diffmk : An application for highlighting the differences between two XML documents ( http://nwalsh.com/java/diffmk/ )
fop : Formatting Objects Processor is a print formatter driven by XSL ( http://xml.apache.org/fop/ )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a dberkholz
For Paludis use this rsync : rsync://gentoo.zugaina.org/dberkholz-portage
If you have a problem : ycarus(-at-)zugaina.org