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  <xsd:element name="BusinessAcquisitionProceedsFromIssuanceOfCommonUnitsAndSeniorNotesUsedToPreFundAcquisition" id="paa_BusinessAcquisitionProceedsFromIssuanceOfCommonUnitsAndSeniorNotesUsedToPreFundAcquisition" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="BusinessAcquisitionPurchasePriceAdjustmentAmountReceived" id="paa_BusinessAcquisitionPurchasePriceAdjustmentAmountReceived" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedBaseGas" id="paa_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedBaseGas" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element name="BusinessAcquisitionPurchasePriceAllocationContractIncludedInAmortizableIntangibleAssets" id="paa_BusinessAcquisitionPurchasePriceAllocationContractIncludedInAmortizableIntangibleAssets" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedEnvironmentalLiability" id="paa_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedEnvironmentalLiability" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element name="BusinessAcquisitionPurchasePriceAllocationImputedInterest" id="paa_BusinessAcquisitionPurchasePriceAllocationImputedInterest" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLinefill" id="paa_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLinefill" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLongTermInventory" id="paa_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLongTermInventory" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherWorkingCapitalIncludingCashAcquired" id="paa_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherWorkingCapitalIncludingCashAcquired" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherWorkingCapitalNetOfCashAcquired" id="paa_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherWorkingCapitalNetOfCashAcquired" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element name="BusinessAcquisitionPurchasePriceAllocationTaxAbatementIncludedInAmortizableIntangibleAssets" id="paa_BusinessAcquisitionPurchasePriceAllocationTaxAbatementIncludedInAmortizableIntangibleAssets" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedWorkingCapital" id="paa_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedWorkingCapital" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element name="BusinessAcquisitionPurchasePriceEscrowed" id="paa_BusinessAcquisitionPurchasePriceEscrowed" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element name="BusinessAcquisitionPurchasePriceEscrowedPercentage" id="paa_BusinessAcquisitionPurchasePriceEscrowedPercentage" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="ShortButanePositionContractsRelatedToSubsequentSaleOfProductMember" id="paa_ShortButanePositionContractsRelatedToSubsequentSaleOfProductMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ButtePipelineCompanyMember" id="paa_ButtePipelineCompanyMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="CanadianSeniorUnsecuredRevolvingCreditFacilityMember" id="paa_CanadianSeniorUnsecuredRevolvingCreditFacilityMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="CapitalExpenditure" id="paa_CapitalExpenditure" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="CashFlowHedgeGainLossToBeReclassifiedInYearTwoAndThree" id="paa_CashFlowHedgeGainLossToBeReclassifiedInYearTwoAndThree" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="CashFlowHedgeGainLossToBeReclassifiedRemainingPortion" id="paa_CashFlowHedgeGainLossToBeReclassifiedRemainingPortion" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="CashPaidRelatedToPurchasesOfLinefillAndBaseGas" id="paa_CashPaidRelatedToPurchasesOfLinefillAndBaseGas" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="CashReceivedRelatedToSalesOfLinefillAndBaseGas" id="paa_CashReceivedRelatedToSalesOfLinefillAndBaseGas" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="ChangeInAccountingEstimateOfDepreciableLivesEstimatedDepreciationExpenseReduction" id="paa_ChangeInAccountingEstimateOfDepreciableLivesEstimatedDepreciationExpenseReduction" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="ChangeInAccountingEstimateOfDepreciableLivesIncrementalDepreciationExpenseReduction" id="paa_ChangeInAccountingEstimateOfDepreciableLivesIncrementalDepreciationExpenseReduction" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="AAPManagementUnitActivityRollForward" id="paa_AAPManagementUnitActivityRollForward" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="CommissionPaidToSalesAgent" id="paa_CommissionPaidToSalesAgent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="ConocoPhillipsCompanyMember" id="paa_ConocoPhillipsCompanyMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="CostsReimbursedToGeneralPartner" id="paa_CostsReimbursedToGeneralPartner" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="CreditExtensionPeriod" id="paa_CreditExtensionPeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="CrudeOilBasisDifferentialHedgesMember" id="paa_CrudeOilBasisDifferentialHedgesMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="AverageCrudeOilBasisLLSAndWTISwapsDifferentialHedgesMember" id="paa_AverageCrudeOilBasisLLSAndWTISwapsDifferentialHedgesMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="PipelineLossAllowanceCrudeOilLongCallOptionMember" id="paa_PipelineLossAllowanceCrudeOilLongCallOptionMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="CrudeOilFuturesAndSwapsLongPutOptionMember" id="paa_CrudeOilFuturesAndSwapsLongPutOptionMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="PipelineLossAllowanceCrudeOilContractNetShortPositionMember" id="paa_PipelineLossAllowanceCrudeOilContractNetShortPositionMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="PipelineLossAllowanceCrudeOilContractNetLongPositionMember" id="paa_PipelineLossAllowanceCrudeOilContractNetLongPositionMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="DebtInstrumentCoverageRatioDebtToEBITDAAcquisitionPeriodMaximum" id="paa_DebtInstrumentCoverageRatioDebtToEBITDAAcquisitionPeriodMaximum" type="xbrli:decimalItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="DebtInstrumentCoverageRatioDebtToEBITDAMaximum" id="paa_DebtInstrumentCoverageRatioDebtToEBITDAMaximum" type="xbrli:decimalItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="DebtInstrumentCoverageRatioEBITDAToInterestMinimum" id="paa_DebtInstrumentCoverageRatioEBITDAToInterestMinimum" type="xbrli:pureItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="DistributionEquivalentRightPayments" id="paa_DistributionEquivalentRightPayments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="DistributionEquivalentRightsCashPayments" id="paa_DistributionEquivalentRightsCashPayments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="DistributionMadeToMemberOrLimitedPartnerPerUnitOverMinimumDistributionLevel" id="paa_DistributionMadeToMemberOrLimitedPartnerPerUnitOverMinimumDistributionLevel" type="num:perShareItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="DistributionThresholdForParticipationInDistributions" id="paa_DistributionThresholdForParticipationInDistributions" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="DocumentEntityInformationAbstract" id="paa_DocumentEntityInformationAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="EmissionReductionCreditsMember" id="paa_EmissionReductionCreditsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="EmployeesAndDirectorsLongTermIncentivePlanMember" id="paa_EmployeesAndDirectorsLongTermIncentivePlanMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="EnvironmentalRemediationCashExpendituresPeriodInYears" id="paa_EnvironmentalRemediationCashExpendituresPeriodInYears" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="NumberOfEnforcementActionsFiled" id="paa_NumberOfEnforcementActionsFiled" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="EnvironmentalRemediationCostsBusinessSellerShare" id="paa_EnvironmentalRemediationCostsBusinessSellerShare" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="EquityBasedCompensationFairValueFutureAmortizationAbstract" id="paa_EquityBasedCompensationFairValueFutureAmortizationAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="EquityBasedCompensationFairValueFutureAmortizationExpenseYearFive" id="paa_EquityBasedCompensationFairValueFutureAmortizationExpenseYearFive" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="EquityBasedCompensationFairValueFutureAmortizationExpenseYearFour" id="paa_EquityBasedCompensationFairValueFutureAmortizationExpenseYearFour" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="EquityBasedCompensationFairValueFutureAmortizationExpenseYearOne" id="paa_EquityBasedCompensationFairValueFutureAmortizationExpenseYearOne" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="EquityBasedCompensationFairValueFutureAmortizationExpenseYearThree" id="paa_EquityBasedCompensationFairValueFutureAmortizationExpenseYearThree" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="EquityBasedCompensationFairValueFutureAmortizationExpenseYearTwo" id="paa_EquityBasedCompensationFairValueFutureAmortizationExpenseYearTwo" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="EquityBasedCompensationPlanClassBUnitsOfPlainsAAPLPMember" id="paa_EquityBasedCompensationPlanClassBUnitsOfPlainsAAPLPMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="EquityBasedCompensationPlanAAPManagementUnitsPolicyTextBlock" id="paa_EquityBasedCompensationPlanAAPManagementUnitsPolicyTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="EstimatedSizeOfRelease" id="paa_EstimatedSizeOfRelease" type="num:volumeItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ExpenseForWithholdingTaxes" id="paa_ExpenseForWithholdingTaxes" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetsLiabilitiesDerivativeEnteredInto" id="paa_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetsLiabilitiesDerivativeEnteredInto" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisDerivativeNetAssetLiabilityGainLossIncludedInEarningsPeriodIncreaseDecrease" id="paa_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisDerivativeNetAssetLiabilityGainLossIncludedInEarningsPeriodIncreaseDecrease" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="FieldOperatingCostsAndGeneralAndAdministrativeExpensesPolicyTextBlock" id="paa_FieldOperatingCostsAndGeneralAndAdministrativeExpensesPolicyTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="FieldOperatingSegmentMember" id="paa_FieldOperatingSegmentMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="FiveForwardStartingThirtyYearInterestRateSwapMember" id="paa_FiveForwardStartingThirtyYearInterestRateSwapMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ForeignDeferredTaxExpensesBenefitOnBookVersusTaxDifferences" id="paa_ForeignDeferredTaxExpensesBenefitOnBookVersusTaxDifferences" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="ForeignExchangeForwardContractsMaturingIn2014Member" id="paa_ForeignExchangeForwardContractsMaturingIn2014Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ForeignExchangeForwardContractsMaturingIn2013Member" id="paa_ForeignExchangeForwardContractsMaturingIn2013Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ForeignIncomeTaxExpenseBenefitAtForeignStatutoryRate" id="paa_ForeignIncomeTaxExpenseBenefitAtForeignStatutoryRate" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="ForeignPeriodTaxOnBookVersusTaxDifferences" id="paa_ForeignPeriodTaxOnBookVersusTaxDifferences" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="ForeignPeriodTaxOnPermanentBookVersusTaxDifferences" id="paa_ForeignPeriodTaxOnPermanentBookVersusTaxDifferences" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="ForeignTaxRate" id="paa_ForeignTaxRate" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ForwardStartingInterestRateSwapMember" id="paa_ForwardStartingInterestRateSwapMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="FrontierPipelineCompanyMember" id="paa_FrontierPipelineCompanyMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="GainLossOnForeignCurrencyCashFlowHedgesPretaxAccumulatedOtherComprehensiveIncome" id="paa_GainLossOnForeignCurrencyCashFlowHedgesPretaxAccumulatedOtherComprehensiveIncome" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element