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  <xs:element id="hr_AreaCoveredUnderRealEstateInvestmentSoldInMeasurementUnits" abstract="false" name="AreaCoveredUnderRealEstateInvestmentSoldInMeasurementUnits" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types1:areaItemType"/>
  <xs:element id="hr_NumberOfPropertiesClassifiedAsHeldForSale" abstract="false" name="NumberOfPropertiesClassifiedAsHeldForSale" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="hr_LeaseIntangibles" abstract="false" name="LeaseIntangibles" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="hr_ImpairmentChargeOnRealEstateAssetsHeldForSale" abstract="false" name="ImpairmentChargeOnRealEstateAssetsHeldForSale" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="hr_LessorOperatingLeasePaymenttobeReceivedafterYearFour" abstract="false" name="LessorOperatingLeasePaymenttobeReceivedafterYearFour" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="hr_SquareFeetSubjecttoGroundLeases" abstract="false" name="SquareFeetSubjecttoGroundLeases" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:areaItemType"/>
  <xs:element id="hr_NumberofGroundLeasesPrepaid" abstract="false" name="NumberofGroundLeasesPrepaid" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="hr_AmortizationofPrepaidRent" abstract="false" name="AmortizationofPrepaidRent" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="hr_NumberofGroundLeasesExcludingPrepaidLeases" abstract="false" name="NumberofGroundLeasesExcludingPrepaidLeases" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="hr_LesseeOperatingLeaseLiabilityToBePaidAfterYearFour" abstract="false" name="LesseeOperatingLeaseLiabilityToBePaidAfterYearFour" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="hr_FinanceLeaseLiabilityToBePaidAfterYearFour" abstract="false" name="FinanceLeaseLiabilityToBePaidAfterYearFour" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="hr_FinanceLeasePrincipalOnlyPayments" abstract="false" name="FinanceLeasePrincipalOnlyPayments" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="hr_UnsecuredCreditFacilityOneMember" abstract="true" name="UnsecuredCreditFacilityOneMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="hr_TermLoanDueMay2025Member" abstract="true" name="TermLoanDueMay2025Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="hr_TermLoanDueJuly2024Member" abstract="true" name="TermLoanDueJuly2024Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="hr_TermLoanDue2025Member" abstract="true" name="TermLoanDue2025Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="hr_TermLoandue2026Member" abstract="true" name="TermLoandue2026Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="hr_TermLoanDue2027Member" abstract="true" name="TermLoanDue2027Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="hr_TermLoanDue2028Member" abstract="true" name="TermLoanDue2028Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="hr_SeniorNotesdue2025Member" abstract="true" name="SeniorNotesdue2025Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="hr_SeniorNotesDue2026Member" abstract="true" name="SeniorNotesDue2026Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="hr_SeniorNotesDue2027Member" abstract="true" name="SeniorNotesDue2027Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="hr_SeniorNotesdue2028Member" abstract="true" name="SeniorNotesdue2028Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="hr_SeniorNotesDue2030NetOfDiscountAndIssuanceCostsMember" abstract="true" name="SeniorNotesDue2030NetOfDiscountAndIssuanceCostsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="hr_SeniorNotesdue2030Member" abstract="true" name="SeniorNotesdue2030Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="hr_SeniorNotesDue2031Member" abstract="true" name="SeniorNotesDue2031Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="hr_SeniorNotesDue2031NetOfDiscountAndIssuanceCostsMember" abstract="true" name="SeniorNotesDue2031NetOfDiscountAndIssuanceCostsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="hr_MortgageNotesPayableNetMember" abstract="true" name="MortgageNotesPayableNetMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="hr_DebtInstrumentExtensionPeriodForMaturityDate" abstract="false" name="DebtInstrumentExtensionPeriodForMaturityDate" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="hr_ExtinguishmentOfDebtEncumberedSquareFootage" abstract="false" name="ExtinguishmentOfDebtEncumberedSquareFootage" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types1:areaItemType"/>
  <xs:element id="hr_InterestRateSwapExpiringMay12026Member" abstract="true" name="InterestRateSwapExpiringMay12026Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="hr_InterestRateSwapExpiringJune12026Member" abstract="true" name="InterestRateSwapExpiringJune12026Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="hr_InterestRateSwapExpiringDecember12026Member" abstract="true" name="InterestRateSwapExpiringDecember12026Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="hr_InterestRateSwapExpiringJune12027Member" abstract="true" name="InterestRateSwapExpiringJune12027Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="hr_InterestRateSwapExpiringDecember12027Member" abstract="true" name="InterestRateSwapExpiringDecember12027Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="hr_ActiveInterestRateSwapsMember" abstract="true" name="ActiveInterestRateSwapsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="hr_SettledInterestRateSwapsMember" abstract="true" name="SettledInterestRateSwapsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="hr_ActiveDevelopmentPropertiesMember" abstract="true" name="ActiveDevelopmentPropertiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="hr_RedevelopmentPropertiesMember" abstract="true" name="RedevelopmentPropertiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="hr_CompletedDevelpomentAndRedevelopmentPropertiesMember" abstract="true" name="CompletedDevelpomentAndRedevelopmentPropertiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="hr_ConstructionActivityTotalFundingDuringthePeriod" abstract="false" name="ConstructionActivityTotalFundingDuringthePeriod" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="hr_ReconciliationOfBeginningAndEndingCommonStockOutstandingRollForward" abstract="true" name="ReconciliationOfBeginningAndEndingCommonStockOutstandingRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="hr_OperatingPartnershipPerformanceUnitsMember" abstract="true" name="OperatingPartnershipPerformanceUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="hr_NonVestedStockAwardMember" abstract="true" name="NonVestedStockAwardMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="hr_ExecutiveIncentiveProgramMember" abstract="true" name="ExecutiveIncentiveProgramMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="hr_LTIPSeriesCUnitsMember" abstract="true" name="LTIPSeriesCUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="hr_StockIncentivePlanMember" abstract="true" name="StockIncentivePlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="hr_LTIPSeriesDUnitsMember" abstract="true" name="LTIPSeriesDUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="hr_OtherMembersOfSeniorManagementMember" abstract="true" name="OtherMembersOfSeniorManagementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="hr_StockIssuanceProgramAxis" abstract="true" name="StockIssuanceProgramAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="hr_StockIssuanceProgramDomain" abstract="true" name="StockIssuanceProgramDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="hr_PerformanceConditionsMember" abstract="true" name="PerformanceConditionsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="hr_MarketCondition2Member" abstract="true" name="MarketCondition2Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="hr_DirectorsMember" abstract="true" name="DirectorsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="hr_TreasuryStockValueAcquiredCostMethodExcludingCommissions" abstract="false" name="TreasuryStockValueAcquiredCostMethodExcludingCommissions" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="hr_StockRepurchaseProgramAuthorizedAdditionalAmount" abstract="false" name="StockRepurchaseProgramAuthorizedAdditionalAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="hr_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantedInPeriodTotalFairValue" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantedInPeriodTotalFairValue" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="hr_PercentageOfRestrictedStockUnits" abstract="false" name="PercentageOfRestrictedStockUnits" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="hr_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardPerformancePeriod" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardPerformancePeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="hr_IncrementalCommonSharesAttributableToDilutiveEffectOfOPUnits" abstract="false" name="IncrementalCommonSharesAttributableToDilutiveEffectOfOPUnits" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="hr_NetIncomeLossfromContinuingOperationsAvailabletoCommonStockholdersBasic" abstract="false" name="NetIncomeLossfromContinuingOperationsAvailabletoCommonStockholdersBasic" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="hr_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedStockPrice" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedStockPrice" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:perShareItemType"/>
  <xs:element id="hr_EmployeeServiceShareBasedCompensationNonvestedAwardsCompensationCostNotYetRecognizedRemainderOfFiscalYear" abstract="false" name="EmployeeServiceShareBasedCompensationNonvestedAwardsCompensationCostNotYetRecognizedRemainderOfFiscalYear" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="hr_EmployeeServiceShareBasedCompensationNonvestedAwardsCompensationCostNotYetRecognizedNextTwelveMonths" abstract="false" name="EmployeeServiceShareBasedCompensationNonvestedAwardsCompensationCostNotYetRecognizedNextTwelveMonths" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="hr_EmployeeServiceShareBasedCompensationNonVestedAwardsCompensationCostNotYetRecognizedYearTwo" abstract="false" name="EmployeeServiceShareBasedCompensationNonVestedAwardsCompensationCostNotYetRecognizedYearTwo" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="hr_EmployeeServiceShareBasedCompensationNonVestedAwardsCompensationCostNotYetRecognizedYearThree" abstract="false" name="EmployeeServiceShareBasedCompensationNonVestedAwardsCompensationCostNotYetRecognizedYearThree" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="hr_EmployeeServiceShareBasedCompensationNonVestedAwardsCompensationCostNotYetRecognizedAfterYearFour" abstract="false" name="EmployeeServiceShareBasedCompensationNonVestedAwardsCompensationCostNotYetRecognizedAfterYearFour" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
</xs:schema>
