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The fourth international conference on Web informa-tion systems and applications(WISA 2007) has received 409 sub-missions and has accepted 37 papers for publication in this issue. The papers cover broad research areas,including Web mining and data warehouse,Deep Web and Web integration,P2P networks,text processing and information retrieval,as well as Web Services and Web infrastructure. After briefly introducing the WISA con-ference,the survey outlines the current activities and future trends concerning Web information systems and applications based on the papers accepted for publication.
The fourth international conference on Web informatics systems and applications (WISA 2007) has received 409 sub-missions and has accepted 37 papers for publication in this issue. The papers cover broad research areas, including Web mining and data warehouse, Deep Web and Web integration, P2P networks, text processing and information retrieval, as well as Web Services and Web infrastructure. After the introduction of WISA con-ference, the survey outlines the current activities and future trends concerning Web information systems and applications based on the papers accepted for publication.