Catalog automation: user/system interaction

The online public access catalogs: report of the situation and the work done in Great Britain and USA in a field which has not been much treated in France. The various existing systems are examined from two points of view: the information retrieval techniques and their users interfaces. Some of the latest systems which bring new solutions are described in this article. A special emphasis is put on the user/system interaction and on the « easy to use » aspect.
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