At the moment there is no chapter in the documentation which describes the different workings of arquillian.xml. AFAIU each container adapter can have its own properties, but I think there is still a need to describe the basic workings, eg how to select a named container configuration via arquillian.launch.

See also:

• http://stackoverflow.com/questions/9740938/how-to-select-a-container-by-qualifyer-from-arquillian-xml
• http://stackoverflow.com/questions/10119544/where-can-i-find-the-arquillian-xml-configuration-documentation

Given that arquillian.xml is the main configuration file it is only reasonable that people try to understand Arquillian from this angle.