dbus-c++ : provide a C++ API for D-BUS ( http://sourceforge.net/projects/dbus-cplusplus/ http://sourceforge.net/apps/mediawiki/dbus-cplusplus/index.php?title=Main_Page )
serd : Library for RDF syntax which supports reading and writing Turtle and NTriples ( http://drobilla.net/software/serd/ )
sord : Library for storing RDF data in memory ( http://drobilla.net/software/sord/ )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a bar
For Paludis use this rsync : rsync://gentoo.zugaina.org/bar-portage
If you have a problem : ycarus(-at-)zugaina.org