What is Subversion?Subversion is a free/open-source version control system. That is, Subversion manages files and directories, and the changes made to them, over time. This allows you to recover older versions of your data, or examine the history of how your data changed. In this regard, many people think of a version control system as a sort of "time machine".
– Version Control with Subversion by O'Reilly Media(c)What is a Repository group?A repository group is a collection of repositories that share common characteristics, like backup policy, retention policy, specialized hooks. Each repository group also has its own name space for repository names. Good question. Generally, we'd like to restrict groups to only major entities who will have many repositories. This means that in most cases this will be limited to departments, if they have a need for it. Creating a repository group is a fairly major process and requires that the subversion servers be taken off line. Due to this requirement, groups will only be created at specific points in the year to avoid impacting those using the server. | 