Patent attributes
System and method of enhancing previously published PDF document files, including files signed or locked to prevent further editing, with enhancement data stored external to the PDF document files. Here an internet server (enhancement server) is configured with a database that stores a plurality of PDF document files, linked with corresponding PDF document URL, enhanced content data, and statistics. When the enhancement server receives a particular PDF document URL request, it returns annotated PDF information that combines the original PDF document and the enhanced content data. This annotated PDF information can be viewed in the GUI of a remote computerized device. The enhancement server can also receive user input from the remote device, store user uploaded data and files, update user statistics, and use this data to enhance the PDF files further. Applications include PDF linked Q&A, lectures, walkthroughs, enhanced media, and chat sessions.
