Check ~/.config/tracker/tracker-miner-fs.cfg file to know/configure what directories is tracker watching. Either you move your files to any of those locations, or you add your documents path there.
Wait for tracker to index that folder (tracker-status should show the progress), and then run a query with:
tracker-sparql -q 'SELECT ?u ?f WHERE ?f a nfo:TextDocument; nie:url ?u. }'
?u is the location (the usual "path" of the file) and ?f is a tracker URL. Then you can run:
tracker-info [tracker URL] and see what tracker knows about that file. Check that all the data coming from the file is there.
Now, if you want to add more information (like your tags or some custom date), you need to insert it from your program in tracker. To do that there is a command line tool (tracker-sparql -u ) or by code using the DBus API. Here is an example in python. It contains more things, but it is not difficult to extract the bits you need:
http://git.gnome.org/browse/tracker/tree/examples/rss-reader/tracker_backend.pyRegards,
Ivan