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        <link:definition>9955532 - Disclosure - Business Acquisitions - Summary of Pro Forma Consolidated Revenue and Net Income (Details)</link:definition>
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        <link:definition>9955534 - Disclosure - Business Acquisitions - Summary of Estimated Useful Lives for each acquired Intangible Asset (Details)</link:definition>
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        <link:definition>9955535 - Disclosure - Revenue - Summary of Revenues by Revenue Stream (Details)</link:definition>
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        <link:definition>9955536 - Disclosure - Revenue - Summary of Percentage of Domestic Revenue (Details)</link:definition>
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  <xs:element id="spsc_ScheduleOfSupplementalBalanceSheetInformationRelatedToLeasesTableTextBlock" abstract="false" name="ScheduleOfSupplementalBalanceSheetInformationRelatedToLeasesTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="spsc_ScheduleOfAccountingPoliciesTable" abstract="true" name="ScheduleOfAccountingPoliciesTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="spsc_InternallyDevelopedSoftwareMember" abstract="true" name="InternallyDevelopedSoftwareMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="spsc_ComputerEquipmentAndSoftwareMember" abstract="true" name="ComputerEquipmentAndSoftwareMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="spsc_OfficeEquipmentAndFurnitureMember" abstract="true" name="OfficeEquipmentAndFurnitureMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="spsc_ScheduleOfAccountingPoliciesLineItems" abstract="true" name="ScheduleOfAccountingPoliciesLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="spsc_BusinessDescriptionCommerceIntelligencePeriod" abstract="false" name="BusinessDescriptionCommerceIntelligencePeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="spsc_DeferredCommissionExpectedAmortizationPeriod" abstract="false" name="DeferredCommissionExpectedAmortizationPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="spsc_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfOfferingPeriods" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfOfferingPeriods" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="spsc_ShareBasedCompensationArrangementByShareBasedPaymentAwardStockPlanOfferingPeriod" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardStockPlanOfferingPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="spsc_Carbon6Member" abstract="true" name="Carbon6Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="spsc_SupplyPikeInc.Member" abstract="true" name="SupplyPikeInc.Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="spsc_TraverseSystemsMember" abstract="true" name="TraverseSystemsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="spsc_Vision33SAPBusinessOneSPSIntegrationTechnologyMember" abstract="true" name="Vision33SAPBusinessOneSPSIntegrationTechnologyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="spsc_BusinessCombinationConsiderationTransferredNetOfCashAcquired" abstract="false" name="BusinessCombinationConsiderationTransferredNetOfCashAcquired" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="spsc_BusinessAcquisitionRemainderPayablePaymentTerm" abstract="false" name="BusinessAcquisitionRemainderPayablePaymentTerm" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="spsc_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherAssets" abstract="false" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherAssets" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="spsc_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesOther" abstract="false" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesOther" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="spsc_RevenueRecognitionTable" abstract="true" name="RevenueRecognitionTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="spsc_FulfillmentMember" abstract="true" name="FulfillmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="spsc_AnalyticsMember" abstract="true" name="AnalyticsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="spsc_OtherMember" abstract="true" name="OtherMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="spsc_RecurringRevenuesMember" abstract="true" name="RecurringRevenuesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="spsc_OneTimeRevenuesMember" abstract="true" name="OneTimeRevenuesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="spsc_RevenueRecognitionLineItems" abstract="true" name="RevenueRecognitionLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="spsc_CustomerContractCancellationPeriod" abstract="false" name="CustomerContractCancellationPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="spsc_RecurringRevenuesTimingOfBillingsLatestPeriod" abstract="false" name="RecurringRevenuesTimingOfBillingsLatestPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="spsc_SetUpFeesRecognizedPeriod" abstract="false" name="SetUpFeesRecognizedPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="spsc_MaximumRecognitionPeriodForMiscellaneousOneTimeFee" abstract="false" name="MaximumRecognitionPeriodForMiscellaneousOneTimeFee" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="spsc_SetUpFeesMember" abstract="true" name="SetUpFeesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="spsc_DeferredRevenueArrangementRollForward" abstract="true" name="DeferredRevenueArrangementRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="spsc_DeferredRevenueInvoicedSetUpFees" abstract="false" name="DeferredRevenueInvoicedSetUpFees" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="spsc_DeferredRevenueAmortizedSetUpFees" abstract="false" name="DeferredRevenueAmortizedSetUpFees" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="spsc_DeferredCostsRollForward" abstract="true" name="DeferredCostsRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="spsc_DeferredCostsIncurred" abstract="false" name="DeferredCostsIncurred" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="spsc_DeferredCostsAmortized" abstract="false" name="DeferredCostsAmortized" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="spsc_FiniteLivedIntangibleAssetsAccumulatedForeignCurrencyTranslationGainLoss" abstract="false" name="FiniteLivedIntangibleAssetsAccumulatedForeignCurrencyTranslationGainLoss" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="spsc_LesseeOperatingLeaseLeasedArea" abstract="false" name="LesseeOperatingLeaseLeasedArea" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:areaItemType"/>
