A VISUAL DEBUGGER FOR STYLESHEETS

A visual Debugger for stylesheets assists a user of stylesheets debug the stylesheets by: allowing the user to set breakpoints on the stylesheet; running to, and stopping at, the breakpoints; single stepping through each template rule as the rule is fired (both forward and backward); evaluating the template rule on the fly; showing the relationship between each template rule and the source document that provides the data; supporting stylesheets that call external programs written in Java or JavaScript; supporting stylesheets that include or import other stylesheets; supporting XML documents that use the "?xml-stylesheet" processing instruction to include stylesheets; supporting multiple debug sessions; and allowing the user to edit the stylesheet or source document and then allowing the debugger to be relaunched.