A French-language professional study of information retrieval, this work examines how users, systems, and document collections interact in the search for relevant material. The subtitle, *du texte intégral au thésaurus*, points to its focus on methods for moving from full-text searching toward controlled vocabulary and thesaurus-based organization. It addresses core documentation concerns such as indexing, language control, term selection, and the design of retrieval tools that help make large bodies of text more accessible. Written for readers interested in library science, documentation, and information systems, the book treats searching as both a technical and conceptual process. Rather than presenting retrieval as a simple act of entering keywords, it considers how meaning is represented, how terms are standardized, and how structured vocabularies can improve precision and consistency. The work is especially relevant to professionals and students concerned with organizing knowledge, improving access to documents, and understanding the relationship between natural language and controlled indexing systems.

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