QALab module defines the basic QALab functionalities, it can be used as is with Ant and it is
used by both Maven plugins.
Check out the UML diagrams here
Also look at the Project Reports menu on the left for project specific items, unit tests, QA etc.
And of course a very special look on the QALab Report and the Movers Report.
The main documentation and overview of QALab is here.