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          xml:lang="fr">Actions propres, autres réserves et résultats non distribués, hors profit (perte) pour la période de reporting</label>
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          xml:lang="fr">Achats hors stock et activité de sous-traitance</label>
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          xml:lang="fr">Achats hors stock et activité de sous-traitance</label>
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          xlink:role="http://www.xbrl.org/2003/role/label"
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          xml:lang="fr">Charges de personnel, hors charges liées aux transactions dont le paiement est fondé sur des actions avec les salariés</label>
        <label
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          xlink:role="http://www.xbrl.org/2003/role/verboseLabel"
          xlink:type="resource"
          xml:lang="fr">Charges de personnel, hors charges liées aux transactions dont le paiement est fondé sur des actions avec les salariés</label>
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        <label
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          xlink:role="http://www.xbrl.org/2003/role/label"
          xlink:type="resource"
          xml:lang="fr">Autres charges d’exploitation courantes</label>
        <label
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          xlink:role="http://www.xbrl.org/2003/role/verboseLabel"
          xlink:type="resource"
          xml:lang="fr">Autres charges d’exploitation courantes</label>
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        <labelArc
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          xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
          xlink:from="ALT_OtherOperatingIncomeFromOrdinaryActivities"
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        <label
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          xlink:role="http://www.xbrl.org/2003/role/label"
          xlink:type="resource"
          xml:lang="fr">Autres produits d’exploitation courant</label>
        <label
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          xlink:role="http://www.xbrl.org/2003/role/verboseLabel"
          xlink:type="resource"
          xml:lang="fr">Autres produits d’exploitation courant</label>
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        <labelArc
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          xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
          xlink:from="ALT_ProfitLossFromOrdinaryOperatingActivitiesBeforeShareBasedPaymentTransactions"
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        <label
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          xlink:role="http://www.xbrl.org/2003/role/label"
          xlink:type="resource"
          xml:lang="fr">Bénéfice (perte) des activités d'exploitation avant opérations de paiement en actions</label>
        <label
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          xlink:role="http://www.xbrl.org/2003/role/totalLabel"
          xlink:type="resource"
          xml:lang="fr">Bénéfice (perte) des activités d'exploitation avant opérations de paiement en actions</label>
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          xlink:type="locator"/>
        <labelArc
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          xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
          xlink:from="ALT_ProfitLossFromOrdinaryOperatingActivities"
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        <label
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          xlink:role="http://www.xbrl.org/2003/role/label"
          xlink:type="resource"
          xml:lang="fr">Profits (pertes) d’exploitation courant</label>
        <label
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          xlink:type="resource"
          xml:lang="fr">Profits (pertes) d’exploitation courant</label>
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        <labelArc
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          xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
          xlink:from="ALT_OtherOperatingExpensesFromNonOrdinaryActivities"
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          xlink:type="arc"/>
        <label
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          xlink:role="http://www.xbrl.org/2003/role/label"
          xlink:type="resource"
          xml:lang="fr">Autres charges d’exploitation non courantes</label>
        <label
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          xlink:role="http://www.xbrl.org/2003/role/verboseLabel"
          xlink:type="resource"
          xml:lang="fr">Autres charges d’exploitation non courantes</label>
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          xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
          xlink:from="ALT_OtherOperatingIncomeFromNonOrdinaryActivities"
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          xlink:type="arc"/>
        <label
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          xlink:role="http://www.xbrl.org/2003/role/label"
          xlink:type="resource"
          xml:lang="fr">Autres produits d’exploitation non courants</label>
        <label
          xlink:label="label_ALT_OtherOperatingIncomeFromNonOrdinaryActivities"
          xlink:role="http://www.xbrl.org/2003/role/verboseLabel"
          xlink:type="resource"
          xml:lang="fr">Autres produits d’exploitation non courants</label>
        <loc
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        <labelArc
