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  <xs:element name="ProceedsFromIssuanceOfConvertiblePromissoryNotesAndEmbeddedWarrants" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="prst_ProceedsFromIssuanceOfConvertiblePromissoryNotesAndEmbeddedWarrants"/>
  <xs:element name="ProceedsFromIssuanceOfFinancingObligations" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="prst_ProceedsFromIssuanceOfFinancingObligations"/>
  <xs:element name="ProceedsFromMergerAndPipeFinancingNet" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="prst_ProceedsFromMergerAndPipeFinancingNet"/>
  <xs:element name="PaymentsOfDeferredTransactionCosts" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="prst_PaymentsOfDeferredTransactionCosts"/>
  <xs:element name="IssuanceOfWarrants" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="prst_IssuanceOfWarrants"/>
  <xs:element name="CapitalContributionFromShareholderInConjunctionWithCreditAgreement" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="prst_CapitalContributionFromShareholderInConjunctionWithCreditAgreement"/>
  <xs:element name="IssuanceOfWarrantsInConjunctionWithCreditAgreement" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="prst_IssuanceOfWarrantsInConjunctionWithCreditAgreement"/>
  <xs:element name="IssuanceOfWarrantsInConjunctionWithLagoTermLoan" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="prst_IssuanceOfWarrantsInConjunctionWithLagoTermLoan"/>
  <xs:element name="ReclassificationOfWarrantsFromLiabilitiesToEquity" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="prst_ReclassificationOfWarrantsFromLiabilitiesToEquity"/>
  <xs:element name="RecognitionOfLiabilityClassifiedWarrantsUponMerger" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="prst_RecognitionOfLiabilityClassifiedWarrantsUponMerger"/>
  <xs:element name="RecognitionOfUnvestedFounderSharesLiability" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="prst_RecognitionOfUnvestedFounderSharesLiability"/>
  <xs:element name="ForgivenessOfPppLoan" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="prst_ForgivenessOfPppLoan"/>
  <xs:element name="TransactionCostsRecordedInAccountsPayableAndAccruedLiabilities" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="prst_TransactionCostsRecordedInAccountsPayableAndAccruedLiabilities"/>
  <xs:element name="RightOfUseAssetInExchangeForOperatingLeaseLiability" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="prst_RightOfUseAssetInExchangeForOperatingLeaseLiability"/>
  <xs:element name="SummaryofBusinessandSignificantAccountingPoliciesTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="prst_SummaryofBusinessandSignificantAccountingPoliciesTable"/>
  <xs:element name="SummaryofBusinessandSignificantAccountingPoliciesLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_SummaryofBusinessandSignificantAccountingPoliciesLineItems"/>
  <xs:element name="FinancingObligationsDisclosureTextBlock" type="dtr:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_FinancingObligationsDisclosureTextBlock"/>
  <xs:element name="DisclosureOfWarrantsTextBlock" type="dtr:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_DisclosureOfWarrantsTextBlock"/>
  <xs:element name="DescriptionOfBusinessPolicyPolicyTextBlock" type="dtr:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_DescriptionOfBusinessPolicyPolicyTextBlock"/>
  <xs:element name="EmergingGrowthCompanyStatusPolicyPolicyTextBlock" type="dtr:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_EmergingGrowthCompanyStatusPolicyPolicyTextBlock"/>
  <xs:element name="RiskAndUncertaintiesPolicyPolicyTextBlock" type="dtr:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_RiskAndUncertaintiesPolicyPolicyTextBlock"/>
  <xs:element name="ImpactOfCovid19PolicyPolicyTextBlock" type="dtr:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_ImpactOfCovid19PolicyPolicyTextBlock"/>
  <xs:element name="ScheduleOfNetProceedsFromTrustAndPipePrivatePlacementTableTextBlock" type="dtr:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_ScheduleOfNetProceedsFromTrustAndPipePrivatePlacementTableTextBlock"/>
  <xs:element name="ScheduleOfDifferenceBetweenCarryingAmountAndFairValueTableTextBlock" type="dtr:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_ScheduleOfDifferenceBetweenCarryingAmountAndFairValueTableTextBlock"/>
  <xs:element name="FairValueMeasurementsTablesTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="prst_FairValueMeasurementsTablesTable"/>
  <xs:element name="FairValueMeasurementsTablesLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_FairValueMeasurementsTablesLineItems"/>
  <xs:element name="LeaseOperatingLeaseSupplementalInformationDisclosureTableTextBlock" type="dtr:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_LeaseOperatingLeaseSupplementalInformationDisclosureTableTextBlock"/>
