Book excerpt: This book constitutes the refereed proceedings of the Second International Workshop on Databases in Networked Information Systems, DNIS 2002, held in Aizu, Japan in December 2002. The 16 revised full papers presented with five invited papers were carefully reviewed and selected for inclusion in the book. The papers are organized in topical sections on information interchange and management systems, Web data management systems, data management systems, networked information systems applications, and networked information systems implementations.