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          xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
          xlink:from="ALT_CostOfNetDebt"
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        <label
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          xlink:role="http://www.xbrl.org/2003/role/label"
          xlink:type="resource"
          xml:lang="fr">Coût de l’endettement financier net</label>
        <label
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          xlink:role="http://www.xbrl.org/2003/role/verboseLabel"
          xlink:type="resource"
          xml:lang="fr">Coût de l’endettement financier net</label>
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          xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
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          xlink:role="http://www.xbrl.org/2003/role/label"
          xlink:type="resource"
          xml:lang="fr">Résultat des sociétés intégrées</label>
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          xlink:role="http://www.xbrl.org/2003/role/totalLabel"
          xlink:type="resource"
          xml:lang="fr">Résultat des sociétés intégrées</label>
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          xlink:from="ALT_AdjustmentsForProvisionsAndAdjustmentsForDepreciationAndAmortisationExpenseAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss"
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          xlink:role="http://www.xbrl.org/2003/role/label"
          xlink:type="resource"
          xml:lang="fr">Ajustements pour provisions et ajustements pour dotations aux amortissements et perte de valeur (reprise de perte de valeur) comptabilisée en résultat</label>
        <label
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          xlink:role="http://www.xbrl.org/2003/role/verboseLabel"
          xlink:type="resource"
          xml:lang="fr">Ajustements pour provisions et ajustements pour dotations aux amortissements et perte de valeur (reprise de perte de valeur) comptabilisée en résultat</label>
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          xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
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          xlink:type="arc"/>
        <label
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          xlink:role="http://www.xbrl.org/2003/role/label"
          xlink:type="resource"
          xml:lang="fr">Ajustement du coût de l’endettement financier net</label>
        <label
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          xlink:role="http://www.xbrl.org/2003/role/verboseLabel"
          xlink:type="resource"
          xml:lang="fr">Ajustement du coût de l’endettement financier net</label>
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          xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
          xlink:from="ALT_AdjustmentsForFinancialProvisionsAndIncreaseArisingFromPassageOfTime"
          xlink:to="label_ALT_AdjustmentsForFinancialProvisionsAndIncreaseArisingFromPassageOfTime"
          xlink:type="arc"/>
        <label
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          xlink:role="http://www.xbrl.org/2003/role/label"
          xlink:type="resource"
          xml:lang="fr">Ajustements pour provisions financières et actualisation</label>
        <label
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          xlink:role="http://www.xbrl.org/2003/role/verboseLabel"
          xlink:type="resource"
          xml:lang="fr">Ajustements pour provisions financières et actualisation</label>
        <loc
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          xlink:type="locator"/>
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          xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
          xlink:from="ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital"
          xlink:to="label_ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital"
          xlink:type="arc"/>
        <label
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          xlink:role="http://www.xbrl.org/2003/role/totalLabel"
          xlink:type="resource"
          xml:lang="fr">Flux de trésorerie résultant (utilisés dans le cadre) des activités avant variations du fonds de roulement</label>
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          xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
          xlink:from="ifrs-full_CashFlowsFromUsedInOperatingActivities"
          xlink:to="label_ifrs-full_CashFlowsFromUsedInOperatingActivities"
          xlink:type="arc"/>
        <label
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          xlink:role="http://www.xbrl.org/2003/role/totalLabel"
          xlink:type="resource"
          xml:lang="fr">Flux de trésorerie résultant (utilisés dans le cadre) des activités opérationnelles</label>
        <loc
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        <labelArc
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          xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
          xlink:from="ALT_PurchaseOfPropertyPlantAndEquipmentAndIntangibleAssetsOtherThanGoodwill"
          xlink:to="label_ALT_PurchaseOfPropertyPlantAndEquipmentAndIntangibleAssetsOtherThanGoodwill"
          xlink:type="arc"/>
        <label
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          xlink:role="http://www.xbrl.org/2003/role/label"
          xlink:type="resource"
          xml:lang="fr">Achat d’immobilisations corporelles et d’immobilisations incorporelles autres que le goodwill</label>
        <label