name="GainLossOnSaleOfLinefillAndBaseGas" id="paa_GainLossOnSaleOfLinefillAndBaseGas" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="GardendaleGatheringSystemAcquisitionMember" id="paa_GardendaleGatheringSystemAcquisitionMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="GeneralPartnerDistributionLevelOneMember" id="paa_GeneralPartnerDistributionLevelOneMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="GeneralPartnerDistributionLevelThreeMember" id="paa_GeneralPartnerDistributionLevelThreeMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="GeneralPartnerDistributionLevelTwoMember" id="paa_GeneralPartnerDistributionLevelTwoMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="GeneralPartnerExpensePolicyTextBlock" id="paa_GeneralPartnerExpensePolicyTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="GeneralPartnerIncentiveDistributionPaidOrToBePaidBasedOnCurrentPeriodEarnings" id="paa_GeneralPartnerIncentiveDistributionPaidOrToBePaidBasedOnCurrentPeriodEarnings" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="GeneralPartnerDistributionIncludingIncentiveDistributionPercentage" id="paa_GeneralPartnerDistributionIncludingIncentiveDistributionPercentage" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="GeneralPartnerDistributionPercentage" id="paa_GeneralPartnerDistributionPercentage" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="GeneralPartnerIncentiveDistributionThreshold" id="paa_GeneralPartnerIncentiveDistributionThreshold" type="num:perShareItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="GeneralPartnerOwnershipInterestInNetIncomeLossAfterIncentiveDistribution" id="paa_GeneralPartnerOwnershipInterestInNetIncomeLossAfterIncentiveDistribution" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="GoodwillPurchasePriceAccountingAndOtherAdjustments" id="paa_GoodwillPurchasePriceAccountingAndOtherAdjustments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="GrantDateFairValueOfOutstandingAAPManagementUnitsRollForward" id="paa_GrantDateFairValueOfOutstandingAAPManagementUnitsRollForward" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="IncomeNotSubjectToForeignTax" id="paa_IncomeNotSubjectToForeignTax" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="IncomeSubjectToForeignTax" id="paa_IncomeSubjectToForeignTax" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="InterestExpenseHedgedInventory" id="paa_InterestExpenseHedgedInventory" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="InventoryByCategoryAbstract" id="paa_InventoryByCategoryAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="InventoryCurrentAndNoncurrent" id="paa_InventoryCurrentAndNoncurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element name="InventoryLinefillAndBaseGasAndLongTermInventoryDisclosureTextBlock" id="paa_InventoryLinefillAndBaseGasAndLongTermInventoryDisclosureTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="InventoryLinefillAndBaseGasAndLongTermInventoryDisclosureAbstract" id="paa_InventoryLinefillAndBaseGasAndLongTermInventoryDisclosureAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="InventoryVolumesCurrent" id="paa_InventoryVolumesCurrent" type="num:volumeItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="InventoryVolumesLinefillAndBaseGas" id="paa_InventoryVolumesLinefillAndBaseGas" type="num:volumeItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="InventoryVolumesNoncurrent" id="paa_InventoryVolumesNoncurrent" type="num:volumeItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="InventoryWeightedAveragePricePerUnitCurrent" id="paa_InventoryWeightedAveragePricePerUnitCurrent" type="us-types:perUnitItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="InventoryWeightedAveragePricePerUnitLinefillAndBaseGas" id="paa_InventoryWeightedAveragePricePerUnitLinefillAndBaseGas" type="us-types:perUnitItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="InventoryWeightedAveragePricePerUnitNoncurrent" id="paa_InventoryWeightedAveragePricePerUnitNoncurrent" type="us-types:perUnitItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="LandAndOtherMember" id="paa_LandAndOtherMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="LiabilitiesAndPartnersCapitalAbstract" id="paa_LiabilitiesAndPartnersCapitalAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="LiabilitiesForOutstandingChecks" id="paa_LiabilitiesForOutstandingChecks" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element name="LimitedPartnersUnitPricePerUnit" id="paa_LimitedPartnersUnitPricePerUnit" type="num:perShareItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="LinefillAndBaseGas" id="paa_LinefillAndBaseGas" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element name="LongPositionOnNaturalGasContractsMember" id="paa_LongPositionOnNaturalGasContractsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="LongTermDebtWeightedAverageLife" id="paa_LongTermDebtWeightedAverageLife" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="LongTermIncentivePlansMember" id="paa_LongTermIncentivePlansMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="LongTermObligationsExcludedFromCalculationOfMaturities" id="paa_LongTermObligationsExcludedFromCalculationOfMaturities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element name="LossContingencyPenaltyOrFineAssessed" id="paa_LossContingencyPenaltyOrFineAssessed" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element name="MaintenanceCapital" id="paa_MaintenanceCapital" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="MarathonPetroleumCorporationMember" id="paa_MarathonPetroleumCorporationMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="MaturityDateExtensionPeriod" id="paa_MaturityDateExtensionPeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="MaximumAggregateCommonStockOfferPrice" id="paa_MaximumAggregateCommonStockOfferPrice" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element