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  <xs:element id="dtm_MillenniumPipelineMember" abstract="true" name="MillenniumPipelineMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="dtm_GainLossOnExtinguishmentOfDebtBeforeWriteOffOfDebtIssuanceCostAndDebtDiscount" abstract="false" name="GainLossOnExtinguishmentOfDebtBeforeWriteOffOfDebtIssuanceCostAndDebtDiscount" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="dtm_FinancingReceivableCreditQualityIndicatorNumberOfInternalGrades" abstract="false" name="FinancingReceivableCreditQualityIndicatorNumberOfInternalGrades" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="dtm_WellsAndWellEquipmentMember" abstract="true" name="WellsAndWellEquipmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="dtm_VariableInterestEntityPrimaryBeneficiaryStonewallGasGatheringLateralPipelineMember" abstract="true" name="VariableInterestEntityPrimaryBeneficiaryStonewallGasGatheringLateralPipelineMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="dtm_DebtInstrumentCovenantConsolidatedNetLeverageRatioMaximum" abstract="false" name="DebtInstrumentCovenantConsolidatedNetLeverageRatioMaximum" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="dtm_A2021Member" abstract="true" name="A2021Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="dtm_PaymentToAcquireEquityMethodInvestment" abstract="false" name="PaymentToAcquireEquityMethodInvestment" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="dtm_LandAndOtherNonDepreciableAssetsMember" abstract="true" name="LandAndOtherNonDepreciableAssetsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="dtm_AuditInformationAbstract" abstract="true" name="AuditInformationAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="dtm_PaymentsToSettleAccountsPayableAndAccountsReceivablesNet" abstract="false" name="PaymentsToSettleAccountsPayableAndAccountsReceivablesNet" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="dtm_OriginationRepaymentOfNotesReceivableFromAffiliates" abstract="false" name="OriginationRepaymentOfNotesReceivableFromAffiliates" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="dtm_GeneralPlantMember" abstract="true" name="GeneralPlantMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="dtm_VectorPipelineMember" abstract="true" name="VectorPipelineMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="dtm_SpecificReviewOfProbableFutureCollectionsBasedOnReceivableBalancesThresholdDuration" abstract="false" name="SpecificReviewOfProbableFutureCollectionsBasedOnReceivableBalancesThresholdDuration" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="dtm_NEXUSGasTransmissionLLCMember" abstract="true" name="NEXUSGasTransmissionLLCMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="dtm_DebtInstrumentCovenantDebtServiceCoverageRatioMinimum" abstract="false" name="DebtInstrumentCovenantDebtServiceCoverageRatioMinimum" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="dtm_LeasesWeightedAverageDiscountRateAbstract" abstract="true" name="LeasesWeightedAverageDiscountRateAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="dtm_April20224300SeniorSecuredNotesDue2032Member" abstract="true" name="April20224300SeniorSecuredNotesDue2032Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="dtm_DeferredIncomeTaxAssetsAndLiabilitiesNetAbstract" abstract="true" name="DeferredIncomeTaxAssetsAndLiabilitiesNetAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="dtm_June2021VariableRateTermLoanDue2028Member" abstract="true" name="June2021VariableRateTermLoanDue2028Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="dtm_DeferredTaxAssetsLiabilities" abstract="false" name="DeferredTaxAssetsLiabilities" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="dtm_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAllowableUnderThePlan" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAllowableUnderThePlan" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="dtm_NEXUSSeniorUnsecuredNotesMember" abstract="true" name="NEXUSSeniorUnsecuredNotesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="dtm_DebtInstrumentDividendRestrictionsRemainingCapacityAmount" abstract="false" name="DebtInstrumentDividendRestrictionsRemainingCapacityAmount" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="dtm_WeightedAverageRemainingLeaseTermAbstract" abstract="true" name="WeightedAverageRemainingLeaseTermAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="dtm_SECSchedule1209ValuationAllowancesAndReservesAdditionsChargeToCostAndExpenseAndOtherAccount" abstract="false" name="SECSchedule1209ValuationAllowancesAndReservesAdditionsChargeToCostAndExpenseAndOtherAccount" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="dtm_DebtInstrumentCovenantDebtServiceCoverageRatio" abstract="false" name="DebtInstrumentCovenantDebtServiceCoverageRatio" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="dtm_OtherExpensesNet" abstract="false" name="OtherExpensesNet" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="dtm_FinancingReceivableExcludingAccruedInterestOriginatedTwoOrMoreYearsBeforeCurrentFiscalYear" abstract="false" name="FinancingReceivableExcludingAccruedInterestOriginatedTwoOrMoreYearsBeforeCurrentFiscalYear" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="dtm_PaymentsToAcquirePropertyPlantAndEquipmentAndPaymentsToAcquireBusinessesNetOfCashAcquired" abstract="false" name="PaymentsToAcquirePropertyPlantAndEquipmentAndPaymentsToAcquireBusinessesNetOfCashAcquired" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="dtm_LongTermDebtMaturityAfterYearFour" abstract="false" name="LongTermDebtMaturityAfterYearFour" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="dtm_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsSettledInPeriod" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsSettledInPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="dtm_SeparationRelatedTransactionCosts" abstract="false" name="SeparationRelatedTransactionCosts" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="dtm_WriteOffOfDeferredDebtIssuanceCostAndDebtDiscount" abstract="false" name="WriteOffOfDeferredDebtIssuanceCostAndDebtDiscount" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="dtm_CustomerBMember" abstract="true" name="CustomerBMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="dtm_OtherAccountingPoliciesTableTextBlock" abstract="false" name="OtherAccountingPoliciesTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="dtm_ContractWithCustomerLiabilityIncreaseFromCashReceipts" abstract="false" name="ContractWithCustomerLiabilityIncreaseFromCashReceipts" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="dtm_PipelineSegmentMember" abstract="true" name="PipelineSegmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="dtm_RightOfUseAssetsObtainedInExchangeForLeaseLiabilityAbstract" abstract="true" name="RightOfUseAssetsObtainedInExchangeForLeaseLiabilityAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="dtm_CashPaidForAmountsIncludedInMeasurementOfLeaseLiabilitiesAbstract" abstract="true" name="CashPaidForAmountsIncludedInMeasurementOfLeaseLiabilitiesAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="dtm_DebtInstrumentCovenantConsolidatedNetLeverageRatio" abstract="false" name="DebtInstrumentCovenantConsolidatedNetLeverageRatio" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="dtm_ChangeInContractWithCustomerLiabilityRollForward" abstract="true" name="ChangeInContractWithCustomerLiabilityRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="dtm_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueSettled" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueSettled" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
</xs:schema>
