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  <element id="cli_SixBeckerEightyFiveLivingstonSeventyFiveLivingstonAndTwentyWaterviewMember" name="SixBeckerEightyFiveLivingstonSeventyFiveLivingstonAndTwentyWaterviewMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_FourSylvanMember" name="FourSylvanMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_TenIndependenceMember" name="TenIndependenceMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_FourBeckerMember" name="FourBeckerMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_FiveBeckerMember" name="FiveBeckerMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_FiftyOneImcloneMember" name="FiftyOneImcloneMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_VariousMember" name="VariousMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_HarborsidePlazaFiveMember" name="HarborsidePlazaFiveMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_OneHundredWalnutAvenueMember" name="OneHundredWalnutAvenueMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_OneRiverCenterMember" name="OneRiverCenterMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_SoundviewPlazaMember" name="SoundviewPlazaMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_IncomeLossFromContinuingOperationsDiluted" name="IncomeLossFromContinuingOperationsDiluted" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
  <element id="cli_ScheduleOfFutureMinimumRentalsUnderNonCancelableOperatingLeaseTextBlock" name="ScheduleOfFutureMinimumRentalsUnderNonCancelableOperatingLeaseTextBlock" nillable="true" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_ScheduleOfDeferredChargesAndOtherAssetsTextBlock" name="ScheduleOfDeferredChargesAndOtherAssetsTextBlock" nillable="true" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_ProjectTerm" name="ProjectTerm" nillable="true" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_PaymentsInLieuOfPropertyTaxes" name="PaymentsInLieuOfPropertyTaxes" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <element id="cli_CommitmentsAndContingenciesTable" name="CommitmentsAndContingenciesTable" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" abstract="true" xbrli:periodType="duration" />
  <element id="cli_AreaAxis" name="AreaAxis" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrldt:dimensionItem" abstract="true" xbrli:periodType="duration" />
  <element id="cli_AreaDomain" name="AreaDomain" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_HarborsidePlaza4AgreementMember" name="HarborsidePlaza4AgreementMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_HarborsidePlaza5AgreementMember" name="HarborsidePlaza5AgreementMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_ScheduleOfEstimatedUsefulLivesOfAssetsTextBlock" name="ScheduleOfEstimatedUsefulLivesOfAssetsTextBlock" nillable="true" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_OfficeAndOfficeFlexBuildingsMember" name="OfficeAndOfficeFlexBuildingsMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_HarborsideSouthPierMember" name="HarborsideSouthPierMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_GramercyAgreementMember" name="GramercyAgreementMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_TwelveVreelandMember" name="TwelveVreelandMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_BostonDowntownCrossingMember" name="BostonDowntownCrossingMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_GaleJeffersonMember" name="GaleJeffersonMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_MackGreenMember" name="MackGreenMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_NumberOfPropertySold" name="NumberOfPropertySold" nillable="true" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_ConstructionServicesMember" name="ConstructionServicesMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_PlazaEightAndNineAssociatesMember" name="PlazaEightAndNineAssociatesMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_RealEstatePropertyOwnedAndInvestmentInterest" name="RealEstatePropertyOwnedAndInvestmentInterest" nillable="true" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_RealEstatePropertyOwnedAndInvestmentInterestArea" name="RealEstatePropertyOwnedAndInvestmentInterestArea" nillable="true" type="num:areaItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_RealEstatePropertyByCategoriesAxis" name="RealEstatePropertyByCategoriesAxis" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrldt:dimensionItem" abstract="true" xbrli:periodType="duration" />
  <element id="cli_RealEstatePropertyByCategoriesDomain" name="RealEstatePropertyByCategoriesDomain" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_IndustrialAndWarehouseFacilitiesMember" name="IndustrialAndWarehouseFacilitiesMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_HotelsMember" name="HotelsMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_RealEstatePropertyOwnedOrInvestmentInterestNumberOfLocation" name="RealEstatePropertyOwnedOrInvestmentInterestNumberOfLocation" nillable="true" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_LIBORInterestRate" name="LIBORInterestRate" nillable="true" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" />
