&TCAR; is made of one central repository and many working copies of that central repository. The working copies are independent one another, can be distributed all around the world and provide a local place for designers, documenters, translators and programmers to perform their work in a decentralized way. The central repository, on the other hand, provides a common place for all independent working copies to interchange data in the community. The current infrastructure that holds &TCAR; is supported by Subversion, 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 and Trac, a web-based software project management and bug/issue tracking system emphasizing ease of use and low ceremony. In addition to current Subversion infrastructure, we are working on a Git infrastructure with the intention of migrating the central repository to it, progressively. Here we use Gitolite to manage Git repositories, Gitweb to make changes browsable through the web and Mantis to track repository issues. The main reason for this migration is to take advantage of distributed version control system inside &TCAR;. It also let people to commit changes locally, without any network access, and later push local commits up to central repository, when the network access be re-established. This could be very useful in very different kind of situations.

In this layout, the first level of directories inside &TCAR; provides the Subversion's standard trunk-branches-tags layout. The second level of directories provides organization for different work lines, as described in . All other subsequent directory levels from second level on exist to organize specific concepts related to the work line they belong to.

In this layout, the first level of directories provides organization for different work lines, as described in . All other subsequent directory levels from second level on exist to organize specific concepts related to the work line they belong to.