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  <xs:element id="opi_ExtinguishmentOfDebtInExchangeForSeniorPriorityGuaranteedNotes" abstract="false" name="ExtinguishmentOfDebtInExchangeForSeniorPriorityGuaranteedNotes" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="opi_SupplementalDisclosureOfCashCashEquivalentsAndRestrictedCashAbstract" abstract="true" name="SupplementalDisclosureOfCashCashEquivalentsAndRestrictedCashAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="opi_BusinessAndPropertyManagementAgreementsTextBlock" abstract="false" name="BusinessAndPropertyManagementAgreementsTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="opi_BankruptcyPolicyPolicyTextBlock" abstract="false" name="BankruptcyPolicyPolicyTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="opi_LiabilitiesSubjectToCompromisePolicyPolicyTextBlock" abstract="false" name="LiabilitiesSubjectToCompromisePolicyPolicyTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="opi_ContractualInterestPolicyPolicyTextBlock" abstract="false" name="ContractualInterestPolicyPolicyTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="opi_ReorganizationItemsPolicyPolicyTextBlock" abstract="false" name="ReorganizationItemsPolicyPolicyTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="opi_LiabilitiesSubjectToCompromiseTableTextBlock" abstract="false" name="LiabilitiesSubjectToCompromiseTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="opi_ReorganizationItemsTableTextBlock" abstract="false" name="ReorganizationItemsTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="opi_ScheduleOfJointVenturesTableTextBlock" abstract="false" name="ScheduleOfJointVenturesTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="opi_A9.000SeniorSecuredNotesPayableDueInSeptember2029Member" abstract="true" name="A9.000SeniorSecuredNotesPayableDueInSeptember2029Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="opi_A12.000DebtorInPossessionTermLoanMember" abstract="true" name="A12.000DebtorInPossessionTermLoanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="opi_A10.00SeniorSecuredNotesPayableDueIn2031Member" abstract="true" name="A10.00SeniorSecuredNotesPayableDueIn2031Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="opi_A3.250SeniorSecuredNotesMember" abstract="true" name="A3.250SeniorSecuredNotesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="opi_A8.375SeniorSecuredNotesMember" abstract="true" name="A8.375SeniorSecuredNotesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="opi_A8.000SeniorUnsecuredNotesMember" abstract="true" name="A8.000SeniorUnsecuredNotesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="opi_A9.000SeniorSecuredNotesPayableDueInMarch2029Member" abstract="true" name="A9.000SeniorSecuredNotesPayableDueInMarch2029Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="opi_BusinessManagementAgreementMember" abstract="true" name="BusinessManagementAgreementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="opi_ReitManagementAndResearchLLCMember" abstract="true" name="ReitManagementAndResearchLLCMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="opi_RelatedPartyTransactionTermOfAgreement" abstract="false" name="RelatedPartyTransactionTermOfAgreement" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="opi_LongTermDebtReorganizedCommonStockPercentageOfClaimsReceivable" abstract="false" name="LongTermDebtReorganizedCommonStockPercentageOfClaimsReceivable" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="opi_LongTermDebtReorganizedCommonStockPercentDiscountOnPlanEquityValue" abstract="false" name="LongTermDebtReorganizedCommonStockPercentDiscountOnPlanEquityValue" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="opi_LongTermDebtReorganizedCommonStockAndWarrantsProRataPercentageReceivable" abstract="false" name="LongTermDebtReorganizedCommonStockAndWarrantsProRataPercentageReceivable" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="opi_LongTermDebtEquityRightsOfferingAmount" abstract="false" name="LongTermDebtEquityRightsOfferingAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="opi_LongTermDebtReorganizedCommonStockPercentageReceivable" abstract="false" name="LongTermDebtReorganizedCommonStockPercentageReceivable" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="opi_OtherGeneralUnsecuredClaimsAmount" abstract="false" name="OtherGeneralUnsecuredClaimsAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="opi_OtherGeneralUnsecuredClaimsReceivable" abstract="false" name="OtherGeneralUnsecuredClaimsReceivable" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="opi_RelatedPartyTransactionAnnualFee" abstract="false" name="RelatedPartyTransactionAnnualFee" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="opi_RelatedPartyTransactionAnnualFeePeriod" abstract="false" name="RelatedPartyTransactionAnnualFeePeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="opi_RelatedPartyTransactionPercentageOfReorganizedCommonEquityPayable" abstract="false" name="RelatedPartyTransactionPercentageOfReorganizedCommonEquityPayable" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="opi_MaximumThresholdPercentageOfOutstandingVotingSharesAfterBankruptcyTriggeringFreshStartReporting" abstract="false" name="MaximumThresholdPercentageOfOutstandingVotingSharesAfterBankruptcyTriggeringFreshStartReporting" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="opi_LiabilitiesSubjectToCompromiseDebt" abstract="false" name="LiabilitiesSubjectToCompromiseDebt" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="opi_LiabilitiesSubjectToCompromiseAccruedInterest" abstract