  <xs:element name="ScheduleOfFinancingObligationNetOfDiscountsTableTextBlock" type="dtr:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_ScheduleOfFinancingObligationNetOfDiscountsTableTextBlock"/>
  <xs:element name="ScheduleOfCommonStockReservedForFutureIssuanceTableTextBlock" type="dtr:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_ScheduleOfCommonStockReservedForFutureIssuanceTableTextBlock"/>
  <xs:element name="ScheduleOfWarrantsOnCommonStockOutstandingTableTextBlock" type="dtr:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_ScheduleOfWarrantsOnCommonStockOutstandingTableTextBlock"/>
  <xs:element name="ScheduleOfStockbasedCompensationExpenseExcludingStockbasedCompensationInCapitalizedSoftwareTableTextBlock" type="dtr:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_ScheduleOfStockbasedCompensationExpenseExcludingStockbasedCompensationInCapitalizedSoftwareTableTextBlock"/>
  <xs:element name="NetIncomeLossPerShareTablesTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="prst_NetIncomeLossPerShareTablesTable"/>
  <xs:element name="NetIncomeLossPerShareTablesLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_NetIncomeLossPerShareTablesLineItems"/>
  <xs:element name="SummaryofBusinessandSignificantAccountingPoliciesDetailsScheduleofTrustProceedsandPIPEnetoftransactioncostsandotherpaymentsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="prst_SummaryofBusinessandSignificantAccountingPoliciesDetailsScheduleofTrustProceedsandPIPEnetoftransactioncostsandotherpaymentsTable"/>
  <xs:element name="SummaryofBusinessandSignificantAccountingPoliciesDetailsScheduleofTrustProceedsandPIPEnetoftransactioncostsandotherpaymentsLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_SummaryofBusinessandSignificantAccountingPoliciesDetailsScheduleofTrustProceedsandPIPEnetoftransactioncostsandotherpaymentsLineItems"/>
  <xs:element name="ProceedsFromTrustAndWorkingCapitalCash" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="prst_ProceedsFromTrustAndWorkingCapitalCash"/>
  <xs:element name="TransactionCostsAndOtherPayments" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="prst_TransactionCostsAndOtherPayments"/>
  <xs:element name="TotalofNetFees" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="prst_TotalofNetFees"/>
  <xs:element name="ContractWithCustomerLiabilityAdditions" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="prst_ContractWithCustomerLiabilityAdditions"/>
  <xs:element name="ContractWithCustomersLiabilityRevenueRecognized" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="prst_ContractWithCustomersLiabilityRevenueRecognized"/>
  <xs:element name="FairValueMeasurementsDetailsScheduleoffairvalueoffinancialinstrumentsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="prst_FairValueMeasurementsDetailsScheduleoffairvalueoffinancialinstrumentsTable"/>
  <xs:element name="FairValueMeasurementsDetailsScheduleoffairvalueoffinancialinstrumentsLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_FairValueMeasurementsDetailsScheduleoffairvalueoffinancialinstrumentsLineItems"/>
  <xs:element name="UnvestedFounderShareLiabilityMeasurementInput" type="xbrli:decimalItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="prst_UnvestedFounderShareLiabilityMeasurementInput"/>
  <xs:element name="FairValueMeasurementsDetailsScheduleofdifferencebetweencarryingamountandthefairvalueTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="prst_FairValueMeasurementsDetailsScheduleofdifferencebetweencarryingamountandthefairvalueTable"/>
  <xs:element name="FairValueMeasurementsDetailsScheduleofdifferencebetweencarryingamountandthefairvalueLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_FairValueMeasurementsDetailsScheduleofdifferencebetweencarryingamountandthefairvalueLineItems"/>
  <xs:element name="ReclassificationOfLiabilityClassifiedWarrantsToEquity" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="prst_ReclassificationOfLiabilityClassifiedWarrantsToEquity"/>
  <xs:element name="RecognitionOfWarrantsAndUnvestedFounderSharesLiabilities" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="prst_RecognitionOfWarrantsAndUnvestedFounderSharesLiabilities"/>
  <xs:element name="ConversionOfWarrantLiabilityAndConvertiblePromissoryNotes" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="prst_ConversionOfWarrantLiabilityAndConvertiblePromissoryNotes"/>
  <xs:element name="FiniteLivedIntangibleAssetExpectedAmortizationAfterYearFour" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="prst_FiniteLivedIntangibleAssetExpectedAmortizationAfterYearFour"/>
  <xs:element name="FiniteLivedIntangibleAssetsLessCapitalizedIntangibleAssetsNet" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="prst_FiniteLivedIntangibleAssetsLessCapitalizedIntangibleAssetsNet"/>
