Relates to Topic Maps which enable multiple, concurrent views of sets of information objects. The structural nature of these views is unconstrained; they may reflect an object orientated approach, or they may be hierarchical, relational, ordered, unordered or any combination. An unlimited number of topic maps may be overlaid on a given set of information resources. Does not require or disallow the use of any scheme for addressing information objects. Except for the requirement that topic map documents be expressed themselves using SGML (or WebSGML) and HyTime, using the syntax described, neither does it require or disallow the use of any notation used to express information.