In last post, a quick-and-dirty prototype is developed to make Gelman running. In this post, I would tail the XSLT for our needs. If you have not tried XSLT, consider the XSLT (for dummies and official reference). It is a powerful tool, if you only take interest data extraction, You could compare the efforts to parse XML, for example, PyAWS. The xsl is not in the repository since we need a URI to access.