摘要：The first part of the paper deals with the issues of document authenticity, cognitive authority and multiperspectivity in the Web. By using contextual metadata in search results a search engine or a digital library can give users the kind of hints or clues about the nature of the described document or Web site that could not be generated by using ordinary content indexing technologies. These hints are about document’s context: its origin, history, cognitive authority and place in an intellectual tradition. The author argues that this kind of contextual metadata should not be generated by machines, but by humans. Problems associated with the authenticity of contextual metadata are briefly discussed.
