Multimedia World Wide Web based publishing system in which the web page files have markup tags that allow the page to be displayed in two or more formats so that older browser versions can view pages in at least a simpler format

摘要

Web-based multimedia publishing where multimedia web pages have descriptors or tags that allow the pages to be viewed in two or more visualization modes. One visualization mode is better (more complex) than the second and switching between the two is instigated by pressing a key.