<?xml version="1.0" encoding="utf-8"?>
<?taxonomy-generator id="PomdocPro" version="2021.1.1.1" date="2026-04-28 21:12:39"?>
<linkbase 
  xml:lang="en"
  xmlns="http://www.xbrl.org/2003/linkbase"
  xmlns:xlink="http://www.w3.org/1999/xlink"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd"
>
  <roleRef roleURI="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedLabel"/>
  <roleRef roleURI="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedTotalLabel"/>
  <roleRef roleURI="http://www.xbrl.org/2009/role/netLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/net-2009-12-16.xsd#netLabel"/>
  <roleRef roleURI="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedTerseLabel"/>
  <roleRef roleURI="http://www.xbrl.org/2009/role/negatedPeriodEndLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedPeriodEndLabel"/>
  <roleRef roleURI="http://www.xbrl.org/2009/role/negatedPeriodStartLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedPeriodStartLabel"/>
  <labelLink xlink:role="http://www.xbrl.org/2003/role/link" xlink:type="extended">
  <loc
    xlink:type="locator"
    xlink:href="969500Y7G9TY7Y24GN07-2025-12-31.xsd#ALT_CurrentSocialSecurityAndTaxLiabilitiesOtherThanIncomeTax"
    xlink:label="ALT_CurrentSocialSecurityAndTaxLiabilitiesOtherThanIncomeTax"
  />
  <loc
    xlink:type="locator"
    xlink:href="969500Y7G9TY7Y24GN07-2025-12-31.xsd#ALT_ChangesInCashAndCashEquivalentsAbstract"
    xlink:label="ALT_ChangesInCashAndCashEquivalentsAbstract"
  />
  <loc
    xlink:type="locator"
    xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CashFlowsFromUsedInFinancingActivities"
    xlink:label="ifrs-full_CashFlowsFromUsedInFinancingActivities"
  />
  <loc
    xlink:type="locator"
    xlink:href="969500Y7G9TY7Y24GN07-2025-12-31.xsd#ALT_PrepaymentsAndValueAddedTaxReceivablesCurrent"
    xlink:label="ALT_PrepaymentsAndValueAddedTaxReceivablesCurrent"
  />
  <loc
    xlink:type="locator"
    xlink:href="969500Y7G9TY7Y24GN07-2025-12-31.xsd#ALT_CashReceiptsFromRepaymentOfAdvancesAndLoansMadeToOtherPartiesAndProceedsFromSalesOrMaturityOfFinancialInstrumentsClassifiedAsInvestingActivities"
    xlink:label="ALT_CashReceiptsFromRepaymentOfAdvancesAndLoansMadeToOtherPartiesAndProceedsFromSalesOrMaturityOfFinancialInstrumentsClassifiedAsInvestingActivities"
  />
  <loc
    xlink:type="locator"
    xlink:href="969500Y7G9TY7Y24GN07-2025-12-31.xsd#ALT_IncreaseDecreaseInNumberOfSharesIssued"
    xlink:label="ALT_IncreaseDecreaseInNumberOfSharesIssued"
  />
  <loc
    xlink:type="locator"
    xlink:href="969500Y7G9TY7Y24GN07-2025-12-31.xsd#ALT_ProceedsFromDisposalsOfPropertyPlantAndEquipmentAndIntangibleAssetsOtherThanGoodwill"
    xlink:label="ALT_ProceedsFromDisposalsOfPropertyPlantAndEquipmentAndIntangibleAssetsOtherThanGoodwill"
  />
  <loc
    xlink:type="locator"
    xlink:href="969500Y7G9TY7Y24GN07-2025-12-31.xsd#ALT_NonControllingInterestsReserveOfExchangeDifferencesOnTranslationMember"
    xlink:label="ALT_NonControllingInterestsReserveOfExchangeDifferencesOnTranslationMember"
  />
  <loc
    xlink:type="locator"
    xlink:href="969500Y7G9TY7Y24GN07-2025-12-31.xsd#ALT_MiscellaneousOtherReservesAndRetainedEarningsExcludingProfitLossForReportingPeriodMember"
    xlink:label="ALT_MiscellaneousOtherReservesAndRetainedEarningsExcludingProfitLossForReportingPeriodMember"
  />
  <loc
    xlink:type="locator"
    xlink:href="969500Y7G9TY7Y24GN07-2025-12-31.xsd#ALT_ProfitLossFromOrdinaryOperatingActivitiesBeforeShareBasedPaymentTransactions"
    xlink:label="ALT_ProfitLossFromOrdinaryOperatingActivitiesBeforeShareBasedPaymentTransactions"
  />
  <loc
    xlink:type="locator"
    xlink:href="969500Y7G9TY7Y24GN07-2025-12-31.xsd#ALT_OtherOperatingExpensesFromNonOrdinaryActivities"
    xlink:label="ALT_OtherOperatingExpensesFromNonOrdinaryActivities"
  />
  <loc
    xlink:type="locator"
    xlink:href="969500Y7G9TY7Y24GN07-2025-12-31.xsd#ALT_AdjustmentsForFinancialProvisionsAndIncreaseArisingFromPassageOfTime"
    xlink:label="ALT_AdjustmentsForFinancialProvisionsAndIncreaseArisingFromPassageOfTime"
  />
  <loc
    xlink:type="locator"
    xlink:href="969500Y7G9TY7Y24GN07-2025-12-31.xsd#ALT_PurchaseOfPropertyPlantAndEquipmentAndIntangibleAssetsOtherThanGoodwill"
    xlink:label="ALT_PurchaseOfPropertyPlantAndEquipmentAndIntangibleAssetsOtherThanGoodwill"
  />
  <loc
    xlink:type="locator"
    xlink:href="969500Y7G9TY7Y24GN07-2025-12-31.xsd#ALT_AdjustmentsForProvisionsAndAdjustmentsForDepreciationAndAmortisationExpenseAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss"
    xlink:label="ALT_AdjustmentsForProvisionsAndAdjustmentsForDepreciationAndAmortisationExpenseAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss"
  />
  <loc
    xlink:type="locator"
    xlink:href="969500Y7G9TY7Y24GN07-2025-12-31.xsd#ALT_ProfitLossFromOrdinaryOperatingActivities"
    xlink:label="ALT_ProfitLossFromOrdinaryOperatingActivities"
  />
  <loc
    xlink:type="locator"
    xlink:href="969500Y7G9TY7Y24GN07-2025-12-31.xsd#ALT_TreasurySharesOtherReservesAndRetainedEarningsExcludingProfitLossForReportingPeriod"
    xlink:label="ALT_TreasurySharesOtherReservesAndRetainedEarningsExcludingProfitLossForReportingPeriod"
  />
  <loc
    xlink:type="locator"
    xlink:href="969500Y7G9TY7Y24GN07-2025-12-31.xsd#ALT_ProfitLossFromConsolidatedCompanies"
    xlink:label="ALT_ProfitLossFromConsolidatedCompanies"
  />
  <loc
    xlink:type="locator"
    xlink:href="969500Y7G9TY7Y24GN07-2025-12-31.xsd#ALT_ImpactOfChangesInScopeAndPaymentOfContingentConsiderationClassifiedAsInvestingActivities"
    xlink:label="ALT_ImpactOfChangesInScopeAndPaymentOfContingentConsiderationClassifiedAsInvestingActivities"
  />
  <loc
    xlink:type="locator"
    xlink:href="969500Y7G9TY7Y24GN07-2025-12-31.xsd#ALT_IncreaseDecreaseInNumberOfSharesIssuedThroughTransactionsWithOwners"
    xlink:label="ALT_IncreaseDecreaseInNumberOfSharesIssuedThroughTransactionsWithOwners"
  />
  <loc
    xlink:type="locator"
    xlink:href="969500Y7G9TY7Y24GN07-2025-12-31.xsd#ALT_IncreaseDecreaseInNumberOfSharesOutstandingThroughIssueOfEquity"
