfWarrantsToContractors" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ater_IssuanceOfWarrantsToHighTrailValue" name="IssuanceOfWarrantsToHighTrailValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ater_IssuanceOfWarrantsToMidcap" name="IssuanceOfWarrantsToMidcap" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ater_LineOfCreditFacilityAggregatePrincipalAmount" name="LineOfCreditFacilityAggregatePrincipalAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ater_LineOfCreditFacilityAndTermLoanInterestExpense" name="LineOfCreditFacilityAndTermLoanInterestExpense" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ater_LineOfCreditFacilityCovenantMinimumLiquidityRequirementInUnrestrictedCashOnHand" name="LineOfCreditFacilityCovenantMinimumLiquidityRequirementInUnrestrictedCashOnHand" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ater_LineOfCreditFacilityFinancialCovenantMinimumLiquidityRequirementInCashOnHand" name="LineOfCreditFacilityFinancialCovenantMinimumLiquidityRequirementInCashOnHand" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ater_LineOfCreditFacilityMaximumFutureIncreaseBorrowingCapacityAmount" name="LineOfCreditFacilityMaximumFutureIncreaseBorrowingCapacityAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ater_LineOfCreditFacilityMaximumLiquidityRequirementsAtAllOtherTimes" name="LineOfCreditFacilityMaximumLiquidityRequirementsAtAllOtherTimes" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ater_LineOfCreditFacilityMaximumLiquidityRequirementsDuringPeriod" name="LineOfCreditFacilityMaximumLiquidityRequirementsDuringPeriod" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ater_LineOfCreditFacilityMinimumBorrowingCapacity" name="LineOfCreditFacilityMinimumBorrowingCapacity" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ater_LineOfCreditFacilityNumberOfInstallments" name="LineOfCreditFacilityNumberOfInstallments" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ater_LinesOfCreditGrossCurrent" name="LinesOfCreditGrossCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ater_LitigationSettlementAmountPayableToOtherParty" name="LitigationSettlementAmountPayableToOtherParty" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ater_LitigationSettlementCouponsAwarded" name="LitigationSettlementCouponsAwarded" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ater_LitigationSettlementInCash" name="LitigationSettlementInCash" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ater_LoansPayableGross" name="LoansPayableGross" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ater_LongTermLoansRelatedToWarrant" name="LongTermLoansRelatedToWarrant" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ater_LossFromDerivativeLiabilityDiscountRelatedToTermLoan" name="LossFromDerivativeLiabilityDiscountRelatedToTermLoan" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ater_LossOnInitialIssuanceOfWarrant" name="LossOnInitialIssuanceOfWarrant" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ater_ModificationOfWarrantsBetweenEquityAndLiability" name="ModificationOfWarrantsBetweenEquityAndLiability" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ater_NonCashBarterExchangeOfInventoryForAdvertisingLogisticsCredits" name="NonCashBarterExchangeOfInventoryForAdvertisingLogisticsCredits" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ater_NonCashConsiderationPaidToContractors" name="NonCashConsiderationPaidToContractors" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ater_NonCashFairValueOfContingentConsiderations" name="NonCashFairValueOfContingentConsiderations" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ater_NonCashInitialIssuanceOfEquity" name="NonCashInitialIssuanceOfEquity" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ater_NonCashIssuanceOfCommonStock" name="NonCashIssuanceOfCommonStock" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ater_NotesExtinguishedInExchangeForDebtRepayment" name="NotesExtinguishedInExchangeForDebtRepayment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ater_NumberOfCustomerAccountedForTenPercentOrMoreOfAccountsReceivable" name="NumberOfCustomerAccountedForTenPercentOrMoreOfAccountsReceivable" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ater_NumberOfCustomerAccountedForTenPercentOrMoreOfRevenue" name="NumberOfCustomerAccountedForTenPercentOrMoreOfRevenue" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ater_NumberOfInstallments" name="NumberOfInstallments" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ater_OperatingLeaseRightOfUseAssetCurrent" name="OperatingLeaseRightOfUseAssetCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ater_OperatingLeaseRightOfUseAssetNonCurrent" name="OperatingLeaseRightOfUseAssetNonCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ater_OperatingLossCarryForwardExpirationYear" name="OperatingLossCarryForwardExpirationYear" type="xbrli:gYearItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