Hi, To finish my project, aimed to describe a GUI application from SVG , I definitely need a way defining type of GUI element when drawing from inkscape (button, label,scrollbar...) . I am using the id to name the component eg (startstop) and I need another way categorize it (eg button). I do not want the following form : id=rtstopButton, because I would need string treatment when parsing svg to remove "Button" Have you got another idea/way ? Best Regards S.Ancelot