    xlink:label="ALT_IncreaseDecreaseInNumberOfSharesOutstandingThroughIssueOfEquity"
  />
  <loc
    xlink:type="locator"
    xlink:href="969500Y7G9TY7Y24GN07-2025-12-31.xsd#ALT_ProceedsFromNonCurrentBorrowingsAndRepaymentsOfNonCurrentBorrowings"
    xlink:label="ALT_ProceedsFromNonCurrentBorrowingsAndRepaymentsOfNonCurrentBorrowings"
  />
  <loc
    xlink:type="locator"
    xlink:href="969500Y7G9TY7Y24GN07-2025-12-31.xsd#ALT_IncreaseDecreaseInNumberOfSharesOutstandingThroughTreasuryShareTransactions"
    xlink:label="ALT_IncreaseDecreaseInNumberOfSharesOutstandingThroughTreasuryShareTransactions"
  />
  <loc
    xlink:type="locator"
    xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_NumberOfSharesIssued"
    xlink:label="ifrs-full_NumberOfSharesIssued"
  />
  <loc
    xlink:type="locator"
    xlink:href="969500Y7G9TY7Y24GN07-2025-12-31.xsd#ALT_OtherOperatingIncomeFromNonOrdinaryActivities"
    xlink:label="ALT_OtherOperatingIncomeFromNonOrdinaryActivities"
  />
  <loc
    xlink:type="locator"
    xlink:href="969500Y7G9TY7Y24GN07-2025-12-31.xsd#ALT_IncreaseDecreaseInNumberOfSharesOutstandingThroughTransactionsWithOwners"
    xlink:label="ALT_IncreaseDecreaseInNumberOfSharesOutstandingThroughTransactionsWithOwners"
  />
  <loc
    xlink:type="locator"
    xlink:href="969500Y7G9TY7Y24GN07-2025-12-31.xsd#ALT_AdjustmentsForCostOfNetDebt"
    xlink:label="ALT_AdjustmentsForCostOfNetDebt"
  />
  <loc
    xlink:type="locator"
    xlink:href="969500Y7G9TY7Y24GN07-2025-12-31.xsd#ALT_ExcludingAmortisationOfAcquisitionRelatedIntangibleAssets"
    xlink:label="ALT_ExcludingAmortisationOfAcquisitionRelatedIntangibleAssets"
  />
  <loc
    xlink:type="locator"
    xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CashFlowsFromUsedInOperatingActivities"
    xlink:label="ifrs-full_CashFlowsFromUsedInOperatingActivities"
  />
  <loc
    xlink:type="locator"
    xlink:href="969500Y7G9TY7Y24GN07-2025-12-31.xsd#ALT_DepreciationAndAmortisationExpenseFromIdentifiableIntangibleAssetsRecognisedAsOfAcquisitionDate"
    xlink:label="ALT_DepreciationAndAmortisationExpenseFromIdentifiableIntangibleAssetsRecognisedAsOfAcquisitionDate"
  />
  <loc
    xlink:type="locator"
    xlink:href="969500Y7G9TY7Y24GN07-2025-12-31.xsd#ALT_PaymentsToAcquireOrRedeemEntitysSharesAndProceedsFromSaleOrIssueOfTreasuryShares"
    xlink:label="ALT_PaymentsToAcquireOrRedeemEntitysSharesAndProceedsFromSaleOrIssueOfTreasuryShares"
  />
  <loc
    xlink:type="locator"
    xlink:href="969500Y7G9TY7Y24GN07-2025-12-31.xsd#ALT_NonStockPurchasesAndSubcontractingBusiness"
    xlink:label="ALT_NonStockPurchasesAndSubcontractingBusiness"
  />
  <loc
    xlink:type="locator"
    xlink:href="969500Y7G9TY7Y24GN07-2025-12-31.xsd#ALT_OtherOperatingIncomeFromOrdinaryActivities"
    xlink:label="ALT_OtherOperatingIncomeFromOrdinaryActivities"
  />
  <loc
    xlink:type="locator"
    xlink:href="969500Y7G9TY7Y24GN07-2025-12-31.xsd#ALT_NonControllingInterestsOtherReservesAndRetainedEarningsExcludingProfitLossForReportingPeriodMember"
    xlink:label="ALT_NonControllingInterestsOtherReservesAndRetainedEarningsExcludingProfitLossForReportingPeriodMember"
  />
  <loc
    xlink:type="locator"
    xlink:href="969500Y7G9TY7Y24GN07-2025-12-31.xsd#ALT_NonControllingInterestsRetainedEarningsProfitLossForReportingPeriodMember"
    xlink:label="ALT_NonControllingInterestsRetainedEarningsProfitLossForReportingPeriodMember"
  />
  <loc
    xlink:type="locator"
    xlink:href="969500Y7G9TY7Y24GN07-2025-12-31.xsd#ALT_CashAdvancesAndLoansMadeToOtherPartiesAndPurchaseOfFinancialInstrumentsClassifiedAsInvestingActivities"
    xlink:label="ALT_CashAdvancesAndLoansMadeToOtherPartiesAndPurchaseOfFinancialInstrumentsClassifiedAsInvestingActivities"
  />
  <loc
    xlink:type="locator"
    xlink:href="969500Y7G9TY7Y24GN07-2025-12-31.xsd#ALT_CostOfNetDebt"
    xlink:label="ALT_CostOfNetDebt"
  />
  <loc
    xlink:type="locator"
    xlink:href="969500Y7G9TY7Y24GN07-2025-12-31.xsd#ALT_InterestPaidReceivedClassifiedAsFinancingActivities"
    xlink:label="ALT_InterestPaidReceivedClassifiedAsFinancingActivities"
  />
  <loc
    xlink:type="locator"
    xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital"
    xlink:label="ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital"
  />
  <loc
    xlink:type="locator"
    xlink:href="969500Y7G9TY7Y24GN07-2025-12-31.xsd#ALT_EmployeeBenefitsExpenseExcludingExpenseFromShareBasedPaymentTransactionsWithEmployees"
    xlink:label="ALT_EmployeeBenefitsExpenseExcludingExpenseFromShareBasedPaymentTransactionsWithEmployees"
  />
  <loc
    xlink:type="locator"
    xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_IncreaseDecreaseThroughTransactionsWithOwners"
    xlink:label="ifrs-full_IncreaseDecreaseThroughTransactionsWithOwners"
  />
  <loc
    xlink:type="locator"
    xlink:href="969500Y7G9TY7Y24GN07-2025-12-31.xsd#ALT_ExternalOperatingExpensesByNature"
    xlink:label="ALT_ExternalOperatingExpensesByNature"
  />
  <loc
    xlink:type="locator"
    xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CashFlowsFromUsedInInvestingActivities"
    xlink:label="ifrs-full_CashFlowsFromUsedInInvestingActivities"
  />
  <loc
    xlink:type="locator"
    xlink:href="969500Y7G9TY7Y24GN07-2025-12-31.xsd#ALT_OtherOperatingExpensesFromOrdinaryActivities"
    xlink:label="ALT_OtherOperatingExpensesFromOrdinaryActivities"
  />
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_CurrentSocialSecurityAndTaxLiabilitiesOtherThanIncomeTax"
    xlink:to="ALT_CurrentSocialSecurityAndTaxLiabilitiesOtherThanIncomeTax_label_en"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_CurrentSocialSecurityAndTaxLiabilitiesOtherThanIncomeTax_label_en"
    xlink:role="http://www.xbrl.org/2003/role/label"
    xml:lang="en"
  >Current social security and tax liabilities other than income tax</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_ChangesInCashAndCashEquivalentsAbstract"
    xlink:to="ALT_ChangesInCashAndCashEquivalentsAbstract_label_en"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_ChangesInCashAndCashEquivalentsAbstract_label_en"
    xlink:role="http://www.xbrl.org/2003/role/label"