  <element id="cli_ScheduleOfSeniorUnsecuredNotesTableTextBlock" name="ScheduleOfSeniorUnsecuredNotesTableTextBlock" nillable="true" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_ScheduleOfSecuredDebtTableTextBlock" name="ScheduleOfSecuredDebtTableTextBlock" nillable="true" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_SecuredDebtNameOfProperty" name="SecuredDebtNameOfProperty" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_SecuredDebtLendingInstitution" name="SecuredDebtLendingInstitution" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_LongTermDebtPropertyNameAxis" name="LongTermDebtPropertyNameAxis" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrldt:dimensionItem" abstract="true" xbrli:periodType="duration" />
  <element id="cli_LongTermDebtPropertyNameDomain" name="LongTermDebtPropertyNameDomain" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_DebtInstrumentByPropertyNameTable" name="DebtInstrumentByPropertyNameTable" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" abstract="true" xbrli:periodType="duration" />
  <element id="cli_NineThousandTwoHundredEdmonstonRoadMember" name="NineThousandTwoHundredEdmonstonRoadMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_SixThousandThreeHundredFiveIvyLaneMember" name="SixThousandThreeHundredFiveIvyLaneMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_ThreeHundredNinetyFiveWestPassaicMember" name="ThreeHundredNinetyFiveWestPassaicMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_SixThousandThreeHundredOneIvyLaneMember" name="SixThousandThreeHundredOneIvyLaneMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_ThirtyFiveWaterviewBoulevardMember" name="ThirtyFiveWaterviewBoulevardMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_TwoHundredTenClayMember" name="TwoHundredTenClayMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_TwentyThreeMainStreetMember" name="TwentyThreeMainStreetMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_FiveHundredEightyOneMainStreetMember" name="FiveHundredEightyOneMainStreetMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_IncrementalBasisPointsOverEffectiveInterestRate" name="IncrementalBasisPointsOverEffectiveInterestRate" nillable="true" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_MortgagePropertyCarryingValue" name="MortgagePropertyCarryingValue" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" />
  <element id="cli_LongLivedAssets" name="LongLivedAssets" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" />
  <element id="cli_NetOperatingIncome" name="NetOperatingIncome" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
  <element id="cli_PaymentsInLieuOfPropertyTaxAsPercentageOfTotalProjectCost" name="PaymentsInLieuOfPropertyTaxAsPercentageOfTotalProjectCost" nillable="true" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_DeferredCostsGross" name="DeferredCostsGross" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" />
  <element id="cli_AccumulatedAmortizationLeasingAndFinancingCosts" name="AccumulatedAmortizationLeasingAndFinancingCosts" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" />
  <element id="cli_ScheduleOfUnsecuredCreditRatingOperatingPartnershipsTableTextBlock" name="ScheduleOfUnsecuredCreditRatingOperatingPartnershipsTableTextBlock" nillable="true" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_LineOfCreditFacilityLendingInstitutionsNumber" name="LineOfCreditFacilityLendingInstitutionsNumber" nillable="true" type="xbrli:positiveIntegerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_LineOfCreditFacilityByCategoryAxis" name="LineOfCreditFacilityByCategoryAxis" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrldt:dimensionItem" abstract="true" xbrli:periodType="duration" />
  <element id="cli_LineOfCreditFacilityByCategoryDomain" name="LineOfCreditFacilityByCategoryDomain" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_MoneyMarketLoanMember" name="MoneyMarketLoanMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_LineOfCreditFacilityMaturityPeriod" name="LineOfCreditFacilityMaturityPeriod" nillable="true" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_ScheduleOfEquityMethodInvestmentSummarizedFinancialInformationIncomeStatementTableTextBlock" name="ScheduleOfEquityMethodInvestmentSummarizedFinancialInformationIncomeStatementTableTextBlock" nillable="true" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_ScheduleOfEquityMethodInvestmentSummarizedFinancialInformationBalanceSheetTableTextBlock" name="ScheduleOfEquityMethodInvestmentSummarizedFinancialInformationBalanceSheetTableTextBlock" nillable="true" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_EquityMethodInvestmentSummarizedFinancialInformationOperatingAndOther" name="EquityMethodInvestmentSummarizedFinancialInformationOperatingAndOther" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
  <element id="cli_EquityMethodInvestmentSummarizedFinancialInformationDepreciationAndAmortization" name="EquityMethodInvestmentSummarizedFinancialInformationDepreciationAndAmortization" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
  <element id="cli_EquityMethodInvestmentSummarizedFinancialInformationInterestExpense" name="EquityMethodInvestmentSummarizedFinancialInformationInterestExpense" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
