Subversion is an open source version control system that allows users to track changes to electronic data over time. It was created in 2000 by CollabNet and is now an independent open source project hosted on Tigris.org. Subversion uses a three-dimensional file system to efficiently store file versions and uses transactions to keep changes atomic. It provides features such as versioning of symbolic links, support for binary files, branching and tagging that are cheap operations.

1. SUBVERSION (SVN) By: Saurabh Saxena & Arunima Goswami

6. LAYERS Contd. Ra Handles "repository access", both local and remote. Repositories are referred to using URLs, i.e. file:///path/ for local access, http://host/path/ (or https) for WebDAV access svn://host/path/ (or svn+ssh) for the SVN protocol. Client, Wc The highest level. It abstracts repository access It provides common client tasks, e.g authenticating the user, or comparing versions. The Wc library is used by Client to manage the local working copy.