SVN (also called Subversion) is the place where the latest, not-yet-released version of OpenKore is stored.
It will eventually become the next release version of OpenKore. When we say "OpenKore SVN version", we refer to the OpenKore version as stored in the SVN repository.
In computing, Subversion (SVN) is a version control system (VCS) initiated in 2000.
It allows users to keep track of changes made to any type of electronic data, typically source code, web pages or design documents.
Subversion is currently a popular alternative to CVS (another widely used VCS), particularly among open source projects.Projects using Subversion include the Apache Software Foundation, KDE, GNOME, Free Pascal, GCC, Python, Ruby, Sakai, Samba, and Mono.
Subversion is released under the Apache License, making it
free software.
Here are the simple steps on getting it installed on your Linux Server / VPS Hosting through SSH:
I hope this would be helpful for core developers

Best Of Luck !