The present invention uses a markup language that defines elements which improve the ability of users to view more complex documents, particularly graphical documents, such as those based on data generated by computer-aided design, computer-aided software engineering, or other data modeling tools. An...http://www.google.com.au/patents/US20020023110?utm_source=gb-gplus-sharePatent US20020023110 - DOCUMENT MARKUP LANGUAGE AND SYSTEM AND METHOD FOR GENERATING AND DISPLAYING DOCUMENTS THEREIN