name="MaximumPercentageParticipationForDistributionInExcessOfThreshold" id="paa_MaximumPercentageParticipationForDistributionInExcessOfThreshold" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="May2013EquityDistributionAgreementMember" id="paa_May2013EquityDistributionAgreementMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="MississippiBusinessFinanceCorporationGulfOpportunityZoneIndustrialDevelopmentRevenueBondsSeries2009Member" id="paa_MississippiBusinessFinanceCorporationGulfOpportunityZoneIndustrialDevelopmentRevenueBondsSeries2009Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="MississippiBusinessFinanceCorporationGulfOpportunityZoneIndustrialDevelopmentRevenueBondsSeries2010Member" id="paa_MississippiBusinessFinanceCorporationGulfOpportunityZoneIndustrialDevelopmentRevenueBondsSeries2010Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="NGLMember" id="paa_NGLMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="NaturalGasMember" id="paa_NaturalGasMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="NetCashReceivedPaidForTerminatedHedgingInstruments" id="paa_NetCashReceivedPaidForTerminatedHedgingInstruments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="NetIncomeLossAvailableToLimitedPartnersAfterAdjustmentForTwoClassMethodForMLPsDiluted" id="paa_NetIncomeLossAvailableToLimitedPartnersAfterAdjustmentForTwoClassMethodForMLPsDiluted" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="NetIncomeLossAvailableToLimitedPartnersAfterAdjustmentForTwoClassMethodForMLPsBasic" id="paa_NetIncomeLossAvailableToLimitedPartnersAfterAdjustmentForTwoClassMethodForMLPsBasic" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="NetLongPositionOnCrudeOilDerivativeContractsMember" id="paa_NetLongPositionOnCrudeOilDerivativeContractsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="LongPositionOnNaturalGasSwapsContractsMember" id="paa_LongPositionOnNaturalGasSwapsContractsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="NetProceedsFromRepaymentsOfRevolvingCreditFacilities" id="paa_NetProceedsFromRepaymentsOfRevolvingCreditFacilities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="NetProceedsFromRepaymentsOfShortTermLetterOfCreditAndHedgedInventoryFacility" id="paa_NetProceedsFromRepaymentsOfShortTermLetterOfCreditAndHedgedInventoryFacility" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="NetProceedsFromRepaymentsOfSubsidiaryCreditFacilities" id="paa_NetProceedsFromRepaymentsOfSubsidiaryCreditFacilities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="NetShortTimeSpreadPositionOnAnticipatedCrudeOilLeaseGatheringPurchaseContractsMember" id="paa_NetShortTimeSpreadPositionOnAnticipatedCrudeOilLeaseGatheringPurchaseContractsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ShortNaturalGasPositionRelatedToAnticipatedNaturalGasSalesMember" id="paa_ShortNaturalGasPositionRelatedToAnticipatedNaturalGasSalesMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ShortPositionContractsRelatedToAnticipatedInventorySalesMember" id="paa_ShortPositionContractsRelatedToAnticipatedInventorySalesMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="PositionHedgingRiskOfNotUtilizingStorageCapacityMember" id="paa_PositionHedgingRiskOfNotUtilizingStorageCapacityMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="NonOfficerEmployeeLongTermIncentiveTrackingUnitPlanMember" id="paa_NonOfficerEmployeeLongTermIncentiveTrackingUnitPlanMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="NonmonetaryNotionalAmountOfPriceRiskDerivativesAveragePerDay" id="paa_NonmonetaryNotionalAmountOfPriceRiskDerivativesAveragePerDay" type="xbrli:decimalItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="NumberOfDaysRequiredForDistributionToUnitholdersAfterEndOfQuarter" id="paa_NumberOfDaysRequiredForDistributionToUnitholdersAfterEndOfQuarter" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="NumberOfInterestRateSwapsTerminateInAugust2014" id="paa_NumberOfInterestRateSwapsTerminateInAugust2014" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="NumberOfInterestRateSwapsTerminateInJune2014" id="paa_NumberOfInterestRateSwapsTerminateInJune2014" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="NumberOfOneYearExtensionsOfRevolvingCreditFacility" id="paa_NumberOfOneYearExtensionsOfRevolvingCreditFacility" type="xbrli:integerItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="NumberOfTermLoans" id="paa_NumberOfTermLoans" type="xbrli:integerItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="NumberOfPrincipalOwnersOfGeneralPartner" id="paa_NumberOfPrincipalOwnersOfGeneralPartner" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="NumberOfTerminatedInterestRateSwaps" id="paa_NumberOfTerminatedInterestRateSwaps" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="OccidentalPetroleumCorporationMember" id="paa_OccidentalPetroleumCorporationMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="OtherAcquisitionsIn2011Member" id="paa_OtherAcquisitionsIn2011Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="OtherAcquisitionsMember" id="paa_OtherAcquisitionsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="OtherAgreementsMember" id="paa_OtherAgreementsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="OtherAssetsNoncurrentGross" id="paa_OtherAssetsNoncurrentGross" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element name="OtherComprehensiveIncomePartnershipsPortionOfEquityInvestee" id="paa_OtherComprehensiveIncomePartnershipsPortionOfEquityInvestee" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="OtherConsolidatedEquityCompensationInformationAbstract" id="paa_OtherConsolidatedEquityCompensationInformationAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="OtherEquityOfferingsMember" id="paa_OtherEquityOfferingsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="OtherLongTermAssetsMember" id="paa_OtherLongTermAssetsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="OtherLongTermLiabilitiesMember" id="paa_OtherLongTermLiabilitiesMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="OtherNoncurrentLongTermDebt" id="paa_OtherNoncurrentLongTermDebt" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element