Have you ever looked for an Open Source CMS for your site? We are sure that you definitely have faced some problems while developing functional models. Maybe you even had to turn down some nice ideas about interface and content. Most likely you thought "It would be cool if there were a macro language to describe my site interfaces without any limitations to predefined stamps". This article introduces XML Sapiens - a tool to turn your ideas into life, giving you the power to set your site alive!