  <xs:element name="AccruedExpensesCurrent" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="prst_AccruedExpensesCurrent"/>
  <xs:element name="AccruedPayrollCurrent" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="prst_AccruedPayrollCurrent"/>
  <xs:element name="AccruedRepairCost" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="prst_AccruedRepairCost"/>
  <xs:element name="UnvestedFounderSharesLiabilityNoncurrent" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="prst_UnvestedFounderSharesLiabilityNoncurrent"/>
  <xs:element name="OperatingLeasesLiability" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="prst_OperatingLeasesLiability"/>
  <xs:element name="FinancingObligationsDetailsScheduleoffinancingobligationsnetofdiscountsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="prst_FinancingObligationsDetailsScheduleoffinancingobligationsnetofdiscountsTable"/>
  <xs:element name="FinancingObligationsDetailsScheduleoffinancingobligationsnetofdiscountsLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_FinancingObligationsDetailsScheduleoffinancingobligationsnetofdiscountsLineItems"/>
  <xs:element name="DebtArrangementsDetailsScheduleofdebtTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="prst_DebtArrangementsDetailsScheduleofdebtTable"/>
  <xs:element name="DebtArrangementsDetailsScheduleofdebtLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_DebtArrangementsDetailsScheduleofdebtLineItems"/>
  <xs:element name="DebtArrangementsDetailsScheduleofmaturitiesofdebtTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="prst_DebtArrangementsDetailsScheduleofmaturitiesofdebtTable"/>
  <xs:element name="DebtArrangementsDetailsScheduleofmaturitiesofdebtLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_DebtArrangementsDetailsScheduleofmaturitiesofdebtLineItems"/>
  <xs:element name="StockholdersDeficitDetailsScheduleofcommonstockreservedforfutureissuanceTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="prst_StockholdersDeficitDetailsScheduleofcommonstockreservedforfutureissuanceTable"/>
  <xs:element name="StockholdersDeficitDetailsScheduleofcommonstockreservedforfutureissuanceLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_StockholdersDeficitDetailsScheduleofcommonstockreservedforfutureissuanceLineItems"/>
  <xs:element name="WarrantsDetailsScheduleofwarrantsoncommonstockoutstandingTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="prst_WarrantsDetailsScheduleofwarrantsoncommonstockoutstandingTable"/>
  <xs:element name="WarrantsDetailsScheduleofwarrantsoncommonstockoutstandingLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_WarrantsDetailsScheduleofwarrantsoncommonstockoutstandingLineItems"/>
  <xs:element name="ExpirationofDate" type="xbrli:stringItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="prst_ExpirationofDate"/>
  <xs:element name="NumberOfShares" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_NumberOfShares"/>
  <xs:element name="ClassificationOfInstitutionCreditUnion" type="xbrli:stringItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="prst_ClassificationOfInstitutionCreditUnion"/>
  <xs:element name="StockBasedCompensationDetailsScheduleoftheequityincentiveplanactivityTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="prst_StockBasedCompensationDetailsScheduleoftheequityincentiveplanactivityTable"/>
  <xs:element name="StockBasedCompensationDetailsScheduleoftheequityincentiveplanactivityLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_StockBasedCompensationDetailsScheduleoftheequityincentiveplanactivityLineItems"/>
  <xs:element name="NumberOfOptionsOutstandingRetrospectiveApplicationOfRecapitalization" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_NumberOfOptionsOutstandingRetrospectiveApplicationOfRecapitalization"/>
  <xs:element name="WeightedAverageExercisePriceRetrospectiveApplicationOfRecapitalizationinDollars" type="dtr:perShareItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_WeightedAverageExercisePriceRetrospectiveApplicationOfRecapitalizationinDollars"/>
  <xs:element name="StockIssuedDuringPeriodSharesStockOptionExercised" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_StockIssuedDuringPeriodSharesStockOptionExercised"/>
  <xs:element name="WeightedAverageExercisePriceForfeitedAndExpired" type="dtr:perShareItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_WeightedAverageExercisePriceForfeitedAndExpired"/>
  <xs:element name="SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTerm" type="xbrli:durationItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTerm"/>
  <xs:element name="NumberOfAwardsOutstandingRetrospectiveApplicationOfRecapitalizationinDollars" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_NumberOfAwardsOutstandingRetrospectiveApplicationOfRecapitalizationinDollars"/>