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          xlink:role="http://www.xbrl.org/2003/role/verboseLabel"
          xlink:type="resource"
          xml:lang="fr">Achat d’immobilisations corporelles et d’immobilisations incorporelles autres que le goodwill</label>
        <loc
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        <labelArc
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          xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
          xlink:from="ALT_CashAdvancesAndLoansMadeToOtherPartiesAndPurchaseOfFinancialInstrumentsClassifiedAsInvestingActivities"
          xlink:to="label_ALT_CashAdvancesAndLoansMadeToOtherPartiesAndPurchaseOfFinancialInstrumentsClassifiedAsInvestingActivities"
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        <label
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          xlink:role="http://www.xbrl.org/2003/role/label"
          xlink:type="resource"
          xml:lang="fr">Avances de trésorerie et prêts faits à des tiers et achat d’instruments financiers, classé dans les activités d’investissement</label>
        <label
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          xlink:role="http://www.xbrl.org/2003/role/verboseLabel"
          xlink:type="resource"
          xml:lang="fr">Avances de trésorerie et prêts faits à des tiers et achat d’instruments financiers, classé dans les activités d’investissement</label>
        <loc
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          xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
          xlink:from="ALT_ImpactOfChangesInScopeAndPaymentOfContingentConsiderationClassifiedAsInvestingActivities"
          xlink:to="label_ALT_ImpactOfChangesInScopeAndPaymentOfContingentConsiderationClassifiedAsInvestingActivities"
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        <label
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          xlink:role="http://www.xbrl.org/2003/role/label"
          xlink:type="resource"
          xml:lang="fr">Impact des variations de périmètre et paiement de contreparties éventuelles, classées en activités d'investissement</label>
        <label
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          xlink:role="http://www.xbrl.org/2003/role/verboseLabel"
          xlink:type="resource"
          xml:lang="fr">Impact des variations de périmètre et paiement de contreparties éventuelles, classées en activités d'investissement</label>
        <loc
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        <labelArc
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          xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
          xlink:from="ALT_ProceedsFromDisposalsOfPropertyPlantAndEquipmentAndIntangibleAssetsOtherThanGoodwill"
          xlink:to="label_ALT_ProceedsFromDisposalsOfPropertyPlantAndEquipmentAndIntangibleAssetsOtherThanGoodwill"
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        <label
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          xlink:role="http://www.xbrl.org/2003/role/label"
          xlink:type="resource"
          xml:lang="fr">Produits de cessions d'immobilisations corporelles et incorporelles</label>
        <label
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          xlink:role="http://www.xbrl.org/2003/role/verboseLabel"
          xlink:type="resource"
          xml:lang="fr">Produits de cessions d'immobilisations corporelles et incorporelles</label>
        <loc
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          xml:lang="fr">Entrées de trésorerie découlant du remboursement d’avances et de prêts consentis à d’autres parties et produits résultant de la vente ou de l’échéance d’instruments financiers, classés dans les activités d’investissement</label>
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          xml:lang="fr">Flux de trésorerie résultant (utilisés dans le cadre) d’activités de financement</label>
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        <label
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        <label
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          xml:lang="fr">Participations ne donnant pas le contrôle, autres réserves et résultats non distribués, hors profit (perte) pour la période de reporting [member]</label>
        <label
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          xlink:type="resource"
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          xlink:type="resource"
          xml:lang="fr">Participations ne donnant pas le contrôle, réserve des écarts de change résultant de la conversion [member]</label>
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          xlink:type="resource"
          xml:lang="fr">Participations ne donnant pas le contrôle, réserve des écarts de change résultant de la conversion [member]</label>
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          xlink:from="ALT_NonControllingInterestsRetainedEarningsProfitLossForReportingPeriodMember"
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          xlink:role="http://www.xbrl.org/2003/role/label"
          xlink:type="resource"
          xml:lang="fr">Intérêts minoritaires, résultats non distribués, profit (perte) pour la période de reporting [member]</label>
        <label
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          xlink:role="http://www.xbrl.org/2003/role/verboseLabel"
          xlink:type="resource"
          xml:lang="fr">Intérêts minoritaires, résultats non distribués, profit (perte) pour la période de reporting [member]</label>
        <loc
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        <labelArc
