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An artificial language used by documentation systems for purposes of indexing.

Controls that synonyms and near-synonyms are cross-referenced equivalently and homonyms and polysemes are distinguished by qualifiers. Contrôle terminologique	Langage contrôlé	Liste d'autorité
A controlled and dynamic documentary language containing semantically and generically related terms, which comprehensively covers a specific domain of knowledge. Thésaurus

Langage d'indexation