Resumen

SPEDALIERI, Graciela. Union catalogs: real or virtual ones? A literature review. Inf. cult. soc. [online]. 2002, n.6, pp.53-75. ISSN 1514-8327.

Review of the literature on union catalogs published during the last five years. Developments in the area of distributed search gave place to the creation of virtual union catalogs. Characteristics of both traditional and virtual union catalogs are analyzed, comparing their respective advantages and disadvantages.

Palabras clave : Union catalogs; Virtual union catalogs; Distributed search; Z39.50 Protocol.

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