    xml:lang="en"
  >Changes In Cash And Cash Equivalents [Abstract]</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ifrs-full_CashFlowsFromUsedInFinancingActivities"
    xlink:to="ifrs-full_CashFlowsFromUsedInFinancingActivities_totalLabel_en"
  />
  <label
    xlink:type="resource"
    xlink:label="ifrs-full_CashFlowsFromUsedInFinancingActivities_totalLabel_en"
    xlink:role="http://www.xbrl.org/2003/role/totalLabel"
    xml:lang="en"
  >Cash flows from (used in) financing activities [total]</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_PrepaymentsAndValueAddedTaxReceivablesCurrent"
    xlink:to="ALT_PrepaymentsAndValueAddedTaxReceivablesCurrent_label_en"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_PrepaymentsAndValueAddedTaxReceivablesCurrent_label_en"
    xlink:role="http://www.xbrl.org/2003/role/label"
    xml:lang="en"
  >Prepayments and value added tax receivables current</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_CashReceiptsFromRepaymentOfAdvancesAndLoansMadeToOtherPartiesAndProceedsFromSalesOrMaturityOfFinancialInstrumentsClassifiedAsInvestingActivities"
    xlink:to="ALT_CashReceiptsFromRepaymentOfAdvancesAndLoansMadeToOtherPartiesAndProceedsFromSalesOrMaturityOfFinancialInstrumentsClassifiedAsInvestingActivities_label_en"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_CashReceiptsFromRepaymentOfAdvancesAndLoansMadeToOtherPartiesAndProceedsFromSalesOrMaturityOfFinancialInstrumentsClassifiedAsInvestingActivities_label_en"
    xlink:role="http://www.xbrl.org/2003/role/label"
    xml:lang="en"
  >Cash receipts from repayment of advances and loans made to other parties and proceeds from sales or maturity of financial instruments, classified as investing activities</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_IncreaseDecreaseInNumberOfSharesIssued"
    xlink:to="ALT_IncreaseDecreaseInNumberOfSharesIssued_verboseLabel_en"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_IncreaseDecreaseInNumberOfSharesIssued_verboseLabel_en"
    xlink:role="http://www.xbrl.org/2003/role/verboseLabel"
    xml:lang="en"
  >Capital increase</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_ProceedsFromDisposalsOfPropertyPlantAndEquipmentAndIntangibleAssetsOtherThanGoodwill"
    xlink:to="ALT_ProceedsFromDisposalsOfPropertyPlantAndEquipmentAndIntangibleAssetsOtherThanGoodwill_label_en"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_ProceedsFromDisposalsOfPropertyPlantAndEquipmentAndIntangibleAssetsOtherThanGoodwill_label_en"
    xlink:role="http://www.xbrl.org/2003/role/label"
    xml:lang="en"
  >Proceeds from disposals of property, plant and equipment and intangible assets other than goodwill</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_NonControllingInterestsReserveOfExchangeDifferencesOnTranslationMember"
    xlink:to="ALT_NonControllingInterestsReserveOfExchangeDifferencesOnTranslationMember_verboseLabel_en"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_NonControllingInterestsReserveOfExchangeDifferencesOnTranslationMember_verboseLabel_en"
    xlink:role="http://www.xbrl.org/2003/role/verboseLabel"
    xml:lang="en"
  >Non-controlling interests, reserve of exchange differences on translation [member]</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_NonControllingInterestsReserveOfExchangeDifferencesOnTranslationMember"
    xlink:to="ALT_NonControllingInterestsReserveOfExchangeDifferencesOnTranslationMember_label_en"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_NonControllingInterestsReserveOfExchangeDifferencesOnTranslationMember_label_en"
    xlink:role="http://www.xbrl.org/2003/role/label"
    xml:lang="en"
  >Non-controlling interests, reserve of exchange differences on translation [member]</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_MiscellaneousOtherReservesAndRetainedEarningsExcludingProfitLossForReportingPeriodMember"
    xlink:to="ALT_MiscellaneousOtherReservesAndRetainedEarningsExcludingProfitLossForReportingPeriodMember_label_en"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_MiscellaneousOtherReservesAndRetainedEarningsExcludingProfitLossForReportingPeriodMember_label_en"
    xlink:role="http://www.xbrl.org/2003/role/label"
    xml:lang="en"
  >Miscellaneous other reserves and retained earnings, excluding profit (loss) for reporting period [member]</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_ProfitLossFromOrdinaryOperatingActivitiesBeforeShareBasedPaymentTransactions"
    xlink:to="ALT_ProfitLossFromOrdinaryOperatingActivitiesBeforeShareBasedPaymentTransactions_totalLabel_en"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_ProfitLossFromOrdinaryOperatingActivitiesBeforeShareBasedPaymentTransactions_totalLabel_en"
    xlink:role="http://www.xbrl.org/2003/role/totalLabel"
    xml:lang="en"
  >Profit (loss) from ordinary operating activities before share-based payment transactions</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_CashReceiptsFromRepaymentOfAdvancesAndLoansMadeToOtherPartiesAndProceedsFromSalesOrMaturityOfFinancialInstrumentsClassifiedAsInvestingActivities"
    xlink:to="ALT_CashReceiptsFromRepaymentOfAdvancesAndLoansMadeToOtherPartiesAndProceedsFromSalesOrMaturityOfFinancialInstrumentsClassifiedAsInvestingActivities_verboseLabel_en"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_CashReceiptsFromRepaymentOfAdvancesAndLoansMadeToOtherPartiesAndProceedsFromSalesOrMaturityOfFinancialInstrumentsClassifiedAsInvestingActivities_verboseLabel_en"
    xlink:role="http://www.xbrl.org/2003/role/verboseLabel"
    xml:lang="en"
  >Cash receipts from repayment of advances and loans made to other parties and proceeds from sales or maturity of financial instruments, classified as investing activities</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_OtherOperatingExpensesFromNonOrdinaryActivities"
    xlink:to="ALT_OtherOperatingExpensesFromNonOrdinaryActivities_label_en"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_OtherOperatingExpensesFromNonOrdinaryActivities_label_en"
    xlink:role="http://www.xbrl.org/2003/role/label"
    xml:lang="en"
