, ( svn copy). , , , svn merge , , ( , ). , SVN -. devel (svn copy), -, , svn trunk (live), .
The advantage of this is to use one of the distributed repository systems, such as Mercurial (although this is a great product), that is, your branch is on a server that has more reliable hard drives and more frequent backups, If you commit your local Mercurial repository, and your desktop computer is dying, your work will be lost. It also means that if you want to collaborate with a selected group of people (I hope you have some kind of QA before you press the code on the trunk !!!), you can do this by pointing them to your branch.
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