  <element id="cli_EquityMethodInvestmentSummarizedFinancialInformationRentalPropertyNet" name="EquityMethodInvestmentSummarizedFinancialInformationRentalPropertyNet" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" />
  <element id="cli_EquityMethodInvestmentSummarizedFinancialInformationOtherAssets" name="EquityMethodInvestmentSummarizedFinancialInformationOtherAssets" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" />
  <element id="cli_EquityMethodInvestmentSummarizedFinancialInformationSecuredDebt" name="EquityMethodInvestmentSummarizedFinancialInformationSecuredDebt" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" />
  <element id="cli_EstimatedCostOfProject" name="EstimatedCostOfProject" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <element id="cli_RealEstatePropertySubjectToLockUpAxis" name="RealEstatePropertySubjectToLockUpAxis" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrldt:dimensionItem" abstract="true" xbrli:periodType="duration" />
  <element id="cli_RealEstatePropertySubjectToLockUpDomain" name="RealEstatePropertySubjectToLockUpDomain" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_PropertyLockUpsMember" name="PropertyLockUpsMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_PropertyLockUpsExpiredMember" name="PropertyLockUpsExpiredMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_EquityMethodInvestmentSummarizedFinancialInformationOtherLiabilities" name="EquityMethodInvestmentSummarizedFinancialInformationOtherLiabilities" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" />
  <element id="cli_AreaOfPropertyInSquareFoot" name="AreaOfPropertyInSquareFoot" nillable="true" type="num:areaItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" />
  <element id="cli_HoldingAndDistributionPatternUnderOperatingAgreement" name="HoldingAndDistributionPatternUnderOperatingAgreement" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_NoncontrollingInterestInDiscontinuedOperations" name="NoncontrollingInterestInDiscontinuedOperations" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <element id="cli_OneGrandeCommonsMember" name="OneGrandeCommonsMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_InternalRateOfReturn" name="InternalRateOfReturn" nillable="true" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_RevolvingCreditFacilityAndOtherVariableRateMortgageDebtMember" name="RevolvingCreditFacilityAndOtherVariableRateMortgageDebtMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_FixedRateDebtAndOtherObligationsMember" name="FixedRateDebtAndOtherObligationsMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_PercentageOfSharingExcessOfAllocatedAmountsForEachPortfolioProperty" name="PercentageOfSharingExcessOfAllocatedAmountsForEachPortfolioProperty" nillable="true" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" />
  <element id="cli_PropertiesRestrictionForSaleExpirationPeriod" name="PropertiesRestrictionForSaleExpirationPeriod" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_PercentageRequirementOfTaxableIncomeToDistributeToShareholders" name="PercentageRequirementOfTaxableIncomeToDistributeToShareholders" nillable="true" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_CommonUnitsOutstanding" name="CommonUnitsOutstanding" nillable="true" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" />
  <element id="cli_LineOfCreditFacilityInSupportOfDebtInstrumentFairValueOfAmountOutstanding" name="LineOfCreditFacilityInSupportOfDebtInstrumentFairValueOfAmountOutstanding" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" />
  <element id="cli_ManagementLeasingAndOtherServicesFees" name="ManagementLeasingAndOtherServicesFees" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
  <element id="cli_NumberOfOwnedProperties" name="NumberOfOwnedProperties" nillable="true" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" />
  <element id="cli_VentureSaleOfRealEstate" name="VentureSaleOfRealEstate" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" />
  <element id="cli_MortgageLoansOnRealEstateBearingWeightedAverageFixedInterestRate" name="MortgageLoansOnRealEstateBearingWeightedAverageFixedInterestRate" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" />
  <element id="cli_LineOfCreditFacilityBidFeatureCurrentBorrowingCapacity" name="LineOfCreditFacilityBidFeatureCurrentBorrowingCapacity" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" />
  <element id="cli_RestrictedStockAwardsUnvestedSharesOutstandingPerformanceContingent" name="RestrictedStockAwardsUnvestedSharesOutstandingPerformanceContingent" nillable="true" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" />
  <element id="cli_MortgageLoanMaturityPeriod" name="MortgageLoanMaturityPeriod" nillable="true" type="invest:dateStringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_AcquisitionCost" name="AcquisitionCost" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
  <element id="cli_VenturePropertyAcquisitionCost" name="VenturePropertyAcquisitionCost" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
  <element id="cli_VentureGainLossOnSaleOfRealEstate" name="VentureGainLossOnSaleOfRealEstate" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" />
  <element id="cli_WeightedAverageFixedInterestRate" name="WeightedAverageFixedInterestRate" nillable="true" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" />
