Documentation; "at most one <root> element" not true

[dnsmkl2]

https://logback.qos.ch/manual/configuration.html#syntax

Nevertheless, the very basic structure of the configuration file can be described as, element, containing zero or more elements, followed by zero or more elements, followed by at most one element.

But I see log back configs with

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

I do recognize that full and lawyerish reading of the docs could allow putting some peaces together.

But it would be quite useful for docs to contain such blunt example:

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

getLogger("a.b").logAtDebug("This message goes to XXX?");

Related: https://stackoverflow.com/questions/41647036/multiple-root-loggers-with-logback-conditionals