In ColDesp, we're making a point of using the original .scx filename as the @xml:id attribute of the XML file created from it. This is easier if the original input filename and path are exposed to the transformation system, so I've added hooks which expose that information through two variables tied to placeholders. If you include ___inputFilePath___ or ___inputFileName___ in your replacement text, the path or name of the file currently being processed will be substituted. I'll add similar hooks into the JavaScript through bound JS variables. This will all need to be documented before the next release.