  >Other operating expenses from non-ordinary activities</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_AdjustmentsForFinancialProvisionsAndIncreaseArisingFromPassageOfTime"
    xlink:to="ALT_AdjustmentsForFinancialProvisionsAndIncreaseArisingFromPassageOfTime_verboseLabel_en"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_AdjustmentsForFinancialProvisionsAndIncreaseArisingFromPassageOfTime_verboseLabel_en"
    xlink:role="http://www.xbrl.org/2003/role/verboseLabel"
    xml:lang="en"
  >Adjustments for financial provisions and increase arising from passage of time</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_PurchaseOfPropertyPlantAndEquipmentAndIntangibleAssetsOtherThanGoodwill"
    xlink:to="ALT_PurchaseOfPropertyPlantAndEquipmentAndIntangibleAssetsOtherThanGoodwill_verboseLabel_en"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_PurchaseOfPropertyPlantAndEquipmentAndIntangibleAssetsOtherThanGoodwill_verboseLabel_en"
    xlink:role="http://www.xbrl.org/2003/role/verboseLabel"
    xml:lang="en"
  >Purchase of property, plant and equipment and intangible assets other than goodwill</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_AdjustmentsForProvisionsAndAdjustmentsForDepreciationAndAmortisationExpenseAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss"
    xlink:to="ALT_AdjustmentsForProvisionsAndAdjustmentsForDepreciationAndAmortisationExpenseAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss_label_en"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_AdjustmentsForProvisionsAndAdjustmentsForDepreciationAndAmortisationExpenseAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss_label_en"
    xlink:role="http://www.xbrl.org/2003/role/label"
    xml:lang="en"
  >Adjustments for provisions and adjustments for depreciation and amortisation expense and impairment loss (reversal of impairment loss) recognised in profit or loss</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_ProfitLossFromOrdinaryOperatingActivities"
    xlink:to="ALT_ProfitLossFromOrdinaryOperatingActivities_label_en"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_ProfitLossFromOrdinaryOperatingActivities_label_en"
    xlink:role="http://www.xbrl.org/2003/role/label"
    xml:lang="en"
  >Profit (loss) from ordinary operating activities</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_PurchaseOfPropertyPlantAndEquipmentAndIntangibleAssetsOtherThanGoodwill"
    xlink:to="ALT_PurchaseOfPropertyPlantAndEquipmentAndIntangibleAssetsOtherThanGoodwill_label_en"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_PurchaseOfPropertyPlantAndEquipmentAndIntangibleAssetsOtherThanGoodwill_label_en"
    xlink:role="http://www.xbrl.org/2003/role/label"
    xml:lang="en"
  >Purchase of property, plant and equipment and intangible assets other than goodwill</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_TreasurySharesOtherReservesAndRetainedEarningsExcludingProfitLossForReportingPeriod"
    xlink:to="ALT_TreasurySharesOtherReservesAndRetainedEarningsExcludingProfitLossForReportingPeriod_label_en"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_TreasurySharesOtherReservesAndRetainedEarningsExcludingProfitLossForReportingPeriod_label_en"
    xlink:role="http://www.xbrl.org/2003/role/label"
    xml:lang="en"
  >Treasury shares, other reserves and retained earnings excluding profit (loss) for reporting period</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_ProfitLossFromConsolidatedCompanies"
    xlink:to="ALT_ProfitLossFromConsolidatedCompanies_label_en"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_ProfitLossFromConsolidatedCompanies_label_en"
    xlink:role="http://www.xbrl.org/2003/role/label"
    xml:lang="en"
  >Profit (loss) from consolidated companies</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_AdjustmentsForProvisionsAndAdjustmentsForDepreciationAndAmortisationExpenseAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss"
    xlink:to="ALT_AdjustmentsForProvisionsAndAdjustmentsForDepreciationAndAmortisationExpenseAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss_verboseLabel_en"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_AdjustmentsForProvisionsAndAdjustmentsForDepreciationAndAmortisationExpenseAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss_verboseLabel_en"
    xlink:role="http://www.xbrl.org/2003/role/verboseLabel"
    xml:lang="en"
  >Adjustments for provisions and adjustments for depreciation and amortisation expense and impairment loss (reversal of impairment loss) recognised in profit or loss</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_ImpactOfChangesInScopeAndPaymentOfContingentConsiderationClassifiedAsInvestingActivities"
    xlink:to="ALT_ImpactOfChangesInScopeAndPaymentOfContingentConsiderationClassifiedAsInvestingActivities_verboseLabel_en"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_ImpactOfChangesInScopeAndPaymentOfContingentConsiderationClassifiedAsInvestingActivities_verboseLabel_en"
    xlink:role="http://www.xbrl.org/2003/role/verboseLabel"
    xml:lang="en"
  >Impact of changes in scope and payment of contingent consideration, classified as investing activities</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_IncreaseDecreaseInNumberOfSharesIssuedThroughTransactionsWithOwners"
    xlink:to="ALT_IncreaseDecreaseInNumberOfSharesIssuedThroughTransactionsWithOwners_label_en"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_IncreaseDecreaseInNumberOfSharesIssuedThroughTransactionsWithOwners_label_en"
    xlink:role="http://www.xbrl.org/2003/role/label"
    xml:lang="en"
  >Increase (decrease) in number of shares issued through transactions with owners</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_IncreaseDecreaseInNumberOfSharesOutstandingThroughIssueOfEquity"
    xlink:to="ALT_IncreaseDecreaseInNumberOfSharesOutstandingThroughIssueOfEquity_verboseLabel_en"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_IncreaseDecreaseInNumberOfSharesOutstandingThroughIssueOfEquity_verboseLabel_en"
    xlink:role="http://www.xbrl.org/2003/role/verboseLabel"
    xml:lang="en"
