Jari Aalto's List: socialapps

commenting, annotating, modifying, reusing, … The PDF is not a system adapted to such collaboration carried out online. Although PDFs can be and are largely shared over the Internet they are really an off-line technology. For example, they can be locally annotated and comments commented on and the annotated documents can then be posted to others. But this way of annotating doesn’t have the power of an online collaboration system like DIIGO which links comments and annotations to a document and displays those annotations to chosen people without actually changing the original web document.