relax's source code is kept within a version control system called Subversion (http://subversion.tigris.org/). Subversion or SVN allows fine control over the development of the program. The repository contains all information about every change ever made to the program. To learn more about the system the Subversion book located at http://svnbook.red-bean.com/ is a good place to start. The contents of the relax repository can be viewed on-line at http://svn.gna.org/viewcvs/relax/. The current sources can be downloaded using the SVN protocol by typing
$ svn co svn://svn.gna.org/svn/relax/trunk relax-trunk
however if this does not work, try the command
$ svn co http://svn.gna.org/svn/relax/trunk relax-trunk
to download using the HTTP protocol.
The relax user manual (PDF), created 2016-10-28.