  <element id="cli_OperatingPartnershipLPMember" name="OperatingPartnershipLPMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_PreferredUnitValue" name="PreferredUnitValue" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" />
  <element id="cli_OperatingLeaseExpense" name="OperatingLeaseExpense" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <element id="cli_MackCaliRealtyCorporationStockholdersEquityTable" name="MackCaliRealtyCorporationStockholdersEquityTable" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" abstract="true" xbrli:periodType="duration" />
  <element id="cli_LiborInterestRate" name="LiborInterestRate" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_LoanCarryingAmount" name="LoanCarryingAmount" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" />
  <element id="cli_LoanMaturityDate" name="LoanMaturityDate" nillable="true" type="xbrli:dateItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_StockOptions" name="StockOptions" nillable="true" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_PropertyNetBookValue" name="PropertyNetBookValue" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <element id="cli_IncomeLossFromDiscontinuedOperationsAvailableToCommonShareholders" name="IncomeLossFromDiscontinuedOperationsAvailableToCommonShareholders" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
  <element id="cli_CommonUnitsRedeemedForCommonShares" name="CommonUnitsRedeemedForCommonShares" nillable="true" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_RebalanceOfOwnershipPercentage" name="RebalanceOfOwnershipPercentage" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
  <element id="cli_AreaOfConstructedBuilding" name="AreaOfConstructedBuilding" nillable="true" type="num:areaItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_DeliveryDateOfConstructedBuilding" name="DeliveryDateOfConstructedBuilding" nillable="true" type="invest:dateStringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_NumberOfPropertiesWithEncumberedCompanyMortgages" name="NumberOfPropertiesWithEncumberedCompanyMortgages" nillable="true" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_DeferredFinancingCostsPolicyTextBlock" name="DeferredFinancingCostsPolicyTextBlock" nillable="true" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_DeferredLeasingCostsPolicyTextBlock" name="DeferredLeasingCostsPolicyTextBlock" nillable="true" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_DividendsAndDistributionsPayablePolicyTextBlock" name="DividendsAndDistributionsPayablePolicyTextBlock" nillable="true" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_IssuanceCostsPolicyTextBlock" name="IssuanceCostsPolicyTextBlock" nillable="true" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_OtherComprehensiveIncomePolicyTextBlock" name="OtherComprehensiveIncomePolicyTextBlock" nillable="true" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_LineOfCreditFacilityExpandableMaximumBorrowingCapacity" name="LineOfCreditFacilityExpandableMaximumBorrowingCapacity" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" />
  <element id="cli_PreviousCreditFacilityMember" name="PreviousCreditFacilityMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_NoRatingsOrLessThanBbbMinusBaaThreeMember" name="NoRatingsOrLessThanBbbMinusBaaThreeMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_BbbMinusOrBaaThreeMember" name="BbbMinusOrBaaThreeMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_BbbOrBaaTwoCurrentMember" name="BbbOrBaaTwoCurrentMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_BbbPlusOrBaaOneMember" name="BbbPlusOrBaaOneMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_MinusOrThreeOrHigherMember" name="MinusOrThreeOrHigherMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_CommonUnitDistributionsPerUnitDeclared" name="CommonUnitDistributionsPerUnitDeclared" nillable="true" type="num:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_WriteOffOfPreferredStockIssuanceCost" name="WriteOffOfPreferredStockIssuanceCost" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <element id="cli_LongTermDebtLineItems" name="LongTermDebtLineItems" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <element id="cli_LineOfCreditFacilityExtensionPeriod" name="LineOfCreditFacilityExtensionPeriod" nillable="true" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_LineOfCreditFacilityByCategoryLineItems" name="LineOfCreditFacilityByCategoryLineItems" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <element id="cli_TreasuryYieldPeriod" name="TreasuryYieldPeriod" nillable="true" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_CouponInterestResetPeriod" name="CouponInterestResetPeriod" nillable="true" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_MortgagesLoansPayableAndOtherObligationsLineItems" name="MortgagesLoansPayableAndOtherObligationsLineItems" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <element id="cli_PercentVestedAfterTotalServicePeriod" name="PercentVestedAfterTotalServicePeriod" nillable="true" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_EmployeePreTaxContributionsVestedPercent" name="EmployeePreTaxContributionsVestedPercent" nillable="true" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_TwoTwoZeroZeroRenaissanceBoulevardMember" name="TwoTwoZeroZeroRenaissanceBoulevardMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_ConstructionAndDevelopmentCostsIncurred" name="ConstructionAndDevelopmentCostsIncurred" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <element id="cli_HarborsideResidentialProjectMember" name="HarborsideResidentialProjectMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_IronstateDevelopmentLlcMember" name="IronstateDevelopmentLlcMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_ThirdPartyOwnershipPercent" name="ThirdPartyOwnershipPercent" nillable="true" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" />
