Configuring log4cxx using XML

1) It seems there is very little documentation on how to configure the 
behaviour of log4cxx using configuration files. I had to guess a lot and 
look on log4j for clues (and that documentation is just as bad). Anyway, 
now I think I have a working file.
2) If I understand correctly as described under "Default Initialization 
Procedure" what happens is first it checks for the enviroment variables 
LOG4CXX_CONFIGURATION and if that doesn't exist it looks for 
log4j.configuration and if that also fails it looks for the files 
log4cxx.properties, log4j.properties, log4cxx.xml and log4j.xml in the 
current working directory. Ok, I have a file called log4cxx.xml and on 
upstart I get
No appenders could be found for logger (root).
Please initialize the log4cxx system properly.

I have tried to enter errors into the file and rename if to see if it's 
being read, but it seems like it's ignored. Do I really need to use 
DOMConfigurator::configure() ?
I'm running under Fedora 3.

--
Cell: +46 737 282 486
Phone: +46 8 442 75 94 (ext 242)
Fax: +46 8 24 05 08
www.jadestone.se
Björns Trädgårdsgränd 1, 116 21 Stockholm, Sweden