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  <xsd:element name="PercentageOfContributionsByEmployee" id="adxn_PercentageOfContributionsByEmployee" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="PercentageOfContributionsByEmployer" id="adxn_PercentageOfContributionsByEmployer" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ActuarialAssumptionOfInterestRatesOnRetirementSavingsCapitalMember" id="adxn_ActuarialAssumptionOfInterestRatesOnRetirementSavingsCapitalMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="IncreaseDecreaseInDefinedBenefitObligationDueToReasonablyPossibleIncreaseInActuarialAssumptionPercentage" id="adxn_IncreaseDecreaseInDefinedBenefitObligationDueToReasonablyPossibleIncreaseInActuarialAssumptionPercentage" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="IncreaseDecreaseInDefinedBenefitObligationDueToReasonablyPossibleDecreaseInActuarialAssumptionPercentage" id="adxn_IncreaseDecreaseInDefinedBenefitObligationDueToReasonablyPossibleDecreaseInActuarialAssumptionPercentage" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="PeriodOfReasonablyPossibleIncreaseInActuarialAssumption" id="adxn_PeriodOfReasonablyPossibleIncreaseInActuarialAssumption" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ActuarialGainsLossesNetDefinedBenefitLiabilityAsset" id="adxn_ActuarialGainsLossesNetDefinedBenefitLiabilityAsset" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="EstimatedDefinedBenefitPayments" id="adxn_EstimatedDefinedBenefitPayments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element name="LaterThanEightYearsAndNotLaterThanNineYearsMember" id="adxn_LaterThanEightYearsAndNotLaterThanNineYearsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="SubscriptionAndFloorPriceAxis" id="adxn_SubscriptionAndFloorPriceAxis" type="xbrli:stringItemType" substitutionGroup="xbrldt:dimensionItem" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="SubscriptionAndFloorPriceMember" id="adxn_SubscriptionAndFloorPriceMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="VestingPeriodOfOptionsGranted" id="adxn_VestingPeriodOfOptionsGranted" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ExercisePeriodOfOptionsGranted" id="adxn_ExercisePeriodOfOptionsGranted" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="InterestReceivedClassifiedAsFinancingActivities" id="adxn_InterestReceivedClassifiedAsFinancingActivities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="DisclosureOfRightOfUseAssetsTextBlock" id="adxn_DisclosureOfRightOfUseAssetsTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="DisclosureOfLeaseLiabilitiesTableTextBlock" id="adxn_DisclosureOfLeaseLiabilitiesTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="DisclosureOfNetDebtTableTextBlock" id="adxn_DisclosureOfNetDebtTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="DisclosureOfShareOptionsGrantedTableTextBlock" id="adxn_DisclosureOfShareOptionsGrantedTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="PercentageOfReasonablyPossibleIncreaseInVolatilityAssumption" id="adxn_PercentageOfReasonablyPossibleIncreaseInVolatilityAssumption" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="PercentageOfReasonablyPossibleDecreaseInVolatilityAssumption" id="adxn_PercentageOfReasonablyPossibleDecreaseInVolatilityAssumption" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="RiskFreeInterestRateAssumptionHighAmount" id="adxn_RiskFreeInterestRateAssumptionHighAmount" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="RiskFreeInterestRateAssumptionLowAmount" id="adxn_RiskFreeInterestRateAssumptionLowAmount" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="EurostarsInnosuisseMember" id="adxn_EurostarsInnosuisseMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="NumberOfSwissBanksUsed" id="adxn_NumberOfSwissBanksUsed" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="DisclosureOfOtherCurrentAssetsTable" id="adxn_DisclosureOfOtherCurrentAssetsTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="DisclosureOfOtherCurrentAssetsLineItems" id="adxn_DisclosureOfOtherCurrentAssetsLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="LeaseLiabilitiesTable" id="adxn_LeaseLiabilitiesTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="LeaseLiabilitiesLineItems" id="adxn_LeaseLiabilitiesLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="NetDebtTable" id="adxn_NetDebtTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="NetDebtLineItems" id="adxn_NetDebtLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="NumberOfTreasurySharesSoldPurchased" id="adxn_NumberOfTreasurySharesSoldPurchased" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="NumberOfDistinctMaterialPromisesAndPerformanceObligations" id="adxn_NumberOfDistinctMaterialPromisesAndPerformanceObligations" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="AdditionalFundingForResearchAndDevelopmentCostsIncurred" id="adxn_AdditionalFundingForResearchAndDevelopmentCostsIncurred" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="ProceedsFromGrants" id="adxn_ProceedsFromGrants" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="LaterThanSevenYearsAndNotLaterThanEightYearsMember" id="adxn_LaterThanSevenYearsAndNotLaterThanEightYearsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="CashAndCashEquivalentMember" id="adxn_CashAndCashEquivalentMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="IncreaseDecreaseThroughCashFlowsNetDebt" id="adxn_IncreaseDecreaseThroughCashFlowsNetDebt" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="IncreaseDecreaseThroughEffectOfChangesInForeignExchangeRatesNetDebt" id="adxn_IncreaseDecreaseThroughEffectOfChangesInForeignExchangeRatesNetDebt" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="PeriodOfReasonablyPossibleDecreaseInActuarialAssumption" id="adxn_PeriodOfReasonablyPossibleDecreaseInActuarialAssumption" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="IncreaseDecreaseThroughModificationOfLeaseTermsToRightOfUseAssets" id="adxn_IncreaseDecreaseThroughModificationOfLeaseTermsToRightOfUseAssets" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="IncreaseDecreaseThroughModificationOfLeaseTermsNetDebt" id="adxn_IncreaseDecreaseThroughModificationOfLeaseTermsNetDebt" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="TaxEffectFromFinancialIncomeFromSaleOfTreasurySharesBySubsidiary" id="adxn_TaxEffectFromFinancialIncomeFromSaleOfTreasurySharesBySubsidiary" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="AllAssetsPercentageContributedToFairValueOfPlanAssets" id="adxn_AllAssetsPercentageContributedToFairValueOfPlanAssets" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="IncreaseDecreaseThroughIssuanceOfWarrantsAndPreFundedWarrants" id="adxn_IncreaseDecreaseThroughIssuanceOfWarrantsAndPreFundedWarrants" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="IncreaseDecreaseInOperatingExpenses" id="adxn_IncreaseDecreaseInOperatingExpenses" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="IncreaseDecreaseInExternalResearchAndDevelopmentCosts" id="adxn_IncreaseDecreaseInExternalResearchAndDevelopmentCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="IncreaseDecreaseThroughSaleOfPreFundedWarrantsEquity" id="adxn_IncreaseDecreaseThroughSaleOfPreFundedWarrantsEquity" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="CostOfSaleOfPreFundedWarrantsEquity" id="adxn_CostOfSaleOfPreFundedWarrantsEquity" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="DisclosureOfFinanceIncomeExpenseTableTextBlock" id="adxn_DisclosureOfFinanceIncomeExpenseTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ShareSalePrice" id="adxn_ShareSalePrice" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="NumberOfWarrantsIssued" id="adxn_NumberOfWarrantsIssued" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ExercisePriceOfIssuedWarrants" id="adxn_ExercisePriceOfIssuedWarrants" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ValueOfIssuedWarrants" id="adxn_ValueOfIssuedWarrants" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element name="ResearchFundingReceived" id="adxn_ResearchFundingReceived" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="AmountOfGrantAwarded" id="adxn_AmountOfGrantAwarded" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="DateOfGrantAxis" id="adxn_DateOfGrantAxis" type="xbrli:stringItemType" substitutionGroup="xbrldt:dimensionItem" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="DateOfGrantMember" id="adxn_DateOfGrantMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="Year2018Member" id="adxn_Year2018Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="Year2021Member" id="adxn_Year2021Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="OtherCreditGradesMember" id="adxn_OtherCreditGradesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="CostOfSalesAgencyAgreementTransactionsEquity" id="adxn_CostOfSalesAgencyAgreementTransactionsEquity" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="CostsPaidOnIssueOfTreasuryShares" id="adxn_CostsPaidOnIssueOfTreasuryShares" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="EmployeeShareOptionPlansMember" id="adxn_EmployeeShareOptionPlansMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="DeferredStrikePricePaymentPlanMember" id="adxn_DeferredStrikePricePaymentPlanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ContractAssetsAndTradeAndOtherReceivablesMember" id="adxn_ContractAssetsAndTradeAndOtherReceivablesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="IncreaseDecreaseInOtherCurrentAsset" id="adxn_IncreaseDecreaseInOtherCurrentAsset" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="IncreaseDecreaseInPayablesAndAccruals" id="adxn_IncreaseDecreaseInPayablesAndAccruals" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="Year2022Member" id="adxn_Year2022Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="IssueOfSharesTreasuryShares" id="adxn_IssueOfSharesTreasuryShares" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="ExerciseOfPreFundedWarrants" id="adxn_ExerciseOfPreFundedWarrants" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="NumberOfSharesReclassedAsTreasurySharesUnderIfrs2TreasuryShares" id="adxn_NumberOfSharesReclassedAsTreasurySharesUnderIfrs2TreasuryShares" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="NumberOfSharesReclassedAsTreasurySharesUnderIfrs2SharesOutstanding" id="adxn_NumberOfSharesReclassedAsTreasurySharesUnderIfrs2SharesOutstanding" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="NumberOfSharesIssuedIncludingIfrs2Shares" id="adxn_NumberOfSharesIssuedIncludingIfrs2Shares" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="NumberOfTreasurySharesIncludingIfrs2Shares" id="adxn_NumberOfTreasurySharesIncludingIfrs2Shares" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="NumberOfSharesOutstandingIncludingIfrs2Shares" id="adxn_NumberOfSharesOutstandingIncludingIfrs2Shares" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="StrikePriceOfEquityIncentiveUnits" id="adxn_StrikePriceOfEquityIncentiveUnits" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="PaymentDeferralPeriodForEquityIncentiveUnitsExercised" id="adxn_PaymentDeferralPeriodForEquityIncentiveUnitsExercised" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="NumberOfOptionsRepriced" id="adxn_NumberOfOptionsRepriced" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="ShareOptionExercisePriceChf0.13Member" id="adxn_ShareOptionExercisePriceChf0.13Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ShareOptionExercisePriceChf0.14ToChf0.99Member" id="adxn_ShareOptionExercisePriceChf0.14ToChf0.99Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="TypesOfEquityIncentiveUnitsByTimingAxis" id="adxn_TypesOfEquityIncentiveUnitsByTimingAxis" type="xbrli:stringItemType" substitutionGroup="xbrldt:dimensionItem" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="TypesOfEquityIncentiveUnitsByTimingDomain" id="adxn_TypesOfEquityIncentiveUnitsByTimingDomain" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="P2OrA2Member" id="adxn_P2OrA2Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ResearchFundingPaidByInvestorToThirdParties" id="adxn_ResearchFundingPaidByInvestorToThirdParties" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="SharesNotSubjectToSalesRestrictions" id="adxn_SharesNotSubjectToSalesRestrictions" type="xbrli:decimalItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="ExpirationPeriodForOptions" id="adxn_ExpirationPeriodForOptions" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="IncreaseDecreaseInUnrecordedTaxLossesCarryForwards" id="adxn_IncreaseDecreaseInUnrecordedTaxLossesCarryForwards" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="AcquisitionOfSharesForfeitedFromDeferredStrikePricePaymentPlan" id="adxn_AcquisitionOfSharesForfeitedFromDeferredStrikePricePaymentPlan" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="KeyManagementPersonnelCompensationSalariesOtherShortTermEmployeeBenefitsAndPostEmploymentBenefits" id="adxn_KeyManagementPersonnelCompensationSalariesOtherShortTermEmployeeBenefitsAndPostEmploymentBenefits" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="ShareCapitalAsRegisteredInTradeRegister" id="adxn_ShareCapitalAsRegisteredInTradeRegister" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="NumberOfSharesRegisteredInTradeRegister" id="adxn_NumberOfSharesRegisteredInTradeRegister" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="IncreaseDecreaseInDirectorsAndOfficersInsuranceLiability" id="adxn_IncreaseDecreaseInDirectorsAndOfficersInsuranceLiability" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="Year2023Member" id="adxn_Year2023Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="January12023Member" id="adxn_January12023Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="May122023Member" id="adxn_May122023Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="July12023Member" id="adxn_July12023Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ShareOptionExercisePriceChf0.043To0.106Member" id="adxn_ShareOptionExercisePriceChf0.043To0.106Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ShareOptionExercisePriceChf1.00To3.00Member" id="adxn_ShareOptionExercisePriceChf1.00To3.00Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ShareOptionExercisePriceChf0.043Member" id="adxn_ShareOptionExercisePriceChf0.043Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="Mglu2NamProgramMember" id="adxn_Mglu2NamProgramMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="LaterThanNineYearsAndNotLaterThanTenYearsMember" id="adxn_LaterThanNineYearsAndNotLaterThanTenYearsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ContractFundingForResearchAndDevelopmentCostsIncurred" id="adxn_ContractFundingForResearchAndDevelopmentCostsIncurred" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="Years2021To2023Member" id="adxn_Years2021To2023Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="CostOfPreFundedWarrantsExercisedEquity" id="adxn_CostOfPreFundedWarrantsExercisedEquity" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="NeurosterixPharmaSarlMember" id="adxn_NeurosterixPharmaSarlMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="OtherComprehensiveIncomeNetOfTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlansContinuingOperations" id="adxn_OtherComprehensiveIncomeNetOfTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlansContinuingOperations" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="OtherComprehensiveIncomeNetOfTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlansDiscontinuedOperations" id="adxn_OtherComprehensiveIncomeNetOfTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlansDiscontinuedOperations" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="AdjustmentsForGainLossOnDiscontinuanceNetOfTax" id="adxn_AdjustmentsForGainLossOnDiscontinuanceNetOfTax" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="AdjustmentsForGainLossRelatedToLeaseModification" id="adxn_AdjustmentsForGainLossRelatedToLeaseModification" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="PaymentsForLegalFeesForDisposalOfNoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleAndDiscontinuedOperations" id="adxn_PaymentsForLegalFeesForDisposalOfNoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleAndDiscontinuedOperations" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="PaymentsForCostsOnSaleAndExercisePreFundedWarrants" id="adxn_PaymentsForCostsOnSaleAndExercisePreFundedWarrants" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="GainLossOnDiscontinuanceNetOfTax" id="adxn_GainLossOnDiscontinuanceNetOfTax" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="GainLossOnDiscontinuanceNetOfTaxNonCashItems" id="adxn_GainLossOnDiscontinuanceNetOfTaxNonCashItems" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="NeurosterixUsHoldingsLlcMember" id="adxn_NeurosterixUsHoldingsLlcMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="IncreaseDecreaseThroughDisposalsNetDebt" id="adxn_IncreaseDecreaseThroughDisposalsNetDebt" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="IncreaseDecreaseThroughAssetsTransferredNetDebt" id="adxn_IncreaseDecreaseThroughAssetsTransferredNetDebt" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="MiscellaneousOtherCurrentAssets" id="adxn_MiscellaneousOtherCurrentAssets" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="ServiceAgreementMember" id="adxn_ServiceAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="IncreaseDecreaseInDepreciationOfIntangibleAssets" id="adxn_IncreaseDecreaseInDepreciationOfIntangibleAssets" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="TaxEffectOfProfitsLossOfSubsidiaryOnLossOfControl" id="adxn_TaxEffectOfProfitsLossOfSubsidiaryOnLossOfControl" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="TaxEffectOfPermanentDifferencesRelatedToInvestmentsAccountedUsingEquityMethod" id="adxn_TaxEffectOfPermanentDifferencesRelatedToInvestmentsAccountedUsingEquityMethod" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="AllostericModulatorDrugDiscoveryTechnologyPlatformAndPortfolioOfPreclinicalProgramsDisposalGroupDiscontinuedOperationsMember" id="adxn_AllostericModulatorDrugDiscoveryTechnologyPlatformAndPortfolioOfPreclinicalProgramsDisposalGroupDiscontinuedOperationsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="AmountOfCommitmentFundingReceived" id="adxn_AmountOfCommitmentFundingReceived" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="ProfitLossFromOrdinaryActivitiesOfDiscontinuedOperationsNetOfTax" id="adxn_ProfitLossFromOrdinaryActivitiesOfDiscontinuedOperationsNetOfTax" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="NetGainOnDivestmentCompanyDerecognition" id="adxn_NetGainOnDivestmentCompanyDerecognition" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="DisposalOfNoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleAndDiscontinuedOperationsConsideration" id="adxn_DisposalOfNoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleAndDiscontinuedOperationsConsideration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="InvestmentInDivestmentCompany" id="adxn_InvestmentInDivestmentCompany" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="DisposalOfNoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleAndDiscontinuedOperationsCosts" id="adxn_DisposalOfNoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleAndDiscontinuedOperationsCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