摘要: The integration of different library catalogues into a union catalogue is desirable goal in order to extend the available information and ease user’s access as well improve user friendliness. Such no straight forward process because diversity peculiarities involved sourcesystems. This article describes some problems authors encountered during their approach reengineer such prepare its data for later shows three-phase that was used. It has proven useful remodel store it intermediately reverse engineer sourcesystem reconstruct conceptual model.