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  <xs:element name="BusinessAcquisitionPercentageOfCommonAndPreferredStockRetained" type="dtr:percentItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="blbx_BusinessAcquisitionPercentageOfCommonAndPreferredStockRetained"/>
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  <xs:element name="ConversionOfStocksPercentageOfTotalCommonStockOutstanding" type="dtr:percentItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="blbx_ConversionOfStocksPercentageOfTotalCommonStockOutstanding"/>
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  <xs:element name="LoanAndLeasesReceivableTerm" type="xbrli:durationItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="blbx_LoanAndLeasesReceivableTerm"/>
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  <xs:element name="PreferredStockNumberOfVotesPerShare" type="xbrli:integerItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="blbx_PreferredStockNumberOfVotesPerShare"/>
  <xs:element name="MarketCapitalizationConversionThresholdValue" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="blbx_MarketCapitalizationConversionThresholdValue"/>
  <xs:element name="ConversionOfPreferredStockMaximumConversionAllowedPercentageOfOutstandingCommonStock" type="dtr:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="blbx_ConversionOfPreferredStockMaximumConversionAllowedPercentageOfOutstandingCommonStock"/>
  <xs:element name="StockIssuedDuringPeriodSharesIssuedForFinancingCosts" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="blbx_StockIssuedDuringPeriodSharesIssuedForFinancingCosts"/>
  <xs:element name="StockIssuedDuringPeriodValueIssuedForFinancingCosts" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="blbx_StockIssuedDuringPeriodValueIssuedForFinancingCosts"/>
  <xs:element name="WarrantsAndRightsOutstandingMeasurementInputTerm" type="xbrli:durationItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="blbx_WarrantsAndRightsOutstandingMeasurementInputTerm"/>
  <xs:element name="StockAndWarrantsIssuedDuringPeriodValue" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="blbx_StockAndWarrantsIssuedDuringPeriodValue"/>
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  <xs:element name="RelatedPartyTransactionsDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="blbx_RelatedPartyTransactionsDetailsTable"/>
  <xs:element name="RelatedPartyTransactionsDetailsLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="blbx_RelatedPartyTransactionsDetailsLineItems"/>
  <xs:element name="CashAdvances" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="blbx_CashAdvances"/>
  <xs:element name="RepaymentOfCashAdvance" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="blbx_RepaymentOfCashAdvance"/>
  <xs:element name="CashAdvancesOutstanding" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="blbx_CashAdvancesOutstanding"/>
  <xs:element name="DebtDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="blbx_DebtDetailsTable"/>
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  <xs:element name="ShortTermBorrowingsFutureReceivablesPurchasesTotal" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="blbx_ShortTermBorrowingsFutureReceivablesPurchasesTotal"/>
  <xs:element name="ShorttermDebtWeeklyPaymentAmount" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="blbx_ShorttermDebtWeeklyPaymentAmount"/>
  <xs:element name="ShorttermDebtOutstandingAmount" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item" id="blbx_ShorttermDebtOutstandingAmount"/>
  <xs:element name="DebtInstrumentConversionMultiplier" type="xbrli:decimalItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="blbx_DebtInstrumentConversionMultiplier"/>
  <xs:element name="CommitmentsandContingenciesDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="blbx_CommitmentsandContingenciesDetailsTable"/>
  <xs:element name="CommitmentsandContingenciesDetailsLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="blbx_CommitmentsandContingenciesDetailsLineItems"/>
  <xs:element name="EmployeeRetentionCredit" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item" id="blbx_EmployeeRetentionCredit"/>
  <xs:element name="SubsequentEventsDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="blbx_SubsequentEventsDetailsTable"/>
  <xs:element name="SubsequentEventsDetailsLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="blbx_SubsequentEventsDetailsLineItems"/>
  <xs:element name="DebtInstrumentStatedValuePerShare" type="dtr:perShareItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item" id="blbx_DebtInstrumentStatedValuePerShare"/>
  <xs:element name="InvestmentsDetailsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="blbx_InvestmentsDetailsTable"/>
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  <xs:element name="ConversionOfEvtecGroupPreferredSharesIntoOrdinarySharesMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="blbx_ConversionOfEvtecGroupPreferredSharesIntoOrdinarySharesMember"/>
  <xs:element name="ConversionOfPreferredStockPursuantToSecuritiesExchangeAgreementIntoOrdinaryShareMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="blbx_ConversionOfPreferredStockPursuantToSecuritiesExchangeAgreementIntoOrdinaryShareMember"/>
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  <xs:element name="FiveNarrowLaneLPFNLMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="blbx_FiveNarrowLaneLPFNLMember"/>
  <xs:element name="MerchantCashAdvanceAgreementMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="blbx_MerchantCashAdvanceAgreementMember"/>
  <xs:element name="OfficeSpace5430LBJFreewayDallasTexasMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="blbx_OfficeSpace5430LBJFreewayDallasTexasMember"/>
  <xs:element name="OneForFiveShareBasisMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="blbx_OneForFiveShareBasisMember"/>
  <xs:element name="OneForOnePointSevenFiveShareBasisMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="blbx_OneForOnePointSevenFiveShareBasisMember"/>
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  <xs:element name="OneForThreePointThreeShareBasisMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="blbx_OneForThreePointThreeShareBasisMember"/>
  <xs:element name="OneForTwoPointFiveShareBasisMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="blbx_OneForTwoPointFiveShareBasisMember"/>
  <xs:element name="PaycheckProtectionProgramCARESActMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="blbx_PaycheckProtectionProgramCARESActMember"/>
  <xs:element name="PreferredStockIssuedInExchangeForPreferredSharesFromOtherCompanyMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="blbx_PreferredStockIssuedInExchangeForPreferredSharesFromOtherCompanyMember"/>
  <xs:element name="QuadrofoglioHoldingsLLCMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="blbx_QuadrofoglioHoldingsLLCMember"/>
  <xs:element name="RABLBXMergerSubIncAndREalloysMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="blbx_RABLBXMergerSubIncAndREalloysMember"/>
  <xs:element name="REalloysMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="blbx_REalloysMember"/>
  <xs:element name="ReverseStockSplitMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="blbx_ReverseStockSplitMember"/>
  <xs:element name="SeriesAConvertiblePreferredStockMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="blbx_SeriesAConvertiblePreferredStockMember"/>
  <xs:element name="SeriesBConvertiblePreferredStockMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="blbx_SeriesBConvertiblePreferredStockMember"/>
  <xs:element name="SeriesBPreferredStockConvertedIntoCommonStockMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="blbx_SeriesBPreferredStockConvertedIntoCommonStockMember"/>
  <xs:element name="SettlementAgreementMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="blbx_SettlementAgreementMember"/>
  <xs:element name="StockPurchaseAgreementMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="blbx_StockPurchaseAgreementMember"/>
  <xs:element name="StockRepurchasePlanMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="blbx_StockRepurchasePlanMember"/>
  <xs:element name="TerminationAgreementMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="blbx_TerminationAgreementMember"/>
  <xs:element name="The2021IncentiveStockPlanMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="blbx_The2021IncentiveStockPlanMember"/>
  <xs:element name="TotalPreferredStockMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="blbx_TotalPreferredStockMember"/>
  <xs:element name="TreasuryStockCommonAndPreferredMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="blbx_TreasuryStockCommonAndPreferredMember"/>
  <xs:element name="UndesignatedPreferredStockMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="blbx_UndesignatedPreferredStockMember"/>
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