Allows you to take full control over every step of the XSL stylesheet transformation process allowing you to isolate, debug and eliminate the most tricky XSLT bugs. Stylus Studio's XSL stylesheet debugger supports setting of XSL breakpoints, incremental execution of XSL stylesheet code (step-in, step-out, step-over), an XSL Variables Window that displays all XSL Variable names & values evaluated against the current context, an XSLT call stack window, an Output Console Window (to report error messages from the XSL processor), and a powerful real-time, incremental XSL Output Preview Window that displays the XSL output tree as it is being constructed.