One interesting detail is that a lack of deep nesting was in fact a deliberate design goal for HTML originally, to make WYSIWYG editing more feasible. http://i

One interesting detail is that a lack of deep nesting was in fact a deliberate design goal for HTML originally, to make WYSIWYG editing more feasible. http://info.cern.ch/hypertext/WWW/MarkUp/HTMLConstraints.html http://info.cern.ch/hypertext/WWW/MarkUp/HTMLConstraints.htm...