  <xs:element name="WeighteAverageGrantDateFairValueRetrospectiveapplicationofrecapitalization" type="dtr:perShareItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_WeighteAverageGrantDateFairValueRetrospectiveapplicationofrecapitalization"/>
  <xs:element name="WeightedAverageGrantDateFairValueAdjustedUnvestedBalance" type="dtr:perShareItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_WeightedAverageGrantDateFairValueAdjustedUnvestedBalance"/>
  <xs:element name="WeightedAverageGrantDateFairValueGranted" type="dtr:perShareItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_WeightedAverageGrantDateFairValueGranted"/>
  <xs:element name="StockBasedCompensationDetailsScheduleofstockbasedcompensationexpenseexcludingstockbasedcompensationincapitalizedsoftwareTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="prst_StockBasedCompensationDetailsScheduleofstockbasedcompensationexpenseexcludingstockbasedcompensationincapitalizedsoftwareTable"/>
  <xs:element name="StockBasedCompensationDetailsScheduleofstockbasedcompensationexpenseexcludingstockbasedcompensationincapitalizedsoftwareLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_StockBasedCompensationDetailsScheduleofstockbasedcompensationexpenseexcludingstockbasedcompensationincapitalizedsoftwareLineItems"/>
  <xs:element name="EffectOnBasicEarningsPerShareChangeInFairValueConvertibleNotes" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="prst_EffectOnBasicEarningsPerShareChangeInFairValueConvertibleNotes"/>
  <xs:element name="SummaryofBusinessandSignificantAccountingPoliciesDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="prst_SummaryofBusinessandSignificantAccountingPoliciesDetailsTable"/>
  <xs:element name="SummaryofBusinessandSignificantAccountingPoliciesDetailsLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_SummaryofBusinessandSignificantAccountingPoliciesDetailsLineItems"/>
  <xs:element name="AmountPlacedInTrustAccount" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="prst_AmountPlacedInTrustAccount"/>
  <xs:element name="UnredeemedFunds" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="prst_UnredeemedFunds"/>
  <xs:element name="PaymentOfTransactionCost" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="prst_PaymentOfTransactionCost"/>
  <xs:element name="OtherCostsNotRelatedToMerger" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="prst_OtherCostsNotRelatedToMerger"/>
  <xs:element name="MergerRelatedTransactionCostPayable" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="prst_MergerRelatedTransactionCostPayable"/>
  <xs:element name="UnpaidTransactionCostsRelatedToMerger" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="prst_UnpaidTransactionCostsRelatedToMerger"/>
  <xs:element name="ConvertedPerShare" type="dtr:perShareItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="prst_ConvertedPerShare"/>
  <xs:element name="EarnoutArrangementThresholdTradingDays" type="xbrli:integerItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_EarnoutArrangementThresholdTradingDays"/>
  <xs:element name="EarnoutArrangementThresholdConsecutiveTradingDays" type="xbrli:integerItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_EarnoutArrangementThresholdConsecutiveTradingDays"/>
  <xs:element name="EarnOutShares" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_EarnOutShares"/>
  <xs:element name="UnvestedFoundersShares" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="prst_UnvestedFoundersShares"/>
  <xs:element name="NumberOfConsecutiveTradingDays" type="xbrli:integerItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_NumberOfConsecutiveTradingDays"/>
  <xs:element name="NumberOfTradingDays" type="xbrli:integerItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_NumberOfTradingDays"/>
  <xs:element name="LiabilityForUnvestedFounderShares" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="prst_LiabilityForUnvestedFounderShares"/>
  <xs:element name="GainOnRemeasurementOfUnvestedFounderShares" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="prst_GainOnRemeasurementOfUnvestedFounderShares"/>
  <xs:element name="LossOnRemeasurementOfUnvestedFounderShares" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="prst_LossOnRemeasurementOfUnvestedFounderShares"/>
  <xs:element name="SharesAuthorized" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="prst_SharesAuthorized"/>
  <xs:element name="BusinessCombinationExchangeRatios" type="dtr:perShareItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_BusinessCombinationExchangeRatios"/>
  <xs:element name="BonusAndDeferredConsiderationExpense" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="prst_BonusAndDeferredConsiderationExpense"/>