  >Increase (decrease) in number of shares outstanding through issue of equity</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_ProceedsFromNonCurrentBorrowingsAndRepaymentsOfNonCurrentBorrowings"
    xlink:to="ALT_ProceedsFromNonCurrentBorrowingsAndRepaymentsOfNonCurrentBorrowings_label_en"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_ProceedsFromNonCurrentBorrowingsAndRepaymentsOfNonCurrentBorrowings_label_en"
    xlink:role="http://www.xbrl.org/2003/role/label"
    xml:lang="en"
  >Proceeds from non-current borrowings and repayments of non-current borrowings</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_IncreaseDecreaseInNumberOfSharesOutstandingThroughTreasuryShareTransactions"
    xlink:to="ALT_IncreaseDecreaseInNumberOfSharesOutstandingThroughTreasuryShareTransactions_label_en"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_IncreaseDecreaseInNumberOfSharesOutstandingThroughTreasuryShareTransactions_label_en"
    xlink:role="http://www.xbrl.org/2003/role/label"
    xml:lang="en"
  >Increase (decrease) in number of shares outstanding through treasury share transactions</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ifrs-full_NumberOfSharesIssued"
    xlink:to="ifrs-full_NumberOfSharesIssued_periodEndLabel_en"
  />
  <label
    xlink:type="resource"
    xlink:label="ifrs-full_NumberOfSharesIssued_periodEndLabel_en"
    xlink:role="http://www.xbrl.org/2003/role/periodEndLabel"
    xml:lang="en"
  >Number of shares issued at end of period </label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_OtherOperatingIncomeFromNonOrdinaryActivities"
    xlink:to="ALT_OtherOperatingIncomeFromNonOrdinaryActivities_label_en"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_OtherOperatingIncomeFromNonOrdinaryActivities_label_en"
    xlink:role="http://www.xbrl.org/2003/role/label"
    xml:lang="en"
  >Other operating income from non-ordinary activities</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_IncreaseDecreaseInNumberOfSharesOutstandingThroughTransactionsWithOwners"
    xlink:to="ALT_IncreaseDecreaseInNumberOfSharesOutstandingThroughTransactionsWithOwners_verboseLabel_en"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_IncreaseDecreaseInNumberOfSharesOutstandingThroughTransactionsWithOwners_verboseLabel_en"
    xlink:role="http://www.xbrl.org/2003/role/verboseLabel"
    xml:lang="en"
  >Increase (decrease) in number of shares outstanding through transactions with owners</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_AdjustmentsForCostOfNetDebt"
    xlink:to="ALT_AdjustmentsForCostOfNetDebt_verboseLabel_en"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_AdjustmentsForCostOfNetDebt_verboseLabel_en"
    xlink:role="http://www.xbrl.org/2003/role/verboseLabel"
    xml:lang="en"
  >Adjustments for cost of net debt</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_ExcludingAmortisationOfAcquisitionRelatedIntangibleAssets"
    xlink:to="ALT_ExcludingAmortisationOfAcquisitionRelatedIntangibleAssets_label_en"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_ExcludingAmortisationOfAcquisitionRelatedIntangibleAssets_label_en"
    xlink:role="http://www.xbrl.org/2003/role/label"
    xml:lang="en"
  >Excluding amortisation of acquisition related intangible assets</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_IncreaseDecreaseInNumberOfSharesOutstandingThroughTransactionsWithOwners"
    xlink:to="ALT_IncreaseDecreaseInNumberOfSharesOutstandingThroughTransactionsWithOwners_label_en"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_IncreaseDecreaseInNumberOfSharesOutstandingThroughTransactionsWithOwners_label_en"
    xlink:role="http://www.xbrl.org/2003/role/label"
    xml:lang="en"
  >Increase (decrease) in number of shares outstanding through transactions with owners</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ifrs-full_CashFlowsFromUsedInOperatingActivities"
    xlink:to="ifrs-full_CashFlowsFromUsedInOperatingActivities_totalLabel_en"
  />
  <label
    xlink:type="resource"
    xlink:label="ifrs-full_CashFlowsFromUsedInOperatingActivities_totalLabel_en"
    xlink:role="http://www.xbrl.org/2003/role/totalLabel"
    xml:lang="en"
  >Cash flows from (used in) operating activities [total]</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_IncreaseDecreaseInNumberOfSharesOutstandingThroughTreasuryShareTransactions"
    xlink:to="ALT_IncreaseDecreaseInNumberOfSharesOutstandingThroughTreasuryShareTransactions_verboseLabel_en"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_IncreaseDecreaseInNumberOfSharesOutstandingThroughTreasuryShareTransactions_verboseLabel_en"
    xlink:role="http://www.xbrl.org/2003/role/verboseLabel"
    xml:lang="en"
  >Increase (decrease) in number of shares outstanding through treasury share transactions</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_DepreciationAndAmortisationExpenseFromIdentifiableIntangibleAssetsRecognisedAsOfAcquisitionDate"
    xlink:to="ALT_DepreciationAndAmortisationExpenseFromIdentifiableIntangibleAssetsRecognisedAsOfAcquisitionDate_label_en"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_DepreciationAndAmortisationExpenseFromIdentifiableIntangibleAssetsRecognisedAsOfAcquisitionDate_label_en"
    xlink:role="http://www.xbrl.org/2003/role/label"
    xml:lang="en"
  >Depreciation and amortisation expense from identifiable intangible assets recognised as of acquisition date</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_PaymentsToAcquireOrRedeemEntitysSharesAndProceedsFromSaleOrIssueOfTreasuryShares"
    xlink:to="ALT_PaymentsToAcquireOrRedeemEntitysSharesAndProceedsFromSaleOrIssueOfTreasuryShares_label_en"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_PaymentsToAcquireOrRedeemEntitysSharesAndProceedsFromSaleOrIssueOfTreasuryShares_label_en"
    xlink:role="http://www.xbrl.org/2003/role/label"
    xml:lang="en"
  >Payments to acquire or redeem entitys shares and proceeds from sale or issue of treasury shares</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_NonStockPurchasesAndSubcontractingBusiness"
