Refer to message from 17 May 2001 KHS . In process another doc, if you have to hand fix up structure, how to do it. Not sure that either answers question. That only here. The doc in process shows how to use tag panel to fix structure.
Basic paradigm is to put dots on page how author wants.
May problems due to the fact that only marks are there. Also requires that you include logical structure of doc. Lays out rules for structure. LG Basicaly reflect HTML on some level, particularly tables. A spec for this part of PDF, available on developer site.