Here you can find documents that describe the usage of some of the main classes provided by the Commons Configuration project. Prior to the 1.3 release these howto documents made up the user documentation. In Commons Configuration 1.3 they have been replaced by a new user's guide. So if you are using a newer version of Commons Configuration you should jump to this new user's guide. For versions up to 1.2 you are right here.
The following doucments are available: