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Annotation tools allow users to complement existing documents with comments, suggestions or other information. Currently, desktop annotation tools are much more sophisticated than those available for annotating Web documents. EspiritUs is a Web services based system designed to allow users to create, share, and search annotations on the Web. In this article we analyze in detail existing Web annotation tools, present the adopted architecture based on XML technologies, describe the system implementation and present two possible annotation scenarios. Finally, we present some conclusions and guidelines for future work for this project.
Date of Conference: 22-26 Aug. 2005