    xlink:to="ALT_NonStockPurchasesAndSubcontractingBusiness_label_en"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_NonStockPurchasesAndSubcontractingBusiness_label_en"
    xlink:role="http://www.xbrl.org/2003/role/label"
    xml:lang="en"
  >Non-stock purchases and subcontracting business</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_AdjustmentsForCostOfNetDebt"
    xlink:to="ALT_AdjustmentsForCostOfNetDebt_label_en"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_AdjustmentsForCostOfNetDebt_label_en"
    xlink:role="http://www.xbrl.org/2003/role/label"
    xml:lang="en"
  >Adjustments for cost of net debt</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_OtherOperatingIncomeFromOrdinaryActivities"
    xlink:to="ALT_OtherOperatingIncomeFromOrdinaryActivities_label_en"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_OtherOperatingIncomeFromOrdinaryActivities_label_en"
    xlink:role="http://www.xbrl.org/2003/role/label"
    xml:lang="en"
  >Other operating income from ordinary activities</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_NonControllingInterestsOtherReservesAndRetainedEarningsExcludingProfitLossForReportingPeriodMember"
    xlink:to="ALT_NonControllingInterestsOtherReservesAndRetainedEarningsExcludingProfitLossForReportingPeriodMember_verboseLabel_en"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_NonControllingInterestsOtherReservesAndRetainedEarningsExcludingProfitLossForReportingPeriodMember_verboseLabel_en"
    xlink:role="http://www.xbrl.org/2003/role/verboseLabel"
    xml:lang="en"
  >Non-controlling interests, other reserves and retained earnings excluding profit (loss) for reporting period [member]</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_ProfitLossFromOrdinaryOperatingActivitiesBeforeShareBasedPaymentTransactions"
    xlink:to="ALT_ProfitLossFromOrdinaryOperatingActivitiesBeforeShareBasedPaymentTransactions_label_en"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_ProfitLossFromOrdinaryOperatingActivitiesBeforeShareBasedPaymentTransactions_label_en"
    xlink:role="http://www.xbrl.org/2003/role/label"
    xml:lang="en"
  >Profit (loss) from ordinary operating activities before share-based payment transactions</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_NonControllingInterestsRetainedEarningsProfitLossForReportingPeriodMember"
    xlink:to="ALT_NonControllingInterestsRetainedEarningsProfitLossForReportingPeriodMember_label_en"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_NonControllingInterestsRetainedEarningsProfitLossForReportingPeriodMember_label_en"
    xlink:role="http://www.xbrl.org/2003/role/label"
    xml:lang="en"
  >Non-controlling interests, retained earnings, profit (loss) for reporting period [member]</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_IncreaseDecreaseInNumberOfSharesIssued"
    xlink:to="ALT_IncreaseDecreaseInNumberOfSharesIssued_label_en"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_IncreaseDecreaseInNumberOfSharesIssued_label_en"
    xlink:role="http://www.xbrl.org/2003/role/label"
    xml:lang="en"
  >Increase (decrease) in number of shares issued</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_CashAdvancesAndLoansMadeToOtherPartiesAndPurchaseOfFinancialInstrumentsClassifiedAsInvestingActivities"
    xlink:to="ALT_CashAdvancesAndLoansMadeToOtherPartiesAndPurchaseOfFinancialInstrumentsClassifiedAsInvestingActivities_verboseLabel_en"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_CashAdvancesAndLoansMadeToOtherPartiesAndPurchaseOfFinancialInstrumentsClassifiedAsInvestingActivities_verboseLabel_en"
    xlink:role="http://www.xbrl.org/2003/role/verboseLabel"
    xml:lang="en"
  >Cash advances and loans made to other parties and purchase of financial instruments, classified as investing activities</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_NonControllingInterestsOtherReservesAndRetainedEarningsExcludingProfitLossForReportingPeriodMember"
    xlink:to="ALT_NonControllingInterestsOtherReservesAndRetainedEarningsExcludingProfitLossForReportingPeriodMember_label_en"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_NonControllingInterestsOtherReservesAndRetainedEarningsExcludingProfitLossForReportingPeriodMember_label_en"
    xlink:role="http://www.xbrl.org/2003/role/label"
    xml:lang="en"
  >Non-controlling interests, other reserves and retained earnings excluding profit (loss) for reporting period [member]</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_CostOfNetDebt"
    xlink:to="ALT_CostOfNetDebt_label_en"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_CostOfNetDebt_label_en"
    xlink:role="http://www.xbrl.org/2003/role/label"
    xml:lang="en"
  >Cost of net debt</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_InterestPaidReceivedClassifiedAsFinancingActivities"
    xlink:to="ALT_InterestPaidReceivedClassifiedAsFinancingActivities_label_en"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_InterestPaidReceivedClassifiedAsFinancingActivities_label_en"
    xlink:role="http://www.xbrl.org/2003/role/label"
    xml:lang="en"
  >Interest Paid Received Classified As Financing Activities</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_NonStockPurchasesAndSubcontractingBusiness"
    xlink:to="ALT_NonStockPurchasesAndSubcontractingBusiness_verboseLabel_en"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_NonStockPurchasesAndSubcontractingBusiness_verboseLabel_en"
    xlink:role="http://www.xbrl.org/2003/role/verboseLabel"
    xml:lang="en"
  >Non-stock purchases and subcontracting business</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_NonControllingInterestsRetainedEarningsProfitLossForReportingPeriodMember"
    xlink:to="ALT_NonControllingInterestsRetainedEarningsProfitLossForReportingPeriodMember_verboseLabel_en"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_NonControllingInterestsRetainedEarningsProfitLossForReportingPeriodMember_verboseLabel_en"
    xlink:role="http://www.xbrl.org/2003/role/verboseLabel"
    xml:lang="en"
  >Non-controlling interests, retained earnings, profit (loss) for reporting period [member]</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital"
