是否有用于绘制直方图和折线图的XML模式 - XSLT已经可用？

I'm trying to generate SVG-based histograms / line-graphs from data I have in another format. Before I try and re-invent an inferior wheel - is there already a well-used simple-to-use , fit-for-purpose XML format with XSLTs that can do the graphing part for me ?I'm trying to generate SVG-based histograms / l