Towards distributed library systems: Z39.50 in a European context

Z39.50 is an information retrieval protocol. It has generated much interest but is so far little deployed in UK systems and services. This article gives a functional overview of the protocol itself and the standards background, describes some European initiatives which make use of it, and outlines various issues to do with its future use and acceptance. It is argued that Z39.50 is a crucial building block of future distributed information systems but that it needs to be considered alongside other protocols and services to provide useful applications.