<sect1 id="repo-convs-layout"> <title>Repository Layout</title> <para> &TCAR; is supported by <ulink url="http://subversion.tigris.org/">Subversion</ulink>, a version control system which allows you to keep old versions of files and directories (usually source code), keep a log of who, when, and why changes occurred, etc., like CVS, RCS or SCCS. </para> <para> &TCAR; is made of one <quote>source repository</quote> and many <quote>working copies</quote> of that source repository. The working copies are independent one another, can be distributed all around the world and provide a local place for designers, documentors, translators and programmers to perform their work in a descentralized way. The source repository, on the other hand, provides a central place for all independent working copies to interchange data and provides the information required to permit extracting previous versions of files at any time. </para> <para> The first level of directories in the repository provides organization through a convenctional <quote>trunk</quote>, <quote>branches</quote> and <quote>tags</quote> layout. In this configuration the <filename class="directory">trunk</filename> directory is where main changes take place, the <filename class="directory">tags</filename> directory is where frozen copies of <filename class="directory">trunk</filename> changes are placed in for releasing, and the <filename class="directory">branches</filename> directory is an intermediate place between <filename class="directory">trunk</filename> and <filename class="directory">tags</filename> states where changes take place before being merged into <filename class="directory">trunk</filename> and finally released into <filename class="directory">tags</filename>. </para> <para> The second level of directories in the repository provides organization for repository work lines, as described in <xref linkend="repo-convs-worklines" />. </para> <para> All other subsequent levels of directories in the repository, from third level on, are created to organize specific concepts related to the work line they are in. </para> </sect1>