name="OutstandingUnitsEarnedRollForward" id="paa_OutstandingUnitsEarnedRollForward" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="OutstandingUnitsRollForward" id="paa_OutstandingUnitsRollForward" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="PNGGOBondTermLoansMember" id="paa_PNGGOBondTermLoansMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="PNGTermLoanOneMember" id="paa_PNGTermLoanOneMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="PNGTermLoanTwoMember" id="paa_PNGTermLoanTwoMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="PNGLongTermIncentivePlanAwardsMember" id="paa_PNGLongTermIncentivePlanAwardsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="PNGMember" id="paa_PNGMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="PlainsGPHoldingsLPMember" id="paa_PlainsGPHoldingsLPMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="EquityAwardsMember" id="paa_EquityAwardsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="PNGGeneralPartnerMember" id="paa_PNGGeneralPartnerMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="AwardsWithAMinimumVestingDateOfAugust2016Member" id="paa_AwardsWithAMinimumVestingDateOfAugust2016Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="AwardsWithAMinimumVestingDateOfAugust2017Member" id="paa_AwardsWithAMinimumVestingDateOfAugust2017Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="AwardsWithAMinimumVestingDateOfAugust2018Member" id="paa_AwardsWithAMinimumVestingDateOfAugust2018Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="LiabilityAwardsMember" id="paa_LiabilityAwardsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="PNGSeniorUnsecuredCreditFacilityMember" id="paa_PNGSeniorUnsecuredCreditFacilityMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="PNGSeniorUnsecuredRevolvingCreditFacilityMember" id="paa_PNGSeniorUnsecuredRevolvingCreditFacilityMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="SpecialPAAAwardsMember" id="paa_SpecialPAAAwardsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="PartnerIncomeAllocationLineItems" id="paa_PartnerIncomeAllocationLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="PartnersCapitalAndDistributionLineItems" id="paa_PartnersCapitalAndDistributionLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="PartnersCapitalAndDistributionsTable" id="paa_PartnersCapitalAndDistributionsTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="PartnersCapitalIncreaseFromSubsidiaryStockIssuance" id="paa_PartnersCapitalIncreaseFromSubsidiaryStockIssuance" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="OtherInventoryMember" id="paa_OtherInventoryMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="PemexExploracionyProduccionMember" id="paa_PemexExploracionyProduccionMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="PerUnitImpactToNetIncomeLossPerOutstandingLimitedPartnershipUnitBasic" id="paa_PerUnitImpactToNetIncomeLossPerOutstandingLimitedPartnershipUnitBasic" type="num:perShareItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ConsolidatedDelawareActionMember" id="paa_ConsolidatedDelawareActionMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ConsolidatedTexasActionMember" id="paa_ConsolidatedTexasActionMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ConsolidatedFederalActionMember" id="paa_ConsolidatedFederalActionMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="PerUnitImpactToNetIncomeLossPerOutstandingLimitedPartnershipUnitDiluted" id="paa_PerUnitImpactToNetIncomeLossPerOutstandingLimitedPartnershipUnitDiluted" type="num:perShareItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="PercentageDistributionOfAvailableCash" id="paa_PercentageDistributionOfAvailableCash" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="PercentageOfFaceValueAtWhichSeniorNotesAreSold" id="paa_PercentageOfFaceValueAtWhichSeniorNotesAreSold" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="PipelineTariffActivitiesTruckingAndRelatedRevenues" id="paa_PipelineTariffActivitiesTruckingAndRelatedRevenues" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="PlainsEagleFordPipelineLLCMember" id="paa_PlainsEagleFordPipelineLLCMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="PrincipalOwnersOwnershipPercentageInterestInGeneralPartnership" id="paa_PrincipalOwnersOwnershipPercentageInterestInGeneralPartnership" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="PrincipalOwnersOwnershipPercentageInterestInGeneralPartnershipMaximumSizeOfSmallestOwnerInterest" id="paa_PrincipalOwnersOwnershipPercentageInterestInGeneralPartnershipMaximumSizeOfSmallestOwnerInterest" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="PropertyTaxAbatementMember" id="paa_PropertyTaxAbatementMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="PurchasesAndRelatedCosts" id="paa_PurchasesAndRelatedCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="PurchasesAndRelatedCostsMember" id="paa_PurchasesAndRelatedCostsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="PurchasesAndRelatedCostsPolicyTextBlock" id="paa_PurchasesAndRelatedCostsPolicyTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="RainbowPipelineReleaseMember" id="paa_RainbowPipelineReleaseMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="BaySpringsPipelineReleaseMember" id="paa_BaySpringsPipelineReleaseMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="RangeOfAnnualizedVestingDistributionAmountDollarsFrom1.35ToDollars1.55Member" id="paa_RangeOfAnnualizedVestingDistributionAmountDollarsFrom1.35ToDollars1.55Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="RangelandPipelineReleaseMember" id="paa_RangelandPipelineReleaseMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ReconciliationOfOperatingProfitLossFromSegmentsToNetIncomeAttributableToParentTableTextBlock" id="paa_ReconciliationOfOperatingProfitLossFromSegmentsToNetIncomeAttributableToParentTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ReductionInAllIncentiveDistributions" id="paa_ReductionInAllIncentiveDistributions" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="ReductionInFutureIncentiveDistributionsInNextTwelveMonths" id="paa_ReductionInFutureIncentiveDistributionsInNextTwelveMonths" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="ReductionInIncentiveDistributionsAbstract" id="paa_ReductionInIncentiveDistributionsAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="RelatedPartyOwnershipInterestInGeneralPartnerPercentage" id="paa_RelatedPartyOwnershipInterestInGeneralPartnerPercentage" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="RemediationCostsIncurredSinceBusinessAcquired" id="paa_RemediationCostsIncurredSinceBusinessAcquired" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="RevenuesNetMember" id="paa_RevenuesNetMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="SLCPipelineLLCMember" id="paa_SLCPipelineLLCMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="SaleOfStockConsiderationReceivedOnTransactionFromParent" id="paa_SaleOfStockConsiderationReceivedOnTransactionFromParent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="SaleOfStockNumberOfSharesIssuedToParentInTransaction" id="paa_SaleOfStockNumberOfSharesIssuedToParentInTransaction" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="SalesAndRelatedRevenues" id="paa_SalesAndRelatedRevenues" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="SalesAndRelatedRevenuesMember" id="paa_SalesAndRelatedRevenuesMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ScheduleOfCapitalUnitsIssuedDuringPeriodTableTextBlock" id="paa_ScheduleOfCapitalUnitsIssuedDuringPeriodTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ScheduleOfChangesInMinorityInterestInPartnersCapitalTableTextBlock" id="paa_ScheduleOfChangesInMinorityInterestInPartnersCapitalTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
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  <xsd:element name="ScheduleOfInventoryLinefillAndBaseGasAndLongTermInventoryTableTextBlock" id="paa_ScheduleOfInventoryLinefillAndBaseGasAndLongTermInventoryTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ScheduleOfLongLivedAssetsByGeographicalAreasTableTextBlock" id="paa_ScheduleOfLongLivedAssetsByGeographicalAreasTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ScheduleOfLongTermIncentivePlanAwardsOfSubsidiaryOutstandingAndExpectedToVestTableTextBlock" id="paa_ScheduleOfLongTermIncentivePlanAwardsOfSubsidiaryOutstandingAndExpectedToVestTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ScheduleOfLongTermIncentivePlanAwardsOutstandingAndExpectedToVestTableTextBlock" id="paa_ScheduleOfLongTermIncentivePlanAwardsOutstandingAndExpectedToVestTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ScheduleOfPerUnitImpactOfAdditionalParticipationInUndistributedEarningsToEarningsPerUnitBasicAndDilutedTableTextBlock" id="paa_ScheduleOfPerUnitImpactOfAdditionalParticipationInUndistributedEarningsToEarningsPerUnitBasicAndDilutedTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ScheduleOfRevenuesFromExternalCustomersByGeographicalAreasTableTextBlock" id="paa_ScheduleOfRevenuesFromExternalCustomersByGeographicalAreasTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAmortizationTableTextBlock" id="paa_ScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAmortizationTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ScheduleOfShareBasedCompensationClassBUnitsAwardActivityTableTextBlock" id="paa_ScheduleOfShareBasedCompensationClassBUnitsAwardActivityTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ScheduleOfShareBasedPaymentAwardsExpenseTableTextBlock" id="paa_ScheduleOfShareBasedPaymentAwardsExpenseTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="SegmentPipelineTariffActivitiesTruckingMember" id="paa_SegmentPipelineTariffActivitiesTruckingMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="SegmentSalesAndLogisticsMember" id="paa_SegmentSalesAndLogisticsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="SegmentStorageTerminallingProcessingMember" id="paa_SegmentStorageTerminallingProcessingMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="USDRailTerminalAcquisitionMember" id="paa_USDRailTerminalAcquisitionMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="SeniorNotesDueInDecember2013At5.63PercentMember" id="paa_SeniorNotesDueInDecember2013At5.63PercentMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="SeniorNotesDueInFebruary2021At5.00PercentMember" id="paa_SeniorNotesDueInFebruary2021At5.00PercentMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="SeniorNotesDueInJanuary2023At2.85PercentMember" id="paa_SeniorNotesDueInJanuary2023At2.85PercentMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="SeniorNotesDueInJanuary2043At4.30PercentMember" id="paa_SeniorNotesDueInJanuary2043At4.30PercentMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="SeniorNotesDueInJune2022At3.65PercentMember" id="paa_SeniorNotesDueInJune2022At3.65PercentMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="SeniorNotesDueInJune2042At5.15PercentMember" id="paa_SeniorNotesDueInJune2042At5.15PercentMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
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  <xsd:element name="SeniorNotesDueInSeptember2012At4.25PercentMember" id="paa_SeniorNotesDueInSeptember2012At4.25PercentMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
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  <xsd:element name="SeniorSecuredHedgedInventoryDebtFacilityMember" id="paa_SeniorSecuredHedgedInventoryDebtFacilityMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="SeniorUnsecuredRevolvingCreditFacilityMember" id="paa_SeniorUnsecuredRevolvingCreditFacilityMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="September2012ContinuousOfferingProgramMember" id="paa_September2012ContinuousOfferingProgramMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="March2013ContinuousOfferingProgramMember" id="paa_March2013ContinuousOfferingProgramMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
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  <xsd:element name="SettoonTowingMember" id="paa_SettoonTowingMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
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  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalSettlementFairValue" id="paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalSettlementFairValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
