I need to have different ROOT logger levels (INFO,DEBUG,WARN,etc) to different appenders (file..)

something like:

<configuration>

<!-- ..... appender defintitions ---- >

<root>
    <level value="debug" />
    <appender-ref ref="STDOUT" />
</root>

   <another root???>
    <level value="error" />
    <appender-ref ref="errorLog" />
    </root>

</configuration>

But I'm not sure how to do this syntax in the XML config file. Looked through the documentation and examples, and I did not see it.
Any one can help, I appreciate it...

--
Regards,

Alex Hoyos