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  <xs:element id="ritr_IssuanceCostsIncludedInAdministrativeExpenses" name="IssuanceCostsIncludedInAdministrativeExpenses" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xs:element id="ritr_ChangeInFairValue" name="ChangeInFairValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xs:element id="ritr_FairValueLossOnPromissoryNotesDayOne" name="FairValueLossOnPromissoryNotesDayOne" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xs:element id="ritr_ScheduleOfContractsReceivableNetTextBlock" name="ScheduleOfContractsReceivableNetTextBlock" type="dtr:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="ritr_DeferredOfferingCostsPolicyTextBlock" name="DeferredOfferingCostsPolicyTextBlock" type="dtr:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="ritr_AccountsPayablePolicyTextBlock" name="AccountsPayablePolicyTextBlock" type="dtr:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="ritr_AccruedExpensesAndOtherPayablePolicyTextBlock" name="AccruedExpensesAndOtherPayablePolicyTextBlock" type="dtr:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="ritr_RelatedPartiesPolicyTextBlock" name="RelatedPartiesPolicyTextBlock" type="dtr:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="ritr_NonControllingInterestsPolicyTextBlock" name="NonControllingInterestsPolicyTextBlock" type="dtr:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="ritr_ScheduleOfBusinessAcquisitionsByCashInflowAndOutflowTableTextBlock" name="ScheduleOfBusinessAcquisitionsByCashInflowAndOutflowTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="ritr_CriticalAccountingEstimatesPolicyTextBlock" name="CriticalAccountingEstimatesPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="ritr_PromissoryNotesWithConvertibleOptionsPolicyTextBlock" name="PromissoryNotesWithConvertibleOptionsPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="ritr_ConvenienceTranslationPolicyTextBlock" name="ConvenienceTranslationPolicyTextBlock" type="dtr:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="ritr_ContractsReceivableNetPolicyTextBlock" name="ContractsReceivableNetPolicyTextBlock" type="dtr:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="ritr_ContractAssetsNetAndContractLiabilitiesPolicyTextBlock" name="ContractAssetsNetAndContractLiabilitiesPolicyTextBlock" type="dtr:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="ritr_RetentionReceivablesNetPolicyTextBlock" name="RetentionReceivablesNetPolicyTextBlock" type="dtr:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
</xs:schema>