  <xs:element name="ConcentrationRiskPercentage" type="dtr:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_ConcentrationRiskPercentage"/>
  <xs:element name="AccountsReceivablePercentage" type="dtr:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_AccountsReceivablePercentage"/>
  <xs:element name="NumberOfRevenueStreams" type="xbrli:integerItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_NumberOfRevenueStreams"/>
  <xs:element name="TermOfContract" type="xbrli:durationItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_TermOfContract"/>
  <xs:element name="RevenueDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="prst_RevenueDetailsTable"/>
  <xs:element name="RevenueDetailsLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_RevenueDetailsLineItems"/>
  <xs:element name="MarketingDevelopmentExpensePayable" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="prst_MarketingDevelopmentExpensePayable"/>
  <xs:element name="RevenueRemainingsPerformanceObligation" type="xbrli:durationItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_RevenueRemainingsPerformanceObligation"/>
  <xs:element name="PercentageOfInterestAccruedOnUnpaidBalance" type="dtr:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_PercentageOfInterestAccruedOnUnpaidBalance"/>
  <xs:element name="HandheldServicesPayable" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="prst_HandheldServicesPayable"/>
  <xs:element name="AlternativeInstallationAndReplacementServices" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="prst_AlternativeInstallationAndReplacementServices"/>
  <xs:element name="CoverExpensesRelatingToLiquidIngressIssue" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="prst_CoverExpensesRelatingToLiquidIngressIssue"/>
  <xs:element name="AccruedInterestWaived" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="prst_AccruedInterestWaived"/>
  <xs:element name="CancellationOfRefundRequested" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="prst_CancellationOfRefundRequested"/>
  <xs:element name="PercentOfRevenuePaidToVendor" type="dtr:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_PercentOfRevenuePaidToVendor"/>
  <xs:element name="PercentageOfCommissionPaidToRestaurants" type="dtr:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_PercentageOfCommissionPaidToRestaurants"/>
  <xs:element name="PercentageOfPremiumContentRevenue" type="dtr:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_PercentageOfPremiumContentRevenue"/>
  <xs:element name="RevenueFromLeaseArrangements" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="prst_RevenueFromLeaseArrangements"/>
  <xs:element name="ConsolidatedBalanceSheetComponentsDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="prst_ConsolidatedBalanceSheetComponentsDetailsTable"/>
  <xs:element name="ConsolidatedBalanceSheetComponentsDetailsLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_ConsolidatedBalanceSheetComponentsDetailsLineItems"/>
  <xs:element name="OperatingLeasesLiabilityCurrent" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="prst_OperatingLeasesLiabilityCurrent"/>
  <xs:element name="VariableOperatingLeaseCost" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="prst_VariableOperatingLeaseCost"/>
  <xs:element name="NonCanCelableOperatingLease" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="prst_NonCanCelableOperatingLease"/>
  <xs:element name="FinancingObligationsDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="prst_FinancingObligationsDetailsTable"/>
  <xs:element name="FinancingObligationsDetailsLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_FinancingObligationsDetailsLineItems"/>
  <xs:element name="DebtArrangementsDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="prst_DebtArrangementsDetailsTable"/>
  <xs:element name="DebtArrangementsDetailsLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_DebtArrangementsDetailsLineItems"/>
  <xs:element name="DebtInstrumentPercentageOfCapitalizedInterestPaymentAsPikInterest" type="dtr:percentItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="prst_DebtInstrumentPercentageOfCapitalizedInterestPaymentAsPikInterest"/>
  <xs:element name="DebtInstrumentCovenantConsolidatedLeverageRatio" type="xbrli:pureItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="prst_DebtInstrumentCovenantConsolidatedLeverageRatio"/>
  <xs:element name="CashCovenantRequirementAmount" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="prst_CashCovenantRequirementAmount"/>
  <xs:element name="IncreaseInInterestRate" type="dtr:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_IncreaseInInterestRate"/>
  <xs:element name="ClassOfWarrantOrRightOutstanding1" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="prst_ClassOfWarrantOrRightOutstanding1"/>