ater_OtherOfferingExpenses" name="OtherOfferingExpenses" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ater_PaymentForTransitionServices" name="PaymentForTransitionServices" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ater_PaymentInCashOfCurrentEventOfDefaultAccelerationAmount" name="PaymentInCashOfCurrentEventOfDefaultAccelerationAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ater_PaymentInSharesOfCurrentEventOfDefaultAccelerationAmount" name="PaymentInSharesOfCurrentEventOfDefaultAccelerationAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ater_PaymentInSharesOfCurrentEventOfDefaultAccelerationShares" name="PaymentInSharesOfCurrentEventOfDefaultAccelerationShares" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="ater_PaymentsForPurchaseOfFixedAssets" name="PaymentsForPurchaseOfFixedAssets" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ater_PaymentsOfInsuranceObligationFinancingActivities" name="PaymentsOfInsuranceObligationFinancingActivities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ater_PayrollRelatedCreditsCOVID19" name="PayrollRelatedCreditsCOVID19" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ater_PercentageOfChangeInStockBasedCompensationExpense" name="PercentageOfChangeInStockBasedCompensationExpense" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ater_PercentageOfInvestmentTaxCredit" name="PercentageOfInvestmentTaxCredit" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ater_PercentageOfVotingPowerOfCapitalStockOutstanding" name="PercentageOfVotingPowerOfCapitalStockOutstanding" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ater_PrepaidInventory" name="PrepaidInventory" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ater_PrepaymentFeePercentage" name="PrepaymentFeePercentage" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ater_ProceedsFromCancellationOfWarrant" name="ProceedsFromCancellationOfWarrant" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ater_ProceedsFromInsuranceFinancingActivities" name="ProceedsFromInsuranceFinancingActivities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ater_ProceedsFromIssuanceOfCommonStockFollowOnPublicOfferingNetOfIssuanceCosts" name="ProceedsFromIssuanceOfCommonStockFollowOnPublicOfferingNetOfIssuanceCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ater_ProceedsFromPaymentsForStockOptionsExercised" name="ProceedsFromPaymentsForStockOptionsExercised" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ater_ProceedsToBeReceivedFromSettlementAgreement" name="ProceedsToBeReceivedFromSettlementAgreement" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ater_ProductRelatedAccruals" name="ProductRelatedAccruals" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ater_ProvisionForBarterCredits" name="ProvisionForBarterCredits" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ater_ProvisionForSalesReturns" name="ProvisionForSalesReturns" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ater_ReclassificationFromComponentOfEquityToLiability" name="ReclassificationFromComponentOfEquityToLiability" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ater_ReclassificationFromLiabilityToComponentOfEquity" name="ReclassificationFromLiabilityToComponentOfEquity" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ater_ReclassificationOfWarrantsToLiability" name="ReclassificationOfWarrantsToLiability" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ater_RepaymentsOfDebtAfterAcceleratedPrincipalAddition" name="RepaymentsOfDebtAfterAcceleratedPrincipalAddition" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ater_SalesReturnReserve" name="SalesReturnReserve" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ater_SettlementChargeOfContingentEarnoutLiability" name="SettlementChargeOfContingentEarnoutLiability" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ater_ShareBasedCompensationArrangementByShareBasedPaymentAwardVestingDate" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardVestingDate" type="xbrli:dateItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ater_SharesOfRestrictedCommonStockRetiredInConnectionWithVestingShares" name="SharesOfRestrictedCommonStockRetiredInConnectionWithVestingShares" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ater_ShippingAndHandlingCosts" name="ShippingAndHandlingCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ater_StockBasedCompensationExpenseChangeInAmount" name="StockBasedCompensationExpenseChangeInAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ater_StockIssuedDuringPeriodSharesCommonStock" name="StockIssuedDuringPeriodSharesCommonStock" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ater_StockIssuedDuringPeriodSharesCommonStockUponExerciseOfStockOptionGrants" name="StockIssuedDuringPeriodSharesCommonStockUponExerciseOfStockOptionGrants" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ater_StockIssuedDuringPeriodShareWarrantsExercised" name="StockIssuedDuringPeriodShareWarrantsExercised" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ater_StockIssuedDuringPeriodValueCommonStock" name="StockIssuedDuringPeriodValueCommonStock" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ater_StockIssuedDuringPeriodValueCommonStockUponExerciseOfStockOptionGrants" name="StockIssuedDuringPeriodValueCommonStockUponExerciseOfStockOptionGrants" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ater_StockIssuedDuringPeriodValueWarrantsExercised" name="StockIssuedDuringPeriodValueWarrantsExercised" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ater_SubstantialDoubtAboutGoingConcernAccessibleBorrowingsUnderOurCreditFacility" name="SubstantialDoubtAboutGoingConcernAccessibleBorrowingsUnderOurCreditFacility" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ater_SubstantialDoubtAboutGoingConcernAccumulatedDeficit" name="SubstantialDoubtAboutGoingConcernAccumulatedDeficit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ater_SubstantialDoubtAboutGoingConcernCashAndCashEquivalents" name="SubstantialDoubtAboutGoingConcernCashAndCashEquivalents" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ater_SubstantialDoubtAboutGoingConcernNetCashUsedInOperatingActivities" name="SubstantialDoubtAboutGoingConcernNetCashUsedInOperatingActivities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ater_SubstantialDoubtAboutGoingConcernNetLoss" name="SubstantialDoubtAboutGoingConcernNetLoss" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ater_SubstantialDoubtAboutGoingConcernUnrestrictedCashAndCashEquivalents" name="SubstantialDoubtAboutGoingConcernUnrestrictedCashAndCashEquivalents" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ater_UnderwritingDiscountsAndCommissions" name="UnderwritingDiscountsAndCommissions" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ater_WarrantAmendmentConditionDescription" name="WarrantAmendmentConditionDescription" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ater_WarrantLiabilityCurrent" name="WarrantLiabilityCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ater_WarrantsPriorToDay" name="WarrantsPriorToDay" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ater_WithheldOfCashPurchasePricePaymentPeriod" name="WithheldOfCashPurchasePricePaymentPeriod" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ater_WithheldOfCashPurchasePriceToServeCollateralForSellersPayment" name="WithheldOfCashPurchasePriceToServeCollateralForSellersPayment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ater_CommitmentAndContingenciesLineItems" name="CommitmentAndContingenciesLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_DisclosureOfGoodwillAndIntangibleAssetsLineItems" name="DisclosureOfGoodwillAndIntangibleAssetsLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_IncomeTaxesDisclosureLineItems" name="IncomeTaxesDisclosureLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_OrganizationAndDescriptionOfBusinessLineItems" name="OrganizationAndDescriptionOfBusinessLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_SignificantAccountingPoliciesLineItems" name="SignificantAccountingPoliciesLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_StockholdersEquityLineItems" name="StockholdersEquityLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_AccreditedPurchasersMember" name="AccreditedPurchasersMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_AccruedLiabilityMember" name="AccruedLiabilityMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_AfterFifteenMonthsFollowingClosingDateMember" name="AfterFifteenMonthsFollowingClosingDateMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_AfterNineMonthsButBeforeTwelveMonthsFollowingClosingDateMember" name="AfterNineMonthsButBeforeTwelveMonthsFollowingClosingDateMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_AfterTwelveMonthsButBeforeFifteenMonthsFollowingClosingDateMember" name="AfterTwelveMonthsButBeforeFifteenMonthsFollowingClosingDateMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_AmazonMember" name="AmazonMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_AprilLetterAgreementMember" name="AprilLetterAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_AssetBackedCreditAgreementMember" name="AssetBackedCreditAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_AssetPurchaseAgreementMember" name="AssetPurchaseAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_AterianTwoThousandFourteenPlanMember" name="AterianTwoThousandFourteenPlanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_AugustTenTwoThousandTwentyOneMember" name="AugustTenTwoThousandTwentyOneMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_AugustTwoThousandAndTwentyMember" name="AugustTwoThousandAndTwentyMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_AussieHealthAssetsMember" name="AussieHealthAssetsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_AussieHealthMember" name="AussieHealthMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_CommonStockWarrantMember" name="CommonStockWarrantMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_ComputerEquipmentAndSoftwareMember" name="ComputerEquipmentAndSoftwareMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_ContingentEarnOutConsiderationMember" name="ContingentEarnOutConsiderationMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_CookwareKitchenToolsAndGadgetsMember" name="CookwareKitchenToolsAndGadgetsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_DecemberFourteenTwoThousandTwentyOneMember" name="DecemberFourteenTwoThousandTwentyOneMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_DecemberSeventeenTwoThousandTwentyOneMember" name="DecemberSeventeenTwoThousandTwentyOneMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_EssentialOilsAndRelatedAccessoriesMember" name="EssentialOilsAndRelatedAccessoriesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_EventOccursInNineMonthsFollowingClosingDateMember" name="EventOccursInNineMonthsFollowingClosingDateMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_EventOccursInTwelveMonthsEndedTwelveThirtyOneTwentyTwentyOneMember" name="EventOccursInTwelveMonthsEndedTwelveThirtyOneTwentyTwentyOneMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_FebruaryWarrantPennyWarrantAndAdditionalWarrantMember" name="FebruaryWarrantPennyWarrantAndAdditionalWarrantMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_FirstAnniversaryMember" name="FirstAnniversaryMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_FirstPaymentMember" name="FirstPaymentMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_FollowOnPublicOfferingMember" name="FollowOnPublicOfferingMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_FurnitureFixtureAndEquipmentMember" name="FurnitureFixtureAndEquipmentMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_HealingSolutionsAndPhotoPaperDirectMember" name="HealingSolutionsAndPhotoPaperDirectMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_HealingSolutionsLLCMember" name="HealingSolutionsLLCMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_HealthAndBeautyMember" name="HealthAndBeautyMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_HeatingCoolingAndAirQualityMember" name="HeatingCoolingAndAirQualityMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_HighTrailApril2021NoteMember" name="HighTrailApril2021NoteMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_HighTrailApril2021TermLoanMember" name="HighTrailApril2021TermLoanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_HighTrailApril2022NoteMember" name="HighTrailApril2022NoteMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_HighTrailApril2022TermLoanMember" name="HighTrailApril2022TermLoanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_HighTrailAprilTwoThousandAndTwentyTwoNotesRepaymentMember" name="HighTrailAprilTwoThousandAndTwentyTwoNotesRepaymentMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_HighTrailDebtRepaymentMember" name="HighTrailDebtRepaymentMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_HighTrailDecember2020AndFebruary2021NoteMember" name="HighTrailDecember2020AndFebruary2021NoteMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_HighTrailDecember2020NoteAndFebruary2021TermLoanMember" name="HighTrailDecember2020NoteAndFebruary2021TermLoanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_HighTrailDecember2021NoteAndFebruary2022NoteMember" name="HighTrailDecember2021NoteAndFebruary2022NoteMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_HighTrailDecember2021NoteAndFebruary2022TermLoanMember" name="HighTrailDecember2021NoteAndFebruary2022TermLoanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_HighTrailDecember2021NoteMember" name="HighTrailDecember2021NoteMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_HighTrailDecember2022NoteMember" name="HighTrailDecember2022NoteMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_HighTrailFebruary2021NoteMember" name="HighTrailFebruary2021NoteMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_HighTrailFebruary2022NoteMember" name="HighTrailFebruary2022NoteMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_HighTrailLoanDecember2020NoteMember" name="HighTrailLoanDecember2020NoteMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_HighTrailMember" name="HighTrailMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_HighTrailTermLoanMember" name="HighTrailTermLoanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_HomeOfficeMember" name="HomeOfficeMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_HorizonTermLoanMember" name="HorizonTermLoanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_HousewaresMember" name="HousewaresMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_InsidersMember" name="InsidersMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_InventoryAndOtherWorkingCapitalAssetsIncludingCashOnHandMember" name="InventoryAndOtherWorkingCapitalAssetsIncludingCashOnHandMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_InventoryMember" name="InventoryMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_JulyThirteenTwoThousandTwentyOneMember" name="JulyThirteenTwoThousandTwentyOneMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_JulyTwentyTwoThousandTwentyOneMember" name="JulyTwentyTwoThousandTwentyOneMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_JuneThirtyTwoThousandTwentyOneMember" name="JuneThirtyTwoThousandTwentyOneMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_JuneTwelveTwoThousandAndTwentyMember" name="JuneTwelveTwoThousandAndTwentyMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_KitchenAppliancesMember" name="KitchenAppliancesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_LeaseholdImprovementsAndCapitalLeaseMember" name="LeaseholdImprovementsAndCapitalLeaseMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_LetterAgreementsMember" name="LetterAgreementsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_ManagedPlatformAsAServiceMember" name="ManagedPlatformAsAServiceMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_MarchTwelveTwoThousandTwentyOneMember" name="MarchTwelveTwoThousandTwentyOneMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_MarchTwentyTwoThousandAndTwentyMember" name="MarchTwentyTwoThousandAndTwentyMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_MaySeventeenTwoThousandAndTwentyMember" name="MaySeventeenTwoThousandAndTwentyMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_MidCapCreditFacilityMember" name="MidCapCreditFacilityMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_MuellerAustriaMember" name="MuellerAustriaMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_NineMonthsFollowingClosingDateMember" name="NineMonthsFollowingClosingDateMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_NovemberSixteenTwoThousandTwentyOneMember" name="NovemberSixteenTwoThousandTwentyOneMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_NovemberTwoThousandAndTwentyMember" name="NovemberTwoThousandAndTwentyMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_OtherMember" name="OtherMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_OtherThanNorthAmericaMember" name="OtherThanNorthAmericaMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_OverThirtySixMonthsMember" name="OverThirtySixMonthsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_OverTwentyFourMonthsMember" name="OverTwentyFourMonthsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_PersonalProtectiveEquipmentMember" name="PersonalProtectiveEquipmentMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_PhotoPaperDirectLTDMember" name="PhotoPaperDirectLTDMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_PrefundedWarrantsMember" name="PrefundedWarrantsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_ProductRevenueMember" name="ProductRevenueMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_RealPropertyMember" name="RealPropertyMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_RestrictedCashMember" name="RestrictedCashMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_SabbyVolatilityWarrantMasterFundLtdMember" name="SabbyVolatilityWarrantMasterFundLtdMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_SalesAndDistributionExpensesMember" name="SalesAndDistributionExpensesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_SecondPaymentMember" name="SecondPaymentMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_SecuritiesClassActionMember" name="SecuritiesClassActionMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_SecuritiesPurchaseAgreementMember" name="SecuritiesPurchaseAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_SellersBrokersMember" name="SellersBrokersMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_SeniorSecuredNoteMember" name="SeniorSecuredNoteMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_SeniorSecuredPromissoryNotesMember" name="SeniorSecuredPromissoryNotesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_SeptemberThirtyTwoThousandTwentyOneMember" name="SeptemberThirtyTwoThousandTwentyOneMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_SettlementAgreementMember" name="SettlementAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_ShareBasedCompensationAwardTrancheFourVestingDateOneMember" name="ShareBasedCompensationAwardTrancheFourVestingDateOneMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_ShareBasedCompensationAwardTrancheFourVestingDateTwoMember" name="ShareBasedCompensationAwardTrancheFourVestingDateTwoMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_ShareBasedCompensationAwardTrancheThreeVestingDateOneMember" name="ShareBasedCompensationAwardTrancheThreeVestingDateOneMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_ShareBasedCompensationAwardTrancheThreeVestingDateTwoMember" name="ShareBasedCompensationAwardTrancheThreeVestingDateTwoMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_ShareholderDerivativeActionsRelatedToSecuritiesClassActionMember" name="ShareholderDerivativeActionsRelatedToSecuritiesClassActionMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_SmashAssetsMember" name="SmashAssetsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_SmashMember" name="SmashMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_SPAAmendmentMember" name="SPAAmendmentMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_SquattyPottyLLCMember" name="SquattyPottyLLCMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_StepAndGoHealthLlcMember" name="StepAndGoHealthLlcMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_StepAndGoMember" name="StepAndGoMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_StipulationMember" name="StipulationMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_TerminatedCreditAgreementMember" name="TerminatedCreditAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_ThirdPaymentMember" name="ThirdPaymentMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_TransitionServicesAgreementMember" name="TransitionServicesAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_TruweoAssetsMember" name="TruweoAssetsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_TruweoAssetsOneMember" name="TruweoAssetsOneMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_TwoThousandEighteenEquityIncentivePlanMember" name="TwoThousandEighteenEquityIncentivePlanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_TwoThousandNineteenEquityPlanMember" name="TwoThousandNineteenEquityPlanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_TwoThousandTwentyEquityPlanMember" name="TwoThousandTwentyEquityPlanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_TwoThousandTwentyTwoInducementEquityIncentivePlanMember" name="TwoThousandTwentyTwoInducementEquityIncentivePlanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_VotingAgreementMember" name="VotingAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_WarrantLiabilityMember" name="WarrantLiabilityMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_WorkingCapitalMember" name="WorkingCapitalMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_YearOneEarnOutMember" name="YearOneEarnOutMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_YearTwoEarnOutMember" name="YearTwoEarnOutMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_ZeroPercentageCouponSeniorSecuredPromissoryNoteMember" name="ZeroPercentageCouponSeniorSecuredPromissoryNoteMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_CommitmentAndContingenciesTable" name="CommitmentAndContingenciesTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_DisclosureOfGoodwillAndIntangibleAssetsTable" name="DisclosureOfGoodwillAndIntangibleAssetsTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_IncomeTaxesDisclosureTable" name="IncomeTaxesDisclosureTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_OrganizationAndDescriptionOfBusinessTable" name="OrganizationAndDescriptionOfBusinessTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_SignificantAccountingPoliciesTable" name="SignificantAccountingPoliciesTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_StockholdersEquityTable" name="StockholdersEquityTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ater_AccountingAndContingentConsiderationPolicyTextBlock" name="AccountingAndContingentConsiderationPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ater_AccountsReceivableDisclosureTextBlock" name="AccountsReceivableDisclosureTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ater_EstimatedUsefulLivesOfPropertyAndEquipmentTableTextBlock" name="EstimatedUsefulLivesOfPropertyAndEquipmentTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ater_GoodwillPolicyTextBlock" name="GoodwillPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ater_InventoriesAndCostOfGoodsSoldPolicyTextBlock" name="InventoriesAndCostOfGoodsSoldPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ater_PrepaidAndOtherCurrentAssetsTextBlock" name="PrepaidAndOtherCurrentAssetsTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ater_SalesAndDistributionPolicyTextBlock" name="SalesAndDistributionPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ater_ScheduleOfGoodwillAndFiniteLivedIntangibleAssetsAcquiredAsPartOfBusinessCombinationTableTextBlock" name="ScheduleOfGoodwillAndFiniteLivedIntangibleAssetsAcquiredAsPartOfBusinessCombinationTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ater_ScheduleOfPrepaidAndOtherCurrentAssetsTableTextBlock" name="ScheduleOfPrepaidAndOtherCurrentAssetsTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ater_ScheduleOfWarrantActivityTableTextBlock" name="ScheduleOfWarrantActivityTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
</xsd:schema>
