4. Available data
The diversity of available data is now very wide, in terms of sectors of activity, the nature of the information and the media and means of access
The three main factors are not independent. For example, bibliographic data covers broad sectoral or multidisciplinary fields, while numerical or factual data corresponds to specific domains. Similarly, image processing is more often carried out locally (CD-ROM) than online, given transmission speeds, but here the situation is evolving very rapidly.
Currently, the number of online databases worldwide reported by the American Gale Directory exceeds 5,000, and growth over the last 15 years has been very rapid, although it is currently tending to decrease in intensity (figure
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Available data
The producers
Economic data
1. Costs and pricing of online databases
The costs of using online databases correspond to the various stages involved in accessing information: telephone network, teletransmission network(s), server and databases.
1.1 Telephone networks and remote transmission
Apart from the basic telephone network unit (0.73 F), teletransmission costs depend on the networks used, the duration...
Bibliography
References
Database directories
Gale Directory of Databases. Vol. 1: Online Databases. January 1997, Gale Research.
Répertoire des banques de données professionnelles. 15th edition, 1996, ADBS, Paris, 783 p.
Répertoire des banques de données Télétel pour l'entreprise....
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