  <element id="cli_CapitalCreditReceivablePerSquareFoot" name="CapitalCreditReceivablePerSquareFoot" nillable="true" type="us-types:perUnitItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_MaximumPercentageOfRetainerFeeDirectorsMayElectToDeferToStockUnits" name="MaximumPercentageOfRetainerFeeDirectorsMayElectToDeferToStockUnits" nillable="true" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_TwoThousandEmployeePlanMember" name="TwoThousandEmployeePlanMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_TwoThousandDirectorPlanMember" name="TwoThousandDirectorPlanMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_MaximumPercentageOfOutstandingShareOwnedByRealEstateInvestmentTrust" name="MaximumPercentageOfOutstandingShareOwnedByRealEstateInvestmentTrust" nillable="true" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_StamfordSmLlcMember" name="StamfordSmLlcMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_ImpairmentCharge" name="ImpairmentCharge" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <element id="cli_RedBankCorporatePlazaMember" name="RedBankCorporatePlazaMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_PercentageOfLoanPrincipalSwapped" name="PercentageOfLoanPrincipalSwapped" nillable="true" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_OneJeffersonMember" name="OneJeffersonMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_AnnualCompoundReturnOnMembersCapitalContributions" name="AnnualCompoundReturnOnMembersCapitalContributions" nillable="true" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" />
  <element id="cli_PercentageOfDistributionToParentCompanyAndSubsidiary" name="PercentageOfDistributionToParentCompanyAndSubsidiary" nillable="true" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" />
  <element id="cli_MortgageLoanExtensionPeriod" name="MortgageLoanExtensionPeriod" nillable="true" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_InterestRateResetAxis" name="InterestRateResetAxis" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrldt:dimensionItem" abstract="true" xbrli:periodType="duration" />
  <element id="cli_InterestRateResetDomain" name="InterestRateResetDomain" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_CouponInterestRateResetOneMember" name="CouponInterestRateResetOneMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_CouponInterestRateResetTwoMember" name="CouponInterestRateResetTwoMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_EffectiveInterestRateResetPeriod" name="EffectiveInterestRateResetPeriod" nillable="true" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_CommitmentsAndContingenciesLineItems" name="CommitmentsAndContingenciesLineItems" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <element id="cli_HampshireMember" name="HampshireMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_MCJeffersonMember" name="MCJeffersonMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_ScheduleOfReconciliationOfSharesUsedInBasicEpsCalculationToSharesUsedInDilutedEpsCalculationTableTextBlock" name="ScheduleOfReconciliationOfSharesUsedInBasicEpsCalculationToSharesUsedInDilutedEpsCalculationTableTextBlock" nillable="true" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_AreaOfDisposedPropertyInSquareFoot" name="AreaOfDisposedPropertyInSquareFoot" nillable="true" type="num:areaItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" />
  <element id="cli_LineOfCreditFacilityBasisPointFacilityFee" name="LineOfCreditFacilityBasisPointFacilityFee" nillable="true" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" />
  <element id="cli_StockOptionActivityLineItems" name="StockOptionActivityLineItems" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <element id="cli_DistributionOfCashFlowToIndividualCompaniesPercentage" name="DistributionOfCashFlowToIndividualCompaniesPercentage" nillable="true" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_VestingRate" name="VestingRate" nillable="true" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_WyndhamMember" name="WyndhamMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_MezzLoanMember" name="MezzLoanMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_ClassPortfolioInStamfordConnecticutMember" name="ClassPortfolioInStamfordConnecticutMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_ClassOfficeSpaceMember" name="ClassOfficeSpaceMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_StamfordSMLLCMember" name="StamfordSMLLCMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_MortgageLoanOnRealEstateNumberOfExtensionOptions" name="MortgageLoanOnRealEstateNumberOfExtensionOptions" nillable="true" type="xbrli:positiveIntegerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_MoorestownNewJerseyMember" name="MoorestownNewJerseyMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_FourPointFiveZeroPercentSeniorUnsecuredNotesDueAprilEighteenthTwoThousandTwentyTwoMember" name="FourPointFiveZeroPercentSeniorUnsecuredNotesDueAprilEighteenthTwoThousandTwentyTwoMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_ResidentialSpaceMember" name="ResidentialSpaceMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_TwoThousandDirectorPlanAndDirectorPlanMember" name="TwoThousandDirectorPlanAndDirectorPlanMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_NetInvestmentInRentalPropertyAndRentalPropertyHeldForSale" name="NetInvestmentInRentalPropertyAndRentalPropertyHeldForSale" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" />
  <element id="cli_ShareBasedCompensationArrangementByShareBasedPaymentAwardValueOptionsForfeituresInPeriod" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardValueOptionsForfeituresInPeriod" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
  <element id="cli_NumberOfPropertiesHeldForSale" name="NumberOfPropertiesHeldForSale" nillable="true" type="xbrli:positiveIntegerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_ProfitSharingPercentage" name="ProfitSharingPercentage" nillable="true" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_TenOperatingPartnershipsMember" name="TenOperatingPartnershipsMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_SlGreenMember" name="SlGreenMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_EightOperatingPartnershipsMember" name="EightOperatingPartnershipsMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_ThresholdOfWhichExcessProceedsArePaidToThirdParty" name="ThresholdOfWhichExcessProceedsArePaidToThirdParty" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
  <element id="cli_TenantLeasesMember" name="TenantLeasesMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_SKFlorhamParkAssociatesLLCMember" name="SKFlorhamParkAssociatesLLCMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_ParticipationRightsMember" name="ParticipationRightsMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_FutureDevelopmentsMember" name="FutureDevelopmentsMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_MonthlyCashInvestmentWithoutRestrictionMaximum" name="MonthlyCashInvestmentWithoutRestrictionMaximum" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <element id="cli_DividendReinvestmentAndStockPurchasePlanMember" name="DividendReinvestmentAndStockPurchasePlanMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_IncreaseDecreaseInUnbilledRentReceivables" name="IncreaseDecreaseInUnbilledRentReceivables" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
  <element id="cli_RentalPropertyAbstract" name="RentalPropertyAbstract" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <element id="cli_RestrictedStockAwardVestingPeriod" name="RestrictedStockAwardVestingPeriod" nillable="true" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_CapitalizedDevelopmentConstructionSalariesAndOtherRelatedExpenses" name="CapitalizedDevelopmentConstructionSalariesAndOtherRelatedExpenses" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <element id="cli_EquityMethodInvestmentSummarizedFinancialInformationLoansReceivable" name="EquityMethodInvestmentSummarizedFinancialInformationLoansReceivable" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" />
  <element id="cli_DebtInstrumentPurchasePriceAsPercentageOfFaceAmount" name="DebtInstrumentPurchasePriceAsPercentageOfFaceAmount" nillable="true" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" />
  <element id="cli_NumberOfPropertiesUsedToCollateralizeMortgage" name="NumberOfPropertiesUsedToCollateralizeMortgage" nillable="true" type="xbrli:positiveIntegerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_LeasePeriod" name="LeasePeriod" nillable="true" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_NumberOfLeaseExtensionOptions" name="NumberOfLeaseExtensionOptions" nillable="true" type="xbrli:positiveIntegerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_LeasePeriodExtensionOption" name="LeasePeriodExtensionOption" nillable="true" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_OptionalPurchaseOfInterestAmount" name="OptionalPurchaseOfInterestAmount" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" />
  <element id="cli_UnconsolidatedJointVenturesMember" name="UnconsolidatedJointVenturesMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_MortgageLoanOnRealEstatePreviousMaturityDate" name="MortgageLoanOnRealEstatePreviousMaturityDate" nillable="true" type="xbrli:dateItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_FourPointFiveZeroZeroPercentSeniorUnsecuredNotesDueAprilEighteenTwoThousandTwentyTwoMember" name="FourPointFiveZeroZeroPercentSeniorUnsecuredNotesDueAprilEighteenTwoThousandTwentyTwoMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_MaximumPeriodAfterCessationOfMajorConstructionActivityThatProjectsAreConsideredComplete" name="MaximumPeriodAfterCessationOfMajorConstructionActivityThatProjectsAreConsideredComplete" nillable="true" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_DepositaryShareEquivalentOfPreferredShare" name="DepositaryShareEquivalentOfPreferredShare" nillable="true" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" />
