This book constitutes the proceedings of the joint International Conference
APWeb/WAIM 2009 which was held in Suzhou, China, during April 1-4, 2009.
The 42 full papers presented together with 26 short papers and the abstracts of
2 keynote speeches were carefully reviewed and selected for inclusion in the
book. The topics covered are query processing, topic-based techniques, Web data
processing, multidimensional data analysis, stream data processing, data mining
and its applications, and data management support to advanced applications.