  <xs:element id="spsc_LesseeOperatingLeaseLeaseIncentives" abstract="false" name="LesseeOperatingLeaseLeaseIncentives" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="spsc_LesseeOperatingLeaseLeaseIncentivesUtilized" abstract="false" name="LesseeOperatingLeaseLeaseIncentivesUtilized" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="spsc_CashPaidForAmountsIncludedInMeasurementOfLeaseLiabilitiesAbstract" abstract="true" name="CashPaidForAmountsIncludedInMeasurementOfLeaseLiabilitiesAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="spsc_LesseeOperatingLeaseLiabilityToBePaidNetOfLeaseIncentivesYearTwo" abstract="false" name="LesseeOperatingLeaseLiabilityToBePaidNetOfLeaseIncentivesYearTwo" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="spsc_ScheduleOfStockholdersEquityTable" abstract="true" name="ScheduleOfStockholdersEquityTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="spsc_A2022StockRepurchaseProgramMember" abstract="true" name="A2022StockRepurchaseProgramMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="spsc_A2024StockRepurchaseProgramMember" abstract="true" name="A2024StockRepurchaseProgramMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="spsc_A2025StockRepurchaseProgramMember" abstract="true" name="A2025StockRepurchaseProgramMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="spsc_ScheduleOfStockholdersEquityLineItems" abstract="true" name="ScheduleOfStockholdersEquityLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="spsc_TreasuryStockUnusedAndExpiredRepurchaseValue" abstract="false" name="TreasuryStockUnusedAndExpiredRepurchaseValue" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="spsc_StockRepurchaseProgramAdditionalAuthorizedAmount" abstract="false" name="StockRepurchaseProgramAdditionalAuthorizedAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="spsc_RestrictedStockUnitsAndDeferredStockUnitsMember" abstract="true" name="RestrictedStockUnitsAndDeferredStockUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="spsc_EmployeeStockPurchasePlanMember" abstract="true" name="EmployeeStockPurchasePlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="spsc_FourZeroOneKStockMatchMember" abstract="true" name="FourZeroOneKStockMatchMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="spsc_DeferredStockUnitsMember" abstract="true" name="DeferredStockUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="spsc_PerformanceShareUnitsRestrictedStockUnitsRestrictedStockAwardsAndDeferredStockUnitsMember" abstract="true" name="PerformanceShareUnitsRestrictedStockUnitsRestrictedStockAwardsAndDeferredStockUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="spsc_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardReceiptDelay" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardReceiptDelay" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="spsc_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAtPeriodEnd" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAtPeriodEnd" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="spsc_ShareBasedCompensationArrangementByShareBasedPaymentAwardValuePurchasedForAward" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardValuePurchasedForAward" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="spsc_IncomeBeforeIncomeTaxMember" abstract="true" name="IncomeBeforeIncomeTaxMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="spsc_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseCompensationExpenseAmount" abstract="false" name="EffectiveIncomeTaxRateReconciliationNondeductibleExpenseCompensationExpenseAmount" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="spsc_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseCompensationExpensePercent" abstract="false" name="EffectiveIncomeTaxRateReconciliationNondeductibleExpenseCompensationExpensePercent" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="spsc_EffectiveIncomeTaxRateReconciliationTaxBenefitsForExcessTaxDeductionFromStockActivity" abstract="false" name="EffectiveIncomeTaxRateReconciliationTaxBenefitsForExcessTaxDeductionFromStockActivity" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="spsc_DeferredTaxAssetsOperatingLossAndTaxCreditCarryforwards" abstract="false" name="DeferredTaxAssetsOperatingLossAndTaxCreditCarryforwards" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="spsc_DeferredTaxAssetsOperatingLeaseLiabilities" abstract="false" name="DeferredTaxAssetsOperatingLeaseLiabilities" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="spsc_DeferredTaxLiabilitiesDeferredRevenueAndExpense" abstract="false" name="DeferredTaxLiabilitiesDeferredRevenueAndExpense" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="spsc_DeferredTaxLiabilitiesRightOfUseAssets" abstract="false" name="DeferredTaxLiabilitiesRightOfUseAssets" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="spsc_DeferredTaxLiabilitiesPropertyPlantAndEquipmentAndOtherFiniteLivedAssets" abstract="false" name="DeferredTaxLiabilitiesPropertyPlantAndEquipmentAndOtherFiniteLivedAssets" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="spsc_IncomeTaxExpenseBenefitTable" abstract="true" name="IncomeTaxExpenseBenefitTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="spsc_IncomeTaxExpenseBenefitLineItems" abstract="true" name="IncomeTaxExpenseBenefitLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="spsc_OperatingLossCarryforwardAmountExpectedToExpireUnused" abstract="false" name="OperatingLossCarryforwardAmountExpectedToExpireUnused" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="spsc_OperatingLossCarryforwardNetOfAmountExpectedToExpireUnused" abstract="false" name="OperatingLossCarryforwardNetOfAmountExpectedToExpireUnused" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="spsc_EarningsPerShareBasicAndDilutedEPSAbstract" abstract="true" name="EarningsPerShareBasicAndDilutedEPSAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="spsc_DefinedContributionPlanEmployerNotNoteDiscretionaryContributionAmount" abstract="false" name="DefinedContributionPlanEmployerNotNoteDiscretionaryContributionAmount" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="spsc_ContributionsToFoundationMember" abstract="true" name="ContributionsToFoundationMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="spsc_DanJuckniessMember" abstract="true" name="DanJuckniessMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="spsc_JamieThingelstadMember" abstract="true" name="JamieThingelstadMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
</xs:schema>