="false" name="LiabilitiesSubjectToCompromiseAccruedInterest" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="opi_LiabilitiesSubjectToCompromiseAccountsPayableAndOtherLiabilities" abstract="false" name="LiabilitiesSubjectToCompromiseAccountsPayableAndOtherLiabilities" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="opi_InterestExpenseDebtPortionNotAccrued" abstract="false" name="InterestExpenseDebtPortionNotAccrued" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="opi_JointVentureProperty1Member" abstract="true" name="JointVentureProperty1Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="opi_NumberOfOperatingLeaseExecuted" abstract="false" name="NumberOfOperatingLeaseExecuted" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="opi_OperatingLeasesCommittedExpendituresOnLeasesExecutedInPeriodAreaOfLeasedProperty" abstract="false" name="OperatingLeasesCommittedExpendituresOnLeasesExecutedInPeriodAreaOfLeasedProperty" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:areaItemType"/>
  <xs:element id="opi_OperatingLeasesWeightedAverageLeaseTerm" abstract="false" name="OperatingLeasesWeightedAverageLeaseTerm" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="opi_OperatingLeasesCommittedExpendituresOnLeasesExecutedInPeriod" abstract="false" name="OperatingLeasesCommittedExpendituresOnLeasesExecutedInPeriod" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="opi_OperatingLeasesCommittedExpendituresOnLeasesExecutedInPeriodCommittedButUnspentTenantRelatedObligations" abstract="false" name="OperatingLeasesCommittedExpendituresOnLeasesExecutedInPeriodCommittedButUnspentTenantRelatedObligations" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="opi_RealEstateAggregateSalesPrice" abstract="false" name="RealEstateAggregateSalesPrice" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="opi_NumberOfJointVentures" abstract="false" name="NumberOfJointVentures" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="opi_ProsperityMetroPlazaMember" abstract="true" name="ProsperityMetroPlazaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="opi_TenantReimbursementIncome" abstract="false" name="TenantReimbursementIncome" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="opi_RealEstateRevenueNetMember" abstract="true" name="RealEstateRevenueNetMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="opi_USGovernmentStateGovernmentsAndOtherGovernmentMember" abstract="false" name="USGovernmentStateGovernmentsAndOtherGovernmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="opi_USGovernmentMember" abstract="true" name="USGovernmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="opi_NumberOfStatesInWhichRealEstatePropertiesHeld" abstract="false" name="NumberOfStatesInWhichRealEstatePropertiesHeld" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="opi_LongTermDebtTermsAxis" abstract="true" name="LongTermDebtTermsAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="opi_LongTermDebtTermsDomain" abstract="true" name="LongTermDebtTermsDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="opi_TrancheASubsequentDrawMember" abstract="true" name="TrancheASubsequentDrawMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="opi_TrancheBMember" abstract="true" name="TrancheBMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="opi_NumberOfPropertiesCollateralized" abstract="false" name="NumberOfPropertiesCollateralized" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="opi_AggregateGrossBookValueOfRealEstateAssetsCollateralized" abstract="false" name="AggregateGrossBookValueOfRealEstateAssetsCollateralized" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="opi_DebtInstrumentCovenantDistributionRateMaximum" abstract="false" name="DebtInstrumentCovenantDistributionRateMaximum" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="opi_WeightedAverageAnnualInterestRate" abstract="false" name="WeightedAverageAnnualInterestRate" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="opi_NumberOfBorrowersWithWaiverAgreements" abstract="false" name="NumberOfBorrowersWithWaiverAgreements" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="opi_DebtInstrumentAmountAvailableToBeDrawn" abstract="false" name="DebtInstrumentAmountAvailableToBeDrawn" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="opi_DebtInstrumentUpfrontFeePercentageCashCommitment" abstract="false" name="DebtInstrumentUpfrontFeePercentageCashCommitment" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="opi_DebtInstrumentUpfrontFeePercentageReorganizedCommonEquityCommitment" abstract="false" name="DebtInstrumentUpfrontFeePercentageReorganizedCommonEquityCommitment" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="opi_DebtInstrumentCapitalCommitmentFeePercentage" abstract="false" name="DebtInstrumentCapitalCommitmentFeePercentage" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="opi_DebtInstrumentExitFeePercentage" abstract="false" name="DebtInstrumentExitFeePercentage" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="opi_DebtInstrumentVoluntaryPrepaymentFeePercentage" abstract="false" name="DebtInstrumentVoluntaryPrepaymentFeePercentage" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="opi_A2650SeniorUnsecuredNotesMember" abstract="true" name="A2650SeniorUnsecuredNotesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="opi_A2400SeniorUnsecuredNotesMember" abstract="true" name="A2400SeniorUnsecuredNotesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="opi_A3450SeniorUnsecuredNotesMember" abstract="true" name="A3450SeniorUnsecuredNotesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