"Xerox has a tool that helps automate the categorization process, but allows the engineer - the subject matter expert - to create his own categories dynamically in a way a machine-learning system could not."
"They are built to be human-usable (...) are targeted primarily for storage/retrieval of personal information and serendipitous discovery of group information . (...) The development communities for each are abuzz with ideas for exploiting the structure"
"Of particular interest are its application to categorizing content in developing fields, and allowing the navigation of content sets by browsing. (...) social aspects and implications of these community-created systems are also of great significance"