The buster is a XUL interface to the conformance tests shipped as part of Xalan. For information about Xalan, please see http://xml.apache.org/. For your convenience we provide a packed distribution of all needed files in http://www.axel.pike.org/mozilla/xalan.tar.gz. Please see the included LICENSE.txt or http://xml.apache.org/dist/LICENSE.txt for terms of distributing those files. To use the buster, open buster.xul with an XSLT enabled Mozilla. Open the rdf index file shipped with the test package into the "Xalan index", and the available tests will show up as a tree. Once you have selected the tests you're interested in, press the button "run checked tests", and all the tests will be run. You can save the results into an rdf, and load it for comparison and regression hunting. DiffDOM tries to find out, which tests failed, and will DumpDOM both the result and the reference solution. Not all reference solutions load properly, those need manual love. Good luck and fun Axel Hecht