Abstract: The present invention allows computer users to enrich network loaded documents, including HTML-sites, discussion boards, forums, blogs, chat sessions, web links, and documents represented in a browser, with additional information from a multitude of information sources which can be web-based or locally stored. The enrichment of information is controlled by a cooperative system component, which includes an interceptor to obtain location information, an analysis component to extract data from the web-based information, application cases stored in an application case store to categorize the available information and their use, a client side application logic which manages the information processing and formats the output of additional information, which is represented in an additional output component in form of text, graphic, audio, video, animation, executable content and other document types.