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  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestingInYearFour" id="paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestingInYearFour" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
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  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardPeriodPriorToEachVestingDateForWhichAverageAnnualizedDistributionThresholdMustBeMaintained" id="paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardPeriodPriorToEachVestingDateForWhichAverageAnnualizedDistributionThresholdMustBeMaintained" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
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  <xsd:element name="ShareBasedCompensationSharesAuthorizedUnderEquityCompensationPlansPeriodAfterDistributionEarned" id="paa_ShareBasedCompensationSharesAuthorizedUnderEquityCompensationPlansPeriodAfterDistributionEarned" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ShortPropanePositionContractsRelatedToSubsequentSaleOfProductMember" id="paa_ShortPropanePositionContractsRelatedToSubsequentSaleOfProductMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ShortTermBorrowingsRepaymentPeriod" id="paa_ShortTermBorrowingsRepaymentPeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="SouthernPinesAcquisitionMember" id="paa_SouthernPinesAcquisitionMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="StorageTerminalAndRailFacilitiesMember" id="paa_StorageTerminalAndRailFacilitiesMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
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  <xsd:element name="ReductionInIncentiveDistributionsPerQuarterIn2016" id="paa_ReductionInIncentiveDistributionsPerQuarterIn2016" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element name="TenForwardStartingThirtyYearInterestRateSwapMember" id="paa_TenForwardStartingThirtyYearInterestRateSwapMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="TexasNewMexicoMember" id="paa_TexasNewMexicoMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="August2014EquityDistributionAgreementMember" id="paa_August2014EquityDistributionAgreementMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="TotalEstimatedCostToCleanUpAndRemediateSiteBeforeInsuranceRecoveries" id="paa_TotalEstimatedCostToCleanUpAndRemediateSiteBeforeInsuranceRecoveries" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element name="TruckingEquipmentAndOtherMember" id="paa_TruckingEquipmentAndOtherMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
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  <xsd:element name="ShortWTIPositionContractsRelatedToSubsequentSaleOfProductMember" id="paa_ShortWTIPositionContractsRelatedToSubsequentSaleOfProductMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="WesternRefiningAcquisitionMember" id="paa_WesternRefiningAcquisitionMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
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  <xsd:element name="CapitalExpendituresRelatedToAssetsAcquired" id="paa_CapitalExpendituresRelatedToAssetsAcquired" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" />
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  <xsd:element name="NumberOfDerivativesHeldWithCreditRiskRelatedContingentFeatures" id="paa_NumberOfDerivativesHeldWithCreditRiskRelatedContingentFeatures" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="OffsettingAssetsLiabilitiesTable" id="paa_OffsettingAssetsLiabilitiesTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="OffsettingAssetsLiabilitiesLineItems" id="paa_OffsettingAssetsLiabilitiesLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="AnnualizedDistributionThresholdForVestingOfDistributionEquivalentRightsAssociatedWithAwards" id="paa_AnnualizedDistributionThresholdForVestingOfDistributionEquivalentRightsAssociatedWithAwards" type="num:perShareItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
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  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardVestedInPeriodCashSettled" id="paa_ShareBasedCompensationArrangementByShareBasedPaymentAwardVestedInPeriodCashSettled" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="KempRiverPipelineReleaseMember" id="paa_KempRiverPipelineReleaseMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
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  <xsd:element name="HedgedTransactionsProbableOfNotOccurringMember" id="paa_HedgedTransactionsProbableOfNotOccurringMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="TotalCostToCleanUpAndRemediateSiteBeforeInsuranceRecoveries" id="paa_TotalCostToCleanUpAndRemediateSiteBeforeInsuranceRecoveries" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="CostToCleanUpAndRemediateSiteBeforeInsuranceRecoveries" id="paa_CostToCleanUpAndRemediateSiteBeforeInsuranceRecoveries" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="NumberOfCommonUnitsOfParentIssuedPerUnitOfSubsidiaryOwned" id="paa_NumberOfCommonUnitsOfParentIssuedPerUnitOfSubsidiaryOwned" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="MinorityInterestOwnershipSharesHeldByNoncontrollingOwners" id="paa_MinorityInterestOwnershipSharesHeldByNoncontrollingOwners" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="SeniorNotesDue2023At3.85PercentMember" id="paa_SeniorNotesDue2023At3.85PercentMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="LineOfCreditAndCommercialPaperMember" id="paa_LineOfCreditAndCommercialPaperMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="PNGCommonUnitIssuanceMember" id="paa_PNGCommonUnitIssuanceMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="CommonUnitsMember" id="paa_CommonUnitsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="SubordinatedUnitsMember" id="paa_SubordinatedUnitsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ReductionInPerYearIncentiveDistributionRightsAbstract" id="paa_ReductionInPerYearIncentiveDistributionRightsAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ReductionPerYearInIncentiveDistributionRightsYearOne" id="paa_ReductionPerYearInIncentiveDistributionRightsYearOne" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element