[SailfishDevel] directory structure on Sailfish

[Wim de Vries]

Hi,
Does anyone know about documentation concerning the directory structure 
on Sailfish?

Where are apps installed?
What is the applications data directory?
How can I create extra dirs with data during installation/deployment?
What is the recommended dir for the user to store app data (in my case 
specific text docs)?
What will be the dir name of the mem card?
Is the Sailfish dir structure of the emulator the same as on the final 
device?

Robin already pointed me to QStandardPaths, but that one gives me 
non-existing dir names and not answers to all of the above questions.

Thanks.
wim