The Extensible Markup Language (XML) is playing an increasingly important role in the exchange of a wide variety of data on the Web and elsewhere. The database c- munity is interested in XML because it can be used to represent a variety of data f- mats originating in different kinds of data repositories while providing structure and the possibility to add type information. The theme of this symposium is the combination of database and XML te- nologies. Today, we see growing interest in using these technologies together for many Web-based and database-centric applications. XML is being used to publish data from database systems on the Web by providing input to content generators for Web pages, and database systems are increasingly being used to store and query XML data, often by handling queries issued over the Internet. As database systems incre- ingly start talking to each other over the Web, there is a fast-growing interest in using XML as the standard exchange format for distributed query processing. As a result, many relational database systems export data as XML documents, import data from XML documents, provide query and update capabilities for XML data. In addition, so-called native XML database and integration systems are appearing on the database market, and it s claimed that they are especially tailored to store, maintain and easily access XML documents."

 This book constitutes the thoroughly refereed joint post-proceedings of the VLDB 2002 Workshop on Efficiency and Effectiveness of XML Tools and Techniques, EEXTT and the CAiSE 2002 Workshop on Data Integration over the Web, DIWeb. The 10 revised full papers presented were carefully selected during two rounds of reviewing and revision. The papers are organized in topical sections on XML languages, XML modeling and integration, XML storage, benchmarking XML, and data integration over the Web.

This book constitutes the thoroughly refereed joint post-proceedings of three workshops held as part of the 8th International Conference on Extending Database Technology, EDBT 2002, in Prague, Czech Republic, in March 2002.The 43 revised full papers presented were carefully selected from approximately 130 submissions during two rounds of reviewing and revision. The papers are organized in topical sections on XML and metadata, extraction of structure information and transformation of XML documents, querying of XML, XML database systems and performance evaluation, video retrieval, multimedia retrieval, intelligent documents, Web documents, system architectures, query processing, Internet and databases, adaptable databases, and large databases.