name="ReductionPerYearInIncentiveDistributionRightsYearTwo" id="paa_ReductionPerYearInIncentiveDistributionRightsYearTwo" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element name="ReductionPerYearInIncentiveDistributionRightsYearThree" id="paa_ReductionPerYearInIncentiveDistributionRightsYearThree" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element name="ReductionPerYearInIncentiveDistributionRightsThereafter" id="paa_ReductionPerYearInIncentiveDistributionRightsThereafter" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element name="ForeignExchangeForwardContractsAtTheRateCAD1.00ToUSD1.03MaturingIn2013Member" id="paa_ForeignExchangeForwardContractsAtTheRateCAD1.00ToUSD1.03MaturingIn2013Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ForeignExchangeForwardContractsAtTheRateCAD1.00ToUSD1.03MaturingIn2014Member" id="paa_ForeignExchangeForwardContractsAtTheRateCAD1.00ToUSD1.03MaturingIn2014Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ForeignExchangeForwardContractsAtTheRateCAD1.00ToUSD1.04MaturingIn2015Member" id="paa_ForeignExchangeForwardContractsAtTheRateCAD1.00ToUSD1.04MaturingIn2015Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ForeignExchangeForwardContractsAtTheRateCAD1.00ToUSD1.03Member" id="paa_ForeignExchangeForwardContractsAtTheRateCAD1.00ToUSD1.03Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ForeignExchangeForwardContractAtTheRateUSD1.00ToCAD1.04MaturingIn2014Member" id="paa_ForeignExchangeForwardContractAtTheRateUSD1.00ToCAD1.04MaturingIn2014Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="PartnersCapitalCommonUnitHolderUnitsOutstanding" id="paa_PartnersCapitalCommonUnitHolderUnitsOutstanding" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="ThirdQuarterDistributionFY2013Member" id="paa_ThirdQuarterDistributionFY2013Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="FourthQuarterDistributionFY2013Member" id="paa_FourthQuarterDistributionFY2013Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesPurchaseOfInterestByParentUnitsIssued" id="paa_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesPurchaseOfInterestByParentUnitsIssued" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="OrganizationLineItems" id="paa_OrganizationLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="TotalCasesFiledNumber" id="paa_TotalCasesFiledNumber" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="GrossMargin" id="paa_GrossMargin" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="SixForwardStartingThirtyYearInterestRateSwapMember" id="paa_SixForwardStartingThirtyYearInterestRateSwapMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="FourForwardStartingTenYearInterestRateSwapMember" id="paa_FourForwardStartingTenYearInterestRateSwapMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ReductionInIncentiveDistributions" id="paa_ReductionInIncentiveDistributions" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="ReductionInIncentiveDistributionsInFebruary2014" id="paa_ReductionInIncentiveDistributionsInFebruary2014" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element name="AmortizationExpenseOnOtherAssetsNoncurrent" id="paa_AmortizationExpenseOnOtherAssetsNoncurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="PNGTransactionGrantsMember" id="paa_PNGTransactionGrantsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ProceedsFromPaymentsForSalePurchaseOfInterestInSubsidiaries" id="paa_ProceedsFromPaymentsForSalePurchaseOfInterestInSubsidiaries" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="ForeignExchangeForwardContractsAtTheRateUSD1.00ToCAD1.11Member" id="paa_ForeignExchangeForwardContractsAtTheRateUSD1.00ToCAD1.11Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ForeignExchangeForwardContractsAtTheRateUSD1.00ToCAD1.10MaturingIn2014Member" id="paa_ForeignExchangeForwardContractsAtTheRateUSD1.00ToCAD1.10MaturingIn2014Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ForeignExchangeForwardContractsAtTheRateUSD1.00ToCAD1.10Member" id="paa_ForeignExchangeForwardContractsAtTheRateUSD1.00ToCAD1.10Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="BusinessAcquisitionsProFormaNetIncomeLossAllocatedToLimitedPartners" id="paa_BusinessAcquisitionsProFormaNetIncomeLossAllocatedToLimitedPartners" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="ForeignPeriodTaxOnPermanentBookVersusTaxDifferencesAndRateChanges" id="paa_ForeignPeriodTaxOnPermanentBookVersusTaxDifferencesAndRateChanges" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="NumberOfLongTermIncentivePlansThatAreConsolidatedIntoSinglePlan" id="paa_NumberOfLongTermIncentivePlansThatAreConsolidatedIntoSinglePlan" type="xbrli:integerItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="BridgeTexPipelineCompanyLLCMember" id="paa_BridgeTexPipelineCompanyLLCMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="EconomicEntityAxis" id="paa_EconomicEntityAxis" type="xbrli:stringItemType" substitutionGroup="xbrldt:dimensionItem" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="EconomicEntityDomain" id="paa_EconomicEntityDomain" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="MagellanMidstreamPartnersLPMember" id="paa_MagellanMidstreamPartnersLPMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="CrudeOilPipelineCapacity" id="paa_CrudeOilPipelineCapacity" type="xbrli:decimalItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="TermOfLockUpArrangement" id="paa_TermOfLockUpArrangement" type="xbrli:durationItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="PeriodForWhichOwnersAgreedToRefrainFromSaleOfOwnershipInterests" id="paa_PeriodForWhichOwnersAgreedToRefrainFromSaleOfOwnershipInterests" type="xbrli:durationItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="PlainsAAPLPMember" id="paa_PlainsAAPLPMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ScenarioPendingAcquisitionMember" id="paa_ScenarioPendingAcquisitionMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
</xsd:schema>