  <xs:element name="PaymentInKindInterestExpense" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="prst_PaymentInKindInterestExpense"/>
  <xs:element name="PrincipalAmountOfTermLoanOutstanding" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="prst_PrincipalAmountOfTermLoanOutstanding"/>
  <xs:element name="PaymentInKindInterestAccruedNet" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="prst_PaymentInKindInterestAccruedNet"/>
  <xs:element name="GainLossOnFairValueRemeasurementOfConvertiblePromissoryNotes" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="prst_GainLossOnFairValueRemeasurementOfConvertiblePromissoryNotes"/>
  <xs:element name="AdjustmentToAdditionalPaidInCapitalReclassificationOnConversionOfConvertibleDebt" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="prst_AdjustmentToAdditionalPaidInCapitalReclassificationOnConversionOfConvertibleDebt"/>
  <xs:element name="NumberOfPaymentOfDebtAccruedInterest" type="xbrli:integerItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_NumberOfPaymentOfDebtAccruedInterest"/>
  <xs:element name="NumberOfPaymentOfDebtPrincipalAndAccruedInterest" type="xbrli:integerItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_NumberOfPaymentOfDebtPrincipalAndAccruedInterest"/>
  <xs:element name="ExtinguishmentOfDebtPrincipalAmount" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="prst_ExtinguishmentOfDebtPrincipalAmount"/>
  <xs:element name="ExtinguishmentOfDebtInterestAmount" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="prst_ExtinguishmentOfDebtInterestAmount"/>
  <xs:element name="DebtInstrumentInterestRatePaidInKindPercentage" type="dtr:percentItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="prst_DebtInstrumentInterestRatePaidInKindPercentage"/>
  <xs:element name="NumberOfInterestOnlyPaymentDates" type="xbrli:integerItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="prst_NumberOfInterestOnlyPaymentDates"/>
  <xs:element name="PercentageOfLoanToBeForgivenBeingUsedForPayroll" type="dtr:percentItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="prst_PercentageOfLoanToBeForgivenBeingUsedForPayroll"/>
  <xs:element name="CommitmentsandContingenciesDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="prst_CommitmentsandContingenciesDetailsTable"/>
  <xs:element name="CommitmentsandContingenciesDetailsLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_CommitmentsandContingenciesDetailsLineItems"/>
  <xs:element name="StockholdersDeficitDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="prst_StockholdersDeficitDetailsTable"/>
  <xs:element name="StockholdersDeficitDetailsLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_StockholdersDeficitDetailsLineItems"/>
  <xs:element name="NumberOfVotesForEachSharesHeld" type="xbrli:integerItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="prst_NumberOfVotesForEachSharesHeld"/>
  <xs:element name="NumberOfSharesHeldByInvestorPreMerger" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="prst_NumberOfSharesHeldByInvestorPreMerger"/>
  <xs:element name="TerminationFee" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="prst_TerminationFee"/>
  <xs:element name="ExpensesAgreedToPay" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="prst_ExpensesAgreedToPay"/>
  <xs:element name="WarrantsDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="prst_WarrantsDetailsTable"/>
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  <xs:element name="CreditAgreementShares" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_CreditAgreementShares"/>
  <xs:element name="NumberOfContingentWarrantsOutstanding" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="prst_NumberOfContingentWarrantsOutstanding"/>
  <xs:element name="StockBasedCompensationDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="prst_StockBasedCompensationDetailsTable"/>
  <xs:element name="StockBasedCompensationDetailsLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_StockBasedCompensationDetailsLineItems"/>
  <xs:element name="CommonStockReservedForFutureIssuance" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="prst_CommonStockReservedForFutureIssuance"/>
  <xs:element name="GrantDateFairValue" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_GrantDateFairValue"/>
  <xs:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEmployeeStockOfferingPeriod" type="xbrli:durationItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_ShareBasedCompensationArrangementByShareBasedPaymentAwardEmployeeStockOfferingPeriod"/>
  <xs:element name="NetIncomeLossPerShareDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="prst_NetIncomeLossPerShareDetailsTable"/>
  <xs:element name="NetIncomeLossPerShareDetailsLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_NetIncomeLossPerShareDetailsLineItems"/>
  <xs:element name="RelatedPartyTransactionsDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="prst_RelatedPartyTransactionsDetailsTable"/>
  <xs:element name="RelatedPartyTransactionsDetailsLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_RelatedPartyTransactionsDetailsLineItems"/>
  <xs:element name="DueToRelatedPartieCurrent" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="prst_DueToRelatedPartieCurrent"/>
  <xs:element name="SubsequentEventsDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="prst_SubsequentEventsDetailsTable"/>
  <xs:element name="SubsequentEventsDetailsLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_SubsequentEventsDetailsLineItems"/>
  <xs:element name="MonthlyPaymentProfessionalFees" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="prst_MonthlyPaymentProfessionalFees"/>
  <xs:element name="AccruedLiabilitiesCurrentMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_AccruedLiabilitiesCurrentMember"/>
  <xs:element name="AiPlatformMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_AiPlatformMember"/>
  <xs:element name="ChangeInControlMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_ChangeInControlMember"/>
  <xs:element name="Common10Member" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_Common10Member"/>
  <xs:element name="Common11Member" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_Common11Member"/>
  <xs:element name="Common12Member" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_Common12Member"/>
  <xs:element name="Common13Member" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_Common13Member"/>
  <xs:element name="Common14Member" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_Common14Member"/>
  <xs:element name="Common15Member" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_Common15Member"/>
  <xs:element name="Common16Member" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_Common16Member"/>
  <xs:element name="Common1Member" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_Common1Member"/>
  <xs:element name="Common2Member" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_Common2Member"/>
  <xs:element name="Common3Member" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_Common3Member"/>
  <xs:element name="Common4Member" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_Common4Member"/>
  <xs:element name="Common5Member" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_Common5Member"/>
  <xs:element name="Common6Member" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_Common6Member"/>
  <xs:element name="Common7Member" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_Common7Member"/>
  <xs:element name="Common8Member" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_Common8Member"/>
  <xs:element name="Common9Member" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_Common9Member"/>
  <xs:element name="CommonMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_CommonMember"/>
  <xs:element name="CommonWarrantsSevenMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_CommonWarrantsSevenMember"/>
  <xs:element name="ConvertiblePromissoryNotesAndEmbeddedWarrantsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_ConvertiblePromissoryNotesAndEmbeddedWarrantsMember"/>
  <xs:element name="CreditAgreementMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_CreditAgreementMember"/>
  <xs:element name="CustomerBMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_CustomerBMember"/>
  <xs:element name="CustomerCMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_CustomerCMember"/>
  <xs:element name="CustomerDMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_CustomerDMember"/>
  <xs:element name="CustomerMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_CustomerMember"/>
  <xs:element name="CyborgOpsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_CyborgOpsMember"/>
  <xs:element name="DebtInterestPeriodOfTimeOneMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_DebtInterestPeriodOfTimeOneMember"/>
  <xs:element name="DebtInterestPeriodOfTimeTwoMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_DebtInterestPeriodOfTimeTwoMember"/>
  <xs:element name="DepreciationAndImpairmentMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_DepreciationAndImpairmentMember"/>
  <xs:element name="DirectorAndCeoMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_DirectorAndCeoMember"/>
  <xs:element name="EarliestPeriodSpecifiedUnderArrangementMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_EarliestPeriodSpecifiedUnderArrangementMember"/>
  <xs:element name="EarnoutSharesMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_EarnoutSharesMember"/>
  <xs:element name="EmployeeStockPurchasePlanMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_EmployeeStockPurchasePlanMember"/>
