Downloading MODx
MODx is available for download from the site http://MODxcms.com/downloads.html. Make sure that you download MODx Evolution and not MODx Revolution. MODx is distributed under the GNU General Public License which, on a lighter note, means that you can download it for free, install it on as many sites as you like, and even modify and redistribute it under a new name. For more information about the license, refer to http://MODxcms.com/license.html.
Like most open source projects, MODx has a stable release and a preview beta release. The stable release is what has been tested and made ready for production. For any production use, you must be using the stable version. The preview and beta release is to test out new features and possibly identify any bugs, in the process of using it. There is also a development snapshot that can be checked out (downloaded) from the SVN repository (http://MODxcms.com/svn.html) as the developers make changes.
For this book, we will be using the stable...