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          xlink:from="ifrs-full_IncreaseDecreaseThroughAppropriationOfRetainedEarnings"
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        <label
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          xlink:role="http://www.xbrl.org/2003/role/totalLabel"
          xlink:type="resource"
          xml:lang="fr">Augmentation (diminution) par appropriation de résultats non distribués, capitaux propres</label>
        <loc
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        <labelArc
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          xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
          xlink:from="ifrs-full_IssueOfEquity"
          xlink:to="label_ifrs-full_IssueOfEquity"
          xlink:type="arc"/>
        <label
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          xlink:role="http://www.xbrl.org/2003/role/totalLabel"
          xlink:type="resource"
          xml:lang="fr">Émission de capitaux propres</label>
        <loc
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        <labelArc
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          xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
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          xlink:to="label_ifrs-full_DividendsPaid"
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        <label
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          xlink:role="http://www.xbrl.org/2003/role/totalLabel"
          xlink:type="resource"
          xml:lang="fr">Dividendes comptabilisés au titre des distributions aux propriétaires</label>
        <loc
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        <labelArc
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          xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
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        <label
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          xlink:role="http://www.xbrl.org/2003/role/totalLabel"
          xlink:type="resource"
          xml:lang="fr">Augmentation (diminution) par le biais d’autres changements, capitaux propres</label>
        <loc
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        <labelArc
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          xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
          xlink:from="ifrs-full_IncreaseDecreaseThroughTreasuryShareTransactions"
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        <label
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          xlink:role="http://www.xbrl.org/2003/role/totalLabel"
          xlink:type="resource"
          xml:lang="fr">Augmentation (diminution) par le biais de transactions sur actions propres, capitaux propres</label>
        <loc
          xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_IncreaseDecreaseThroughSharebasedPaymentTransactions"
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        <labelArc
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          xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
          xlink:from="ifrs-full_IncreaseDecreaseThroughSharebasedPaymentTransactions"
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        <label
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          xlink:type="resource"
          xml:lang="fr">Augmentation (diminution) par le biais de transactions dont le paiement est fondé sur des actions, capitaux propres</label>
        <loc
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          xlink:from="ifrs-full_IncreaseDecreaseThroughTransactionsWithOwners"
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        <label
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          xlink:type="resource"
          xml:lang="fr">Augmentation (diminution) par le biais de transactions avec les propriétaires, capitaux propres</label>
        <loc
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        <labelArc
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          xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
          xlink:from="ifrs-full_IncreaseDecreaseThroughChangesInOwnershipInterestsInSubsidiariesThatDoNotResultInLossOfControl"
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        <label
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          xml:lang="fr">Augmentation (diminution) par le biais de changements dans les parts d’intérêt dans des filiales qui ne donnent pas lieu à une perte de contrôle, capitaux propres</label>
        <loc
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        <label
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          xlink:role="http://www.xbrl.org/2003/role/label"
          xlink:type="resource"
          xml:lang="fr">Augmentation (diminution) du nombre d'actions en circulation par émission de capitaux propres</label>
        <label
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          xlink:role="http://www.xbrl.org/2003/role/verboseLabel"
          xlink:type="resource"
          xml:lang="fr">Augmentation (diminution) du nombre d'actions en circulation par émission de capitaux propres</label>
        <loc
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          xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label"
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          xlink:type="resource"
          xml:lang="fr">Augmentation (diminution) du nombre d’actions en circulation par le biais de transactions sur actions propres</label>
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          xlink:type="resource"
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