    xlink:to="ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital_totalLabel_en"
  />
  <label
    xlink:type="resource"
    xlink:label="ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital_totalLabel_en"
    xlink:role="http://www.xbrl.org/2003/role/totalLabel"
    xml:lang="en"
  >Cash flows from (used in) operations before changes in working capital [total]</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_EmployeeBenefitsExpenseExcludingExpenseFromShareBasedPaymentTransactionsWithEmployees"
    xlink:to="ALT_EmployeeBenefitsExpenseExcludingExpenseFromShareBasedPaymentTransactionsWithEmployees_label_en"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_EmployeeBenefitsExpenseExcludingExpenseFromShareBasedPaymentTransactionsWithEmployees_label_en"
    xlink:role="http://www.xbrl.org/2003/role/label"
    xml:lang="en"
  >Employee benefits expense, excluding expense from share-based payment transactions with employees</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_CashAdvancesAndLoansMadeToOtherPartiesAndPurchaseOfFinancialInstrumentsClassifiedAsInvestingActivities"
    xlink:to="ALT_CashAdvancesAndLoansMadeToOtherPartiesAndPurchaseOfFinancialInstrumentsClassifiedAsInvestingActivities_label_en"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_CashAdvancesAndLoansMadeToOtherPartiesAndPurchaseOfFinancialInstrumentsClassifiedAsInvestingActivities_label_en"
    xlink:role="http://www.xbrl.org/2003/role/label"
    xml:lang="en"
  >Cash advances and loans made to other parties and purchase of financial instruments, classified as investing activities</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_TreasurySharesOtherReservesAndRetainedEarningsExcludingProfitLossForReportingPeriod"
    xlink:to="ALT_TreasurySharesOtherReservesAndRetainedEarningsExcludingProfitLossForReportingPeriod_verboseLabel_en"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_TreasurySharesOtherReservesAndRetainedEarningsExcludingProfitLossForReportingPeriod_verboseLabel_en"
    xlink:role="http://www.xbrl.org/2003/role/verboseLabel"
    xml:lang="en"
  >Treasury shares, other reserves and retained earnings excluding profit (loss) for reporting period</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_AdjustmentsForFinancialProvisionsAndIncreaseArisingFromPassageOfTime"
    xlink:to="ALT_AdjustmentsForFinancialProvisionsAndIncreaseArisingFromPassageOfTime_label_en"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_AdjustmentsForFinancialProvisionsAndIncreaseArisingFromPassageOfTime_label_en"
    xlink:role="http://www.xbrl.org/2003/role/label"
    xml:lang="en"
  >Adjustments for financial provisions and increase arising from passage of time</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_OtherOperatingIncomeFromNonOrdinaryActivities"
    xlink:to="ALT_OtherOperatingIncomeFromNonOrdinaryActivities_verboseLabel_en"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_OtherOperatingIncomeFromNonOrdinaryActivities_verboseLabel_en"
    xlink:role="http://www.xbrl.org/2003/role/verboseLabel"
    xml:lang="en"
  >Other operating income from non-ordinary activities</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_ProceedsFromNonCurrentBorrowingsAndRepaymentsOfNonCurrentBorrowings"
    xlink:to="ALT_ProceedsFromNonCurrentBorrowingsAndRepaymentsOfNonCurrentBorrowings_verboseLabel_en"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_ProceedsFromNonCurrentBorrowingsAndRepaymentsOfNonCurrentBorrowings_verboseLabel_en"
    xlink:role="http://www.xbrl.org/2003/role/verboseLabel"
    xml:lang="en"
  >Proceeds from non-current borrowings and repayments of non-current borrowings</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_EmployeeBenefitsExpenseExcludingExpenseFromShareBasedPaymentTransactionsWithEmployees"
    xlink:to="ALT_EmployeeBenefitsExpenseExcludingExpenseFromShareBasedPaymentTransactionsWithEmployees_verboseLabel_en"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_EmployeeBenefitsExpenseExcludingExpenseFromShareBasedPaymentTransactionsWithEmployees_verboseLabel_en"
    xlink:role="http://www.xbrl.org/2003/role/verboseLabel"
    xml:lang="en"
  >Employee benefits expense, excluding expense from share-based payment transactions with employees</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ifrs-full_IncreaseDecreaseThroughTransactionsWithOwners"
    xlink:to="ifrs-full_IncreaseDecreaseThroughTransactionsWithOwners_totalLabel_en"
  />
  <label
    xlink:type="resource"
    xlink:label="ifrs-full_IncreaseDecreaseThroughTransactionsWithOwners_totalLabel_en"
    xlink:role="http://www.xbrl.org/2003/role/totalLabel"
    xml:lang="en"
  >Increase (decrease) through transactions with owners, equity [total]</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_ExternalOperatingExpensesByNature"
    xlink:to="ALT_ExternalOperatingExpensesByNature_label_en"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_ExternalOperatingExpensesByNature_label_en"
    xlink:role="http://www.xbrl.org/2003/role/label"
    xml:lang="en"
  >External operating expenses by nature</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ifrs-full_CashFlowsFromUsedInInvestingActivities"
    xlink:to="ifrs-full_CashFlowsFromUsedInInvestingActivities_totalLabel_en"
  />
  <label
    xlink:type="resource"
    xlink:label="ifrs-full_CashFlowsFromUsedInInvestingActivities_totalLabel_en"
    xlink:role="http://www.xbrl.org/2003/role/totalLabel"
    xml:lang="en"
  >Cash flows from (used in) investing activities [total]</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_ProfitLossFromConsolidatedCompanies"
    xlink:to="ALT_ProfitLossFromConsolidatedCompanies_totalLabel_en"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_ProfitLossFromConsolidatedCompanies_totalLabel_en"
    xlink:role="http://www.xbrl.org/2003/role/totalLabel"
    xml:lang="en"
  >Profit (loss) from consolidated companies</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_ImpactOfChangesInScopeAndPaymentOfContingentConsiderationClassifiedAsInvestingActivities"
