tracker : A tagging metadata database, search tool and indexer ( https://wiki.gnome.org/Projects/Tracker )
tracker-miners : Collection of data extractors for Tracker/Nepomuk ( https://wiki.gnome.org/Projects/Tracker )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a gnome-next
For Paludis use this rsync : rsync://gentoo.zugaina.org/gnome-next-portage
If you have a problem : ycarus(-at-)zugaina.org