  <xs:element name="EmployeesAndConsultantsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_EmployeesAndConsultantsMember"/>
  <xs:element name="EmployeesConsultantsAndDirectorsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_EmployeesConsultantsAndDirectorsMember"/>
  <xs:element name="EquipmentFinancingFacilityMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_EquipmentFinancingFacilityMember"/>
  <xs:element name="EquityAwardsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_EquityAwardsMember"/>
  <xs:element name="February2022NotesMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_February2022NotesMember"/>
  <xs:element name="FifthAnniversaryMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_FifthAnniversaryMember"/>
  <xs:element name="GamingMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_GamingMember"/>
  <xs:element name="HorizonLoansMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_HorizonLoansMember"/>
  <xs:element name="HorizonTermLoanMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_HorizonTermLoanMember"/>
  <xs:element name="July2021NotesMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_July2021NotesMember"/>
  <xs:element name="LagoTermLoansMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_LagoTermLoansMember"/>
  <xs:element name="LegacyPrestoLlcMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_LegacyPrestoLlcMember"/>
  <xs:element name="LiquidityAndCapitalResourcesMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_LiquidityAndCapitalResourcesMember"/>
  <xs:element name="MajorCustomersMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_MajorCustomersMember"/>
  <xs:element name="MatterRelatedToThirdPartySubcontractorMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_MatterRelatedToThirdPartySubcontractorMember"/>
  <xs:element name="MaturityDateMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_MaturityDateMember"/>
  <xs:element name="MeasurementInputProbabilityOfConversionMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_MeasurementInputProbabilityOfConversionMember"/>
  <xs:element name="NonvotingCommonStockWarrantsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_NonvotingCommonStockWarrantsMember"/>
  <xs:element name="OptionsAndRestrictedStockUnitsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_OptionsAndRestrictedStockUnitsMember"/>
  <xs:element name="OtherStockbasedCompensationMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_OtherStockbasedCompensationMember"/>
  <xs:element name="PaycheckProtectionProgramMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_PaycheckProtectionProgramMember"/>
  <xs:element name="PlatformMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_PlatformMember"/>
  <xs:element name="PrivateFinancingMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_PrivateFinancingMember"/>
  <xs:element name="PublicFinancingMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_PublicFinancingMember"/>
  <xs:element name="PublicWarrantsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_PublicWarrantsMember"/>
  <xs:element name="ReceivableFinancingFacilityMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_ReceivableFinancingFacilityMember"/>
  <xs:element name="SecondPeriodSpecifiedUnderArrangementMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_SecondPeriodSpecifiedUnderArrangementMember"/>
  <xs:element name="ServiceBasedVestingAwardMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_ServiceBasedVestingAwardMember"/>
  <xs:element name="ShareBasedPaymentArrangementTrancheFourMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_ShareBasedPaymentArrangementTrancheFourMember"/>
  <xs:element name="SilverRockMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_SilverRockMember"/>
  <xs:element name="StockOptionsAndRestrictedStockUnitsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_StockOptionsAndRestrictedStockUnitsMember"/>
  <xs:element name="TabletMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_TabletMember"/>
  <xs:element name="TermLoansMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_TermLoansMember"/>
  <xs:element name="ThirdAnniversaryMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_ThirdAnniversaryMember"/>
  <xs:element name="ThirdPeriodSpecifiedUnderArrangementMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_ThirdPeriodSpecifiedUnderArrangementMember"/>
  <xs:element name="TransactionMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_TransactionMember"/>
  <xs:element name="UnvestedFounderSharesLiabilityMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_UnvestedFounderSharesLiabilityMember"/>
  <xs:element name="DocumentAndEntityInformationAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="prst_DocumentAndEntityInformationAbstract"/>
</xs:schema>
