Hi, I am total novice and need some help with QGIS.

is there a user-oriented guide to query construction for WFS systems? I'm trying to figure out what the query capabilities are for WFS systems. Can I put in complicated geometries? what about time&space filters? Any pointers would be appreciated.

@EmilKrabbe You could consult our self-assembling FAQ on QGIS references which includes tutorials, online help, etc.