In order to survive the massive competition created by the new online economy, traditional businesses are under the pressure to take advantage of the information revolution brought about by the Internet and the Web technology. Organizations of all sizes are moving their main businesses on the Web for more automation, efficient business processes, and global visibility. Web Services has gained a considerable momentum as paradigms for supporting both Business-to-Consumer (B2C) interaction and Business-to-Business (B2B) collaboration. As more Web services become available, it is important to share information between different Web services, and urgent to ally different services to provide newer, more powerful services quickly enough. Web Services composition technology is proposed to solve those problems. In this paper, we give an overall survey on Web Services composition. Key technologies in service composition and new challenges it faces are also researched. Based on those study, a dynamic Web Services Composition platform, Star Web Services Composition Platform (StarWSCoP) developed by us is introduced.
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