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  <xs:element id="open_OptionIndexedToIssuersEquityCapPrice" abstract="false" name="OptionIndexedToIssuersEquityCapPrice" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="open_LongTermDebtGrossCurrent" abstract="false" name="LongTermDebtGrossCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="open_InventoryRealEstateValuationAdjustmentDecreaseIncrease" abstract="false" name="InventoryRealEstateValuationAdjustmentDecreaseIncrease" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="open_MultipleSeniorRevolvingCreditFacilitiesMember" abstract="true" name="MultipleSeniorRevolvingCreditFacilitiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="open_NetFairValueAdjustmentsAndGainLossOnSaleOfMortgageLoansHeldForSale" abstract="false" name="NetFairValueAdjustmentsAndGainLossOnSaleOfMortgageLoansHeldForSale" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="open_TermDebtFacility2021S3Member" abstract="true" name="TermDebtFacility2021S3Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="open_ShareBasedCompensationArrangementByShareBasedPaymentAwardEstimatedUnrecognizedCompensationExpense" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEstimatedUnrecognizedCompensationExpense" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="open_TermDebtFacility2022M1Member" abstract="true" name="TermDebtFacility2022M1Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="open_RevolvingFacility20191Member" abstract="true" name="RevolvingFacility20191Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="open_RevolvingFacility20183Member" abstract="true" name="RevolvingFacility20183Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="open_RevolvingFacility20221Member" abstract="true" name="RevolvingFacility20221Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="open_MarketableSecuritiesAndEquitySecuritiesWithoutReadilyDeterminableFairValueTableTextBlock" abstract="false" name="MarketableSecuritiesAndEquitySecuritiesWithoutReadilyDeterminableFairValueTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="open_LongTermDebtGrossNoncurrent" abstract="false" name="LongTermDebtGrossNoncurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
</xs:schema>
