It is because of the extra links. In the contains/contained by section,
every child/ancestor is now a link. For the previous versions I'd jumped
through some hoops to turn off those links, in order to keep the size of
the PDF down. From talking with PDF experts, I've been told that the links
can take up quite a bit of space, and activating those links added a very
large number of them.
Robert D Anderson
IBM Authoring Tools Development
Chief Architect, DITA Open Toolkit
(507) 253-8787, T/L 553-8787
"Grosso, Paul"