This plugin is used to compute a real violation density metric. 0% is good. 100% or more is bad.
SonarQube in ActionSonarQube in Action (2013)
by Campbell, G. Ann
SonarQube in ActionSonarQube in Action (2013)
by Papapetrou, Patroklos
Sonar Code Quality Testing EssentialsSonar Code Quality Testing Essentials (2012)
by Arapidis, Charalampos S.