="opi_A6.375SeniorUnsecuredNotesMember" abstract="true" name="A6.375SeniorUnsecuredNotesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="opi_SeniorNotesAndMortgagesMember" abstract="true" name="SeniorNotesAndMortgagesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="opi_NumberOfEmployees" abstract="false" name="NumberOfEmployees" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="opi_NumberOfAgreements" abstract="false" name="NumberOfAgreements" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="opi_PropertyManagementAgreementMember" abstract="true" name="PropertyManagementAgreementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="opi_PropertyManagementAgreementPropertyManagementFeesMember" abstract="true" name="PropertyManagementAgreementPropertyManagementFeesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="opi_PropertyManagementAgreementConstructionSupervisionFeesMember" abstract="true" name="PropertyManagementAgreementConstructionSupervisionFeesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="opi_ExpenseReimbursementMember" abstract="true" name="ExpenseReimbursementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="opi_ExpenseReimbursementPropertyLevelExpensesMember" abstract="true" name="ExpenseReimbursementPropertyLevelExpensesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="opi_ExpenseReimbursementOtherReimbursedExpensesMember" abstract="true" name="ExpenseReimbursementOtherReimbursedExpensesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="opi_RelatedPartyTransactionAmortizationOfLiability" abstract="false" name="RelatedPartyTransactionAmortizationOfLiability" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="opi_RelatedPartyReimbursementExpense" abstract="false" name="RelatedPartyReimbursementExpense" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="opi_SonestaInternationalHotelsCorporationMember" abstract="true" name="SonestaInternationalHotelsCorporationMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="opi_ManagementAgreementPriorityReturnMember" abstract="true" name="ManagementAgreementPriorityReturnMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="opi_ManagementBrandPromotionAndLoyaltyFeesMember" abstract="true" name="ManagementBrandPromotionAndLoyaltyFeesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="opi_ManagementAgreementRealizedReturnMember" abstract="true" name="ManagementAgreementRealizedReturnMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="opi_SonestaManagementAgreementPeriodOneMember" abstract="true" name="SonestaManagementAgreementPeriodOneMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="opi_SonestaManagementAgreementPeriodTwoMember" abstract="true" name="SonestaManagementAgreementPeriodTwoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="opi_SonestaManagementAgreementPeriodThreeMember" abstract="true" name="SonestaManagementAgreementPeriodThreeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="opi_WorkingCapitalMember" abstract="true" name="WorkingCapitalMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="opi_AssetManagementAmortizationMember" abstract="true" name="AssetManagementAmortizationMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="opi_NumberOfAgreementsWithRmrLlc" abstract="false" name="NumberOfAgreementsWithRmrLlc" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="opi_RelatedPartyTransactionNumberOfRenewalOptions" abstract="false" name="RelatedPartyTransactionNumberOfRenewalOptions" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="opi_RelatedPartyTransactionRenewalTerm" abstract="false" name="RelatedPartyTransactionRenewalTerm" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="opi_RelatedPartyTransactionPriorityReturnIncreasePercentOfCapitalExpenditures" abstract="false" name="RelatedPartyTransactionPriorityReturnIncreasePercentOfCapitalExpenditures" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="opi_RelatedPartyTransactionMaximumPriorityReturnOfPriorYearPriorityReturn" abstract="false" name="RelatedPartyTransactionMaximumPriorityReturnOfPriorYearPriorityReturn" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="opi_RelatedPartyTransactionRequiredEscrowDepositPercentOfGrossRevenues" abstract="false" name="RelatedPartyTransactionRequiredEscrowDepositPercentOfGrossRevenues" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="opi_RelatedPartyTransactionRequiredEscrowDeposit" abstract="false" name="RelatedPartyTransactionRequiredEscrowDeposit" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="opi_RelatedPartyTransactionBaseManageFeePercentOfGrossRevenues" abstract="false" name="RelatedPartyTransactionBaseManageFeePercentOfGrossRevenues" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="opi_RelatedPartyTransactionIncentiveFeePercentOfNetOperatingProfit" abstract="false" name="RelatedPartyTransactionIncentiveFeePercentOfNetOperatingProfit" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="opi_RelatedPartyTransactionBrandPromotionFeePercentOfGrossRevenues" abstract="false" name="RelatedPartyTransactionBrandPromotionFeePercentOfGrossRevenues" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="opi_RelatedPartyTransactionLoyaltyFeePercentOfRoomRevenues" abstract="false" name="RelatedPartyTransactionLoyaltyFeePercentOfRoomRevenues" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="opi_RelatedPartyTransactionLoyaltyFeePercentOfQualifiedRoomRevenues" abstract="false" name="RelatedPartyTransactionLoyaltyFeePercentOfQualifiedRoomRevenues" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
</xs:schema>