    xlink:to="ALT_ImpactOfChangesInScopeAndPaymentOfContingentConsiderationClassifiedAsInvestingActivities_label_en"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_ImpactOfChangesInScopeAndPaymentOfContingentConsiderationClassifiedAsInvestingActivities_label_en"
    xlink:role="http://www.xbrl.org/2003/role/label"
    xml:lang="en"
  >Impact of changes in scope and payment of contingent consideration, classified as investing activities</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_OtherOperatingExpensesFromOrdinaryActivities"
    xlink:to="ALT_OtherOperatingExpensesFromOrdinaryActivities_label_en"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_OtherOperatingExpensesFromOrdinaryActivities_label_en"
    xlink:role="http://www.xbrl.org/2003/role/label"
    xml:lang="en"
  >Other operating expenses from ordinary activities</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_ProceedsFromDisposalsOfPropertyPlantAndEquipmentAndIntangibleAssetsOtherThanGoodwill"
    xlink:to="ALT_ProceedsFromDisposalsOfPropertyPlantAndEquipmentAndIntangibleAssetsOtherThanGoodwill_verboseLabel_en"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_ProceedsFromDisposalsOfPropertyPlantAndEquipmentAndIntangibleAssetsOtherThanGoodwill_verboseLabel_en"
    xlink:role="http://www.xbrl.org/2003/role/verboseLabel"
    xml:lang="en"
  >Proceeds from disposals of property, plant and equipment and intangible assets other than goodwill</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_ProfitLossFromOrdinaryOperatingActivities"
    xlink:to="ALT_ProfitLossFromOrdinaryOperatingActivities_totalLabel_en"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_ProfitLossFromOrdinaryOperatingActivities_totalLabel_en"
    xlink:role="http://www.xbrl.org/2003/role/totalLabel"
    xml:lang="en"
  >Profit (loss) from ordinary operating activities</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_CostOfNetDebt"
    xlink:to="ALT_CostOfNetDebt_verboseLabel_en"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_CostOfNetDebt_verboseLabel_en"
    xlink:role="http://www.xbrl.org/2003/role/verboseLabel"
    xml:lang="en"
  >Cost of net debt</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ifrs-full_NumberOfSharesIssued"
    xlink:to="ifrs-full_NumberOfSharesIssued_periodStartLabel_en"
  />
  <label
    xlink:type="resource"
    xlink:label="ifrs-full_NumberOfSharesIssued_periodStartLabel_en"
    xlink:role="http://www.xbrl.org/2003/role/periodStartLabel"
    xml:lang="en"
  >Number of shares issued at beginning of period</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_OtherOperatingExpensesFromOrdinaryActivities"
    xlink:to="ALT_OtherOperatingExpensesFromOrdinaryActivities_verboseLabel_en"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_OtherOperatingExpensesFromOrdinaryActivities_verboseLabel_en"
    xlink:role="http://www.xbrl.org/2003/role/verboseLabel"
    xml:lang="en"
  >Other operating expenses from ordinary activities</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_OtherOperatingIncomeFromOrdinaryActivities"
    xlink:to="ALT_OtherOperatingIncomeFromOrdinaryActivities_verboseLabel_en"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_OtherOperatingIncomeFromOrdinaryActivities_verboseLabel_en"
    xlink:role="http://www.xbrl.org/2003/role/verboseLabel"
    xml:lang="en"
  >Other operating income from ordinary activities</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_IncreaseDecreaseInNumberOfSharesIssuedThroughTransactionsWithOwners"
    xlink:to="ALT_IncreaseDecreaseInNumberOfSharesIssuedThroughTransactionsWithOwners_verboseLabel_en"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_IncreaseDecreaseInNumberOfSharesIssuedThroughTransactionsWithOwners_verboseLabel_en"
    xlink:role="http://www.xbrl.org/2003/role/verboseLabel"
    xml:lang="en"
  >Increase (decrease) in number of shares issued through transactions with owners</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_MiscellaneousOtherReservesAndRetainedEarningsExcludingProfitLossForReportingPeriodMember"
    xlink:to="ALT_MiscellaneousOtherReservesAndRetainedEarningsExcludingProfitLossForReportingPeriodMember_verboseLabel_en"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_MiscellaneousOtherReservesAndRetainedEarningsExcludingProfitLossForReportingPeriodMember_verboseLabel_en"
    xlink:role="http://www.xbrl.org/2003/role/verboseLabel"
    xml:lang="en"
  >Miscellaneous other reserves and retained earnings, excluding profit (loss) for reporting period [member]</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_PaymentsToAcquireOrRedeemEntitysSharesAndProceedsFromSaleOrIssueOfTreasuryShares"
    xlink:to="ALT_PaymentsToAcquireOrRedeemEntitysSharesAndProceedsFromSaleOrIssueOfTreasuryShares_verboseLabel_en"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_PaymentsToAcquireOrRedeemEntitysSharesAndProceedsFromSaleOrIssueOfTreasuryShares_verboseLabel_en"
    xlink:role="http://www.xbrl.org/2003/role/verboseLabel"
    xml:lang="en"
  >Payments to acquire or redeem entitys shares and proceeds from sale or issue of treasury shares</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_IncreaseDecreaseInNumberOfSharesOutstandingThroughIssueOfEquity"
    xlink:to="ALT_IncreaseDecreaseInNumberOfSharesOutstandingThroughIssueOfEquity_label_en"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_IncreaseDecreaseInNumberOfSharesOutstandingThroughIssueOfEquity_label_en"
    xlink:role="http://www.xbrl.org/2003/role/label"
    xml:lang="en"
  >Increase (decrease) in number of shares outstanding through issue of equity</label>
  <labelArc
    xlink:type="arc"
    xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
    xlink:from="ALT_OtherOperatingExpensesFromNonOrdinaryActivities"
    xlink:to="ALT_OtherOperatingExpensesFromNonOrdinaryActivities_verboseLabel_en"
  />
  <label
    xlink:type="resource"
    xlink:label="ALT_OtherOperatingExpensesFromNonOrdinaryActivities_verboseLabel_en"
    xlink:role="http://www.xbrl.org/2003/role/verboseLabel"
    xml:lang="en"
  >Other operating expenses from non-ordinary activities</label>
  </labelLink>
</linkbase>