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    <element id="OZSC_ConvertibleInstrumentsPolicyTextBlock" name="ConvertibleInstrumentsPolicyTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="OZSC_DistinguishingLiabilitiesfromEquityPolicyTextBlock" name="DistinguishingLiabilitiesfromEquityPolicyTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
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    <element id="OZSC_ScheduleOfCommonStockExercisableOrIssuableFromOutstandingStockWarrantsTableTextBlock" name="ScheduleOfCommonStockExercisableOrIssuableFromOutstandingStockWarrantsTableTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
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    <element id="OZSC_ScheduleOfOperatingLeaseLiabilitiesTableTextBlock" name="ScheduleOfOperatingLeaseLiabilitiesTableTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
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    <element id="OZSC_ScheduleOfChangesOfEquityToTheImpactOReverseStockSplitAbstract" name="ScheduleOfChangesOfEquityToTheImpactOReverseStockSplitAbstract" abstract="true" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" />
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    <element id="OZSC_ScheduleOfChangesOfEquityToTheImpactOReverseStockSplitLineItems" name="ScheduleOfChangesOfEquityToTheImpactOReverseStockSplitLineItems" abstract="true" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" />
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    <element id="OZSC_CommonStockToBeIssuedAmount" name="CommonStockToBeIssuedAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="OZSC_ScheduleOfChangeInLossPerShareAndWeightedAverageSharesAbstract" name="ScheduleOfChangeInLossPerShareAndWeightedAverageSharesAbstract" abstract="true" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" />
    <element id="OZSC_ScheduleOfChangeInLossPerShareAndWeightedAverageSharesTable" name="ScheduleOfChangeInLossPerShareAndWeightedAverageSharesTable" abstract="true" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" />
    <element id="OZSC_ScheduleOfChangeInLossPerShareAndWeightedAverageSharesLineItems" name="ScheduleOfChangeInLossPerShareAndWeightedAverageSharesLineItems" abstract="true" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" />
    <element id="OZSC_LossAttributableToCommonShareholders" name="LossAttributableToCommonShareholders" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
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    <element id="OZSC_ScheduleOfCommonStockExercisableOrIssuableFromOutstandingStockWarrantsTable" name="ScheduleOfCommonStockExercisableOrIssuableFromOutstandingStockWarrantsTable" abstract="true" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" />
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    <element id="OZSC_ConvertibleNotesPayableShares" name="ConvertibleNotesPayableShares" nillable="true" xbrli:periodType="instant" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="OZSC_PromissoryNotesPayableShares" name="PromissoryNotesPayableShares" nillable="true" xbrli:periodType="instant" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="OZSC_WorkingCapitalDeficit" name="WorkingCapitalDeficit" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="OZSC_EquityFinancingAgreementDescription" name="EquityFinancingAgreementDescription" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" />
    <element id="OZSC_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareReverseStockSplits" name="AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareReverseStockSplits" nillable="true" xbrli:periodType="duration" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="OZSC_ConvertibleNotesPayableAndDerivativeLiabilitiesAbstract" name="ConvertibleNotesPayableAndDerivativeLiabilitiesAbstract" abstract="true" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" />
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    <element id="OZSC_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueDerivativeLiabilityCreditedExpense" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueDerivativeLiabilityCreditedExpense" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
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    <element id="OZSC_ConvertibleNoteInExchangeForPromissoryNoteAndAccruedInterest" name="ConvertibleNoteInExchangeForPromissoryNoteAndAccruedInterest" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
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    <element id="OZSC_DerivativeLiabilityIssuedDuringPeriod" name="DerivativeLiabilityIssuedDuringPeriod" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="OZSC_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInEarning" name="FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInEarning" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="OZSC_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationReclassifiedToEquity" name="FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationReclassifiedToEquity" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
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    <element id="OZSC_OperatingLeaseExpenseAfterNettingOffSubleaseIncome" name="OperatingLeaseExpenseAfterNettingOffSubleaseIncome" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="OZSC_OperatingLeaseRightOfUseAssetBeforeAccumulatedAmortization" name="OperatingLeaseRightOfUseAssetBeforeAccumulatedAmortization" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
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    <element id="OZSC_PennsylvaniaCorporationMember" name="PennsylvaniaCorporationMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="OZSC_CommonAndPreferredStockSharesAuthorized" name="CommonAndPreferredStockSharesAuthorized" nillable="true" xbrli:periodType="instant" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
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</schema>
