>One of the items for XSL Tools that we were not able to provide out of the box was support for debugging XSLT stylesheets using the Saxon processor. However, there is good news for those that wish to use XSL Tools and debug their stylesheets using SAXON (especially useful for XSLT 2.0 support).
The Cakupan project being hosted at Google Code, has created the necessary plugin needed to enable the debugging support. More information can be found at their project.