Where is metadata stored ?

["Hugo Palma" <hugo m palma gmail com>]

Hi all,

i'm just starting to explore F-Spot and i'm loving the experience. 
Still, two questions have just appeared that i can't an answer to.

Where is the tags metadata stored ?
I don't see any files in the photos directories like 
Picasa.ini files. I can't find anything in my home directory. Where is it ?

Also, how does the "Write Metadata to File" option work ? I couldn't  find anything about it in the user guide.


Thanks,

Hugo