="DefinedBenefitPlanContributionsPaid" id="adxn_DefinedBenefitPlanContributionsPaid" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="AdjustmentsForDecreaseIncreaseInMiscellaneousOtherCurrentAssets" id="adxn_AdjustmentsForDecreaseIncreaseInMiscellaneousOtherCurrentAssets" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="PercentageOfEquityInterestReceived" id="adxn_PercentageOfEquityInterestReceived" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="GrossProceedsFromDisposalOfDiscontinuedOperation" id="adxn_GrossProceedsFromDisposalOfDiscontinuedOperation" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="AmountOfEquityInterestReceivedOnDisposalOfDiscontinuedOperation" id="adxn_AmountOfEquityInterestReceivedOnDisposalOfDiscontinuedOperation" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="RetirementBenefitObligationOfEmployeesLeavingDueToDisposalOfDiscontinuedOperation" id="adxn_RetirementBenefitObligationOfEmployeesLeavingDueToDisposalOfDiscontinuedOperation" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="FairValueOfServiceAgreementProvidedAfterDisposalOfDiscontinuedOperation" id="adxn_FairValueOfServiceAgreementProvidedAfterDisposalOfDiscontinuedOperation" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="NetDebtLiabilitiesRelatedToDivestedCompany" id="adxn_NetDebtLiabilitiesRelatedToDivestedCompany" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="CostOfLegalFeesForDisposalOfDiscontinuedOperations" id="adxn_CostOfLegalFeesForDisposalOfDiscontinuedOperations" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="CostOfAcceleratedVestingOfEquityIncentiveUnitsOfEmployeesTransferred" id="adxn_CostOfAcceleratedVestingOfEquityIncentiveUnitsOfEmployeesTransferred" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="IncreaseInInterestsInAssociates" id="adxn_IncreaseInInterestsInAssociates" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="NeurosterixGroupMember" id="adxn_NeurosterixGroupMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="NumberOfDilutiveInstruments" id="adxn_NumberOfDilutiveInstruments" type="xbrli:decimalItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="NumberOfSharesRegisteredInCommercialRegisterDuringPeriod" id="adxn_NumberOfSharesRegisteredInCommercialRegisterDuringPeriod" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="NumberOfOptionsGrantedToEmployeesAndExecutiveManagersTransferredOnDisposalOfOperations" id="adxn_NumberOfOptionsGrantedToEmployeesAndExecutiveManagersTransferredOnDisposalOfOperations" type="xbrli:decimalItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="SharesRelatedToEmployeesAndExecutiveManagersTransferredOnDisposalOfOperations" id="adxn_SharesRelatedToEmployeesAndExecutiveManagersTransferredOnDisposalOfOperations" type="xbrli:decimalItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="ProfitLossBeforeTaxDiscontinuedOperationsIncludingGainLossOnDiscontinuance" id="adxn_ProfitLossBeforeTaxDiscontinuedOperationsIncludingGainLossOnDiscontinuance" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="IncreaseDecreaseInSurplusOfDefinedBenefitPlan" id="adxn_IncreaseDecreaseInSurplusOfDefinedBenefitPlan" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="ResearchAndDevelopmentExpensesMember" id="adxn_ResearchAndDevelopmentExpensesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="GeneralAndAdministrativeExpensesMember" id="adxn_GeneralAndAdministrativeExpensesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ExpensesRecognisedForServicesReceivedAtZeroCosts" id="adxn_ExpensesRecognisedForServicesReceivedAtZeroCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="IncomeRecognisedForServicesReceivedAtZeroCosts" id="adxn_IncomeRecognisedForServicesReceivedAtZeroCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="TabularDisclosureOfInformationAboutFinancialAssetsAtFairValueThroughOtherComprehensiveIncomeTableTextBlock" id="adxn_TabularDisclosureOfInformationAboutFinancialAssetsAtFairValueThroughOtherComprehensiveIncomeTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="ExercisePeriodOfWarrants" id="adxn_ExercisePeriodOfWarrants" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="CostOfSaleOfTreasurySharesEquity" id="adxn_CostOfSaleOfTreasurySharesEquity" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="AdjustmentsForCostOfFairValueOfServicesReceivedAtZeroCost" id="adxn_AdjustmentsForCostOfFairValueOfServicesReceivedAtZeroCost" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="AdjustmentsForIncomeOfFairValueOfServicesReceivedAtZeroCost" id="adxn_AdjustmentsForIncomeOfFairValueOfServicesReceivedAtZeroCost" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="CostsPaidOnSaleOfTreasuryShares" id="adxn_CostsPaidOnSaleOfTreasuryShares" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="SaleOfTreasuryShares" id="adxn_SaleOfTreasuryShares" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="TypeOfTreasuryShareTransactionAxis" id="adxn_TypeOfTreasuryShareTransactionAxis" type="xbrli:stringItemType" substitutionGroup="xbrldt:dimensionItem" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="TypeOfTreasuryShareTransactionDomain" id="adxn_TypeOfTreasuryShareTransactionDomain" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="TreasurySharesSoldOtherThanUnderSaleAgencyAgreementMember" id="adxn_TreasurySharesSoldOtherThanUnderSaleAgencyAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="TreasurySharesSoldUnderSaleAgencyAgreementMember" id="adxn_TreasurySharesSoldUnderSaleAgencyAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="DisposalOfNoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleAndDiscontinuedOperationsOtherConsideration" id="adxn_DisposalOfNoncurrentAssetsOrDisposalGroupsClassifiedAsHeldForSaleAndDiscontinuedOperationsOtherConsideration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="PreferredSharesReceivedOnInvestment" id="adxn_PreferredSharesReceivedOnInvestment" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="StaliclaSaMember" id="adxn_StaliclaSaMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="PurchaseOfDerivativeFinancialInstruments" id="adxn_PurchaseOfDerivativeFinancialInstruments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="PurchaseOfInvestmentsInOtherEntitiesIncludingRelatedFinancialInstruments" id="adxn_PurchaseOfInvestmentsInOtherEntitiesIncludingRelatedFinancialInstruments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="DisclosureOfFairValueMeasurementOfDerivativeFinancialInstrumentsTextBlock" id="adxn_DisclosureOfFairValueMeasurementOfDerivativeFinancialInstrumentsTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="PhantomSharesReceivedOnInvestment" id="adxn_PhantomSharesReceivedOnInvestment" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="WarrantsReceivedOnInvestment" id="adxn_WarrantsReceivedOnInvestment" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="StrikePriceOfWarrantsReceivedOnInvestment" id="adxn_StrikePriceOfWarrantsReceivedOnInvestment" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="WarrantsReceivedOnInvestmentsClassOneMember" id="adxn_WarrantsReceivedOnInvestmentsClassOneMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="WarrantsReceivedOnInvestmentsClassTwoMember" id="adxn_WarrantsReceivedOnInvestmentsClassTwoMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="NumberOfOrdinarySharesToWhoseProceedsPhantomSharesEntitlephantomSharesReceivedOnInvestment" id="adxn_NumberOfOrdinarySharesToWhoseProceedsPhantomSharesEntitlephantomSharesReceivedOnInvestment" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="NumberOfOrdinarySharesToWhosePurchaseWarrantsEntitle" id="adxn_NumberOfOrdinarySharesToWhosePurchaseWarrantsEntitle" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="NumberOfPreferredSharesToWhosePurchaseWarrantsEntitle" id="adxn_NumberOfPreferredSharesToWhosePurchaseWarrantsEntitle" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="AmountNotRecordedAsPhantomSharesDueToCapOnFairValue" id="adxn_AmountNotRecordedAsPhantomSharesDueToCapOnFairValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="PhantomSharesMember" id="adxn_PhantomSharesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="AntiDilutionProtectionMember" id="adxn_AntiDilutionProtectionMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="UnderlyingSharePriceMember" id="adxn_UnderlyingSharePriceMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="SalePriceOfSharesMember" id="adxn_SalePriceOfSharesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ShareOfNetAssetsOfAssociates" id="adxn_ShareOfNetAssetsOfAssociates" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="DifferenceBetweenCarryingAmountOfEquityAccountedInvestmentAndShareOfNetAssets" id="adxn_DifferenceBetweenCarryingAmountOfEquityAccountedInvestmentAndShareOfNetAssets" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="IssueOfTreasuryShares" id="adxn_IssueOfTreasuryShares" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="SaleOfTreasuryShare" id="adxn_SaleOfTreasuryShare" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="GrossProceedsFromSaleOfTreasurySharesExcludingLiquidityAgreement" id="adxn_GrossProceedsFromSaleOfTreasurySharesExcludingLiquidityAgreement" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="MaintenanceOfPatentsMember" id="adxn_MaintenanceOfPatentsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="FairValueOfServiceAgreementIncludedInCalculationOfGainOrLossOnTransaction" id="adxn_FairValueOfServiceAgreementIncludedInCalculationOfGainOrLossOnTransaction" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="AdsSalePrice" id="adxn_AdsSalePrice" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
</xsd:schema>
