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  <xsd:element name="StateStreetTargetReturn2030IvMember" id="spg_StateStreetTargetReturn2030IvMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="StateStreetTargetReturn2035IvMember" id="spg_StateStreetTargetReturn2035IvMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="StateStreetTargetReturn2040IvMember" id="spg_StateStreetTargetReturn2040IvMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="StateStreetTargetReturn2045IvMember" id="spg_StateStreetTargetReturn2045IvMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="StateStreetTargetReturn2050IvMember" id="spg_StateStreetTargetReturn2050IvMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="StateStreetTargetReturn2055IvMember" id="spg_StateStreetTargetReturn2055IvMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="StateStreetTargetReturn2060IvMember" id="spg_StateStreetTargetReturn2060IvMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="StateStreetTargetReturn2065IvMember" id="spg_StateStreetTargetReturn2065IvMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="EmployeeBenefitPlanDiscretionaryProfitSharingContributionsVestingScheduleTableTextBlock" id="spg_EmployeeBenefitPlanDiscretionaryProfitSharingContributionsVestingScheduleTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="EmployerBenefitPlanMaximumVestedBalanceForSingleLumpSumPayment" id="spg_EmployerBenefitPlanMaximumVestedBalanceForSingleLumpSumPayment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="StateStreetUsIndexXMember" id="spg_StateStreetUsIndexXMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="StateStreetSP500IndexXMember" id="spg_StateStreetSP500IndexXMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="StateStreetUsBondIndexXMember" id="spg_StateStreetUsBondIndexXMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="StateStreetTargetReturn2070IvMember" id="spg_StateStreetTargetReturn2070IvMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
</xsd:schema>
