In addition, many challenging aspects of the research problem addressed in the fall area Semantic Web in the field of artificial intelligence or AI techniques work. Canadian Semantic Web: Technologies and Applications is edited volume contributed by leaders around the world in Semantic Web research, and based on May 2009, Canadian Semantic Web Symposium, Kelowna, BC. This book will introduce the theories of the most advanced work, prototypes and applications, AI technology in the Semantic Web, Language, tools and methodologies for Semantic Web, search, query, visualize and interpret the Semantic Web, Semantic Web-based Knowledge Management, Semantic Grid and Grid service semantics, trust, privacy, security on Semantic Web and more.