This a branch-off of the UniversalDetector.framework source code taken from the Perian SVN using the following procedure: git svn clone http://svn.perian.org/trunk/ clone --no-hardlinks trunk UniversalDetector cd UniversalDetector git filter-branch --subdirectory-filter UniversalDetector HEAD -- --all git reset --hard git gc --aggressive git prune git remote rm origin The procedure above is based on http://stackoverflow.com/questions/359424/detach-subdirectory-into-separate-git-repository and keeps the history intact. I have put this up with the intention of collecting the various efforts of maintaining of and changes to this framework's source code here on github. The core of the frameworks is the (LGPL) Mozilla automatic charset detection library. You can read more about it here: http://www.mozilla.org/projects/intl/detectorsrc.html