  <element id="cli_AllowanceForDoubtfulAccountsPolicyPolicyTextBlock" name="AllowanceForDoubtfulAccountsPolicyPolicyTextBlock" nillable="true" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_MultipleFamilyPropertiesMember" name="MultipleFamilyPropertiesMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_CondominiumResidentialPropertiesMember" name="CondominiumResidentialPropertiesMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_InProcessDevelopmentProjectsMember" name="InProcessDevelopmentProjectsMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_GaragesMember" name="GaragesMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_NumberOfParkingSpaces" name="NumberOfParkingSpaces" nillable="true" type="xbrli:positiveIntegerItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" />
  <element id="cli_NumberOfCommonSharesReceivedUponRedemptionOfCommonUnits" name="NumberOfCommonSharesReceivedUponRedemptionOfCommonUnits" nillable="true" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_RoselandPartnersLLCMember" name="RoselandPartnersLLCMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_BusinessAcquisitionContingentConsiderationMeasurementPeriod" name="BusinessAcquisitionContingentConsiderationMeasurementPeriod" nillable="true" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_BusinessAcquisitionAcquireeCashDepositedToEscrow" name="BusinessAcquisitionAcquireeCashDepositedToEscrow" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <element id="cli_RecentTransactionsTable" name="RecentTransactionsTable" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" abstract="true" xbrli:periodType="duration" />
  <element id="cli_RecentTransactionsLineItems" name="RecentTransactionsLineItems" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" />
  <element id="cli_WegmansFoodMarketsIncMember" name="WegmansFoodMarketsIncMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_DebtInstrumentVariableRatePeriod" name="DebtInstrumentVariableRatePeriod" nillable="true" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_RatifiedRestrictedStockAwardsMember" name="RatifiedRestrictedStockAwardsMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_TotalStockholderReturnBasedAwardsMember" name="TotalStockholderReturnBasedAwardsMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_ValueOfCommonStockReceivedUponVestingOfAwards" name="ValueOfCommonStockReceivedUponVestingOfAwards" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <element id="cli_DefinedBenefitPlanAnnualEmployerContribution" name="DefinedBenefitPlanAnnualEmployerContribution" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" />
  <element id="cli_MessieurHershMember" name="MessieurHershMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_MessieurLefkowitzMember" name="MessieurLefkowitzMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_MessieurThomasMember" name="MessieurThomasMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_DefinedBenefitPlanPricePerUnitUsedToDetermineAnnualEmployerContribution" name="DefinedBenefitPlanPricePerUnitUsedToDetermineAnnualEmployerContribution" nillable="true" type="num:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_DefinedBenefitPlanPeriodUponWhichStockUnitsBecomePayableFollowingTriggeringEvent" name="DefinedBenefitPlanPeriodUponWhichStockUnitsBecomePayableFollowingTriggeringEvent" nillable="true" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_ThirdQuarterTwoThousandTwelveMember" name="ThirdQuarterTwoThousandTwelveMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_FourthQuarterTwoThousandElevenMember" name="FourthQuarterTwoThousandElevenMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_BusinessAcquisitionContingentConsiderationEarnOutPeriod" name="BusinessAcquisitionContingentConsiderationEarnOutPeriod" nillable="true" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_InterestsOrOptionsInLandParcelsMember" name="InterestsOrOptionsInLandParcelsMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_SavingsRetirementPlanEmployeeMinimumSubscriptionRate" name="SavingsRetirementPlanEmployeeMinimumSubscriptionRate" nillable="true" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_SavingsRetirementPlanEmployeeMaximumSubscriptionRate" name="SavingsRetirementPlanEmployeeMaximumSubscriptionRate" nillable="true" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_SavingsRetirementPlanVestingPeriod" name="SavingsRetirementPlanVestingPeriod" nillable="true" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_SavingsRetirementPlanVestingRights" name="SavingsRetirementPlanVestingRights" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_NinetyFiveChestnutRidgeRoadMember" name="NinetyFiveChestnutRidgeRoadMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_PeriodInAdvanceOfAgreementEndDateThatFairMarketValueEstimatesAreToBeProvided" name="PeriodInAdvanceOfAgreementEndDateThatFairMarketValueEstimatesAreToBeProvided" nillable="true" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
  <element id="cli_NumberOfDeedsTransferred" name="NumberOfDeedsTransferred" nillable="true" type="